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The Siglent SPD4121X is a 4-channel DC Linear Programmable Power Supply equipped with a 4.3-inch TFT-LCD display, friendly human-machine interface, and excellent performance indicators. Real-time waveform display provides engineers with an informative user interface. SPD4121X offers a total output power of 285 W with a resolution of 1 mV/1 mA. The maximum voltage and current for each channel are as follows: CH1: 15 V/1.5 A CH2: 12 V/10 A CH3: 12 V/10 A CH4: 15 V/1.5 A Features Rated output power: 285 W Rated voltage: 32 V, 12 V, 30 V Up to four high-precision power supplies with independent controllable outputs, supporting CH2 and CH3 series and parallel connections Clear graphical interface with waveform and timer display modes 5-digit voltage and current display with minimum resolution of 1 mV, 1 mA Fast output response time: <50us The high current channel support remote voltage compensation sense function. The maximum compensation voltage is 0.6 V Overvoltage protection and overcurrent protection or safe and accurate operation Equipped with a 4.3-inch TFT-LCD display (480 x 272 resolution) USB and LAN standard communication USB-GPIB module is optional Excellent channel density with up to 4 channels in a 3U half rack package Internal data storage for setups and parameters Embedded Web Server with instrument communication that doesn’t require software installation Fully SCPI programming command set support as well as a LabView driver for remote control and system automation Specifications SPD4323X SPD4121X SPD4306X Channel Output CH1: Voltage 0 to 6 V Current 0 to 3.2 ACH2: Voltage 0 to 32 V Current 0 to 3.2 ACH3: Voltage 0 to 32 V Current 0 to 3.2 ACH4: Voltage 0 to 6 V Current 0 to 3.2 A CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 12 V Current 0 to 10 ACH3: Voltage 0 to 12 V Current 0 to 10 ACH4: Voltage 0 to 15 V Current 0 to 1.5 A CH1: Voltage 0 to 15 V Current 0 to 1.5 ACH2: Voltage 0 to 30 V Current 0 to 6 ACH3: Voltage 0 to 30 V Current 0 to 6 ACH4: Voltage 0 to 15 V Current 0 to 1 A Resolution 1 mV, 1 mA 1 mV, 1 mA 1 mV, 1 mA Setting Accuracy Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Readback Accuracy Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Voltage: ±(0.03% of reading+10) mV, Current: ±(0.3% of reading+10) mA Display 4.3" TFT-LCD 5-digit voltage and current display 4.3" TFT-LCD 5-digit voltage and current display 4.3" TFT-LCD 5-digit voltage and current display Output power 240 W 285 W 400 W Included 1x Siglent SPD4121X Power Supply 1x Power cord (EU) 1x Output test cord (3 A) 1x USB cable 1x Quick start guide Downloads Datasheet Manual Quick start

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. Low-Noise Lab Power Supply (1)A Quiet Source for Sensitive Circuits STM32 Edge AI Contest 2025: The Winners Batteries TodayTechnology and Differences in Lithium Batteries Adjustable Electronic LoadStatic + Dynamic DC Load Step-Down Converter from 48 V to 5 VThe Story of Circuit Development Autonomous Sensor Node v2.0Part 2: Hardware Validation and Power Optimizations VaristorsPeculiar Parts, the Series Graphical Grid Frequency MeterMonitor Grid Quality Starting Out in Electronics……Brings Its Own End Peak Current Load SMD FerritesMore Resilient Against Current Peaks Elektor Live! Expert Day 2025 Energy Harvesting Set to Accelerate IoT and IIoT Use CasesHow Energy Harvesting Frees IoT from the Grid Fnirsi DPS-150Compact and Portable Power Supply and Converter Adjustable USB-C Power SourceTurn Your USB-C Charger Into an Adjustable Power Supply Simple Charger and Capacity TesterWith Two Cheap “Off-the-Shelf” Modules Smart Color Detector with AI Voice and Playback PbMonitor v2.0Introduction to the Updated Battery Monitoring System A Fan for the Mini Reflow PlateSmart Modifications That Improve Results From Life’s ExperienceThe Tsunami of Indulgence Err-lectronicsCorrections, Updates, and Readers’ Letters 2026: An AI OdysseyWhen Models Start Dictating the Hardware Precision Picoammeter (2)Assembling, Calibration, and Test Wireless Device Poweringwith Inductive Technology AI-Based Autonomous DrivingThe RDW’s Self Driving Challenge 2024 Sound Card as Signal GeneratorPC as DCF77 Test Transmitter

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As demand for solar panel installation has risen sharply, especially for installations larger than balcony power plants, the order books of solar companies are full. If you ask for a quote today, you may have to wait a while, if your request isn't simply postponed indefinitely. Another consequence of the solar boom is that some companies are charging very high prices for installations. Yet there is an obvious and radical solution to the problem of excessive prices: Do it yourself, as the English say. The price of materials is currently affordable, and it's the ideal time for those who do the work themselves. They couldn't save more. Add to this the satisfaction of doing something useful, both economically and ecologically, and the pleasure of building yourself. In this special issue, you'll find a wide selection of Elektor assemblies, from solar panel controllers to solar water heaters and solar panel orientation systems. The issue also contains practical information on solar panel installation and the technology behind them. Finally, there are a number of articles on the subject of balcony power plants, from how to install them to how to connect them to the Internet... Contents BASICS Dimensioning Photovoltaic Panel ArraysAn introduction to photovoltaic energy and the commonest techniques,followed by simplified calculation models and setup guidelines. Light Sensor TechnologyMeasuring daylight using LEDs. Solar Power Made SimpleSolar charging with and without a controller. Cable Cross-sections and Energy Losses in Solar SystemsKey considerations on the minimum values to respect for electricalcurrent in solar panel cabling. Solar ModulesEverything you always wanted to know about solar panels... Ideal Diode ControllerDiode Circuits with Low Power Dissipation. TIPS Tracking for Solar Modules zBot Solar/Battery Power Supply Solar Cell Array Charger with Regulator Solar Cell Voltage Regulator Solar-Powered Night Light Alternative Solar Battery Charger PROJECTS Energy LoggerMeasuring and Recording Power Consumption. Tiny Solar SupplySunlight In, 3.3 V Out. A Do-It-Yourself DTURead Data from Small Inverters by μC. Solar ChargerPortable energy for people on the move. Solar Thermal Energy RegulatorMaximum power point tracking explored. 2-amp Maximum Power Tracking ChargerSolar Power To The Max. Computer-driven HeliostatFollow the sun or the stars. Garden LightingUsing solar cells. Solar Panel Voltage Converter for IoT DevicesYes we CAN exploit indoor lighting. Travel ChargerFree power in the mountains. Solar Cell Battery Charger/MonitorWith protection against deep discharge. Solar-powered Battery ChargerPIC12C671 avoids overcharging and deep charging. Converters for Photovoltaic PanelsContributed by TME (Transfer MultisortElektronik). Solar Charging RegulatorFor panels up to 53 watts. Solar-Powered ChargerFor lead-acid batteries. CAN Bus + Arduino for Solar PV Cell MonitoringDetect and locate serviceable panels in large arrays. Balcony Power Plant 2.0The latest: solar panels, installation and inverters

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Elektor GREEN en GOLD leden kunnen deze uitgave hier downloaden. Nog geen lid? Klik hier om een lidmaatschap af te sluiten. Een stroombron voor het testen van Z-diodesControle van Z-diodes van 1 tot 54 V bij 1 tot 50 mA ESD polsbandtesterEen testapparaat met indicatie voor ‘goed’, ‘grensgeval’ en ‘afgekeurd’ Testapparaat voor de respons op piekbelastingen van voedingenEen generator voor repeterende stapsgewijze belasting voor laboratoriumvoedingen Euclidische sequencer zonder microcontrollerTriggerpatronen en CV-sequenties met eenvoudige CMOS-logica LED-knipperlicht voor heksystemen en meer, inclusief geluidssignaal Printen nodig? De Elektor PCB-service staat voor u klaar Tandenborstel-timerMet een kleine PIC Een contactloos magnetisch combinatieslotMet de AS5600 rotatie-positie sensor Batterijgevoede ruisarme voorversterkervoor dynamische microfoons Het Arduino Nano testLabMeten, sturen en regelen Rhythmische basverlichtingBenadruk het ritme van je muziek Low-cut filterGeen risico op audio-terugkoppeling op uw systeem Nauwkeurige 1 Hz blokgolfgenerator voor breadboardsEen betrouwbare klokpuls op basis van CMOS 555 onderstebovenDutycycles tot nul Van Halfgeleidergids tot Circuit Specials65 jaar innovatie op het gebied van elektronica Elektrische isolatieCAN-interface met digitale isolator en voedingsmodule SpongillatorEen sponsgebaseerde oscillator Echte willekeurige getallengeneratorMet geïntegreerde chi-kwadraattoets 3D-viewer voor HTML-pagina'sEenvoudig en vrijwel zonder code Programmeren met TLScriptEen scripttaal voor metingen, tests en besturing Schakelingsontwerp: tips van experts FeedbackWat is het en waarom is het belangrijk? Eén board, eindeloze ideeën: Arduino UNO QVan retro-gaming tot realtime milieumonitoring Hoe u een donut-antenne repareert Standby-KillerEen echte aan/uit-schakelaar voor uw tv Batterijen testenBatterijen meten met de Arduino Nano Voeding voor audioversterkersEen goede voeding zonder netbrom HF prototype printplatenMaak zelf snel een prototype printplaat Type 3-overspanningsbeveiligingEen type 3-overspanningsbeveiliging voor uw gevoelige apparatuur IoT-kamerthermostaat boardMet een op ESP32-C3/S3 gebaseerde Xiao MCU-module Van star naar slimFlexibele en gedrukte elektronica, tussen visie en industriële realiteit

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. Digital Load for High-Current TestingFrom Necessity to Innovation Vocal RemoverInstant Karaoke Circuit Audio A/B Selector With Gain ControlSwitches from Microphone to Line Inputs Better Charging for the LIR2032Be Kind to Your Coin Cells Touch Sensing Made SimpleA DIY Guide for Any Microcontroller Universal Infrared Remote SwitchA New Life for Old Remotes Microcontroller-Powered Moo BoxMaking Playful Sounds With a Microcontroller USB Battery Interface Powering Low-Draw Devices With Power BanksA “Stay Alive” Solution Small Class-A Audio Amplifier With Current OutputDrive Speakers with Current Instead of Voltage Pseudo-Balanced ModuleHigh CMRR with Unbalanced Audio Links Ni-MH Cells Automatic ChargerRefill All Your Battery Packs in One Go! Thyristor-Based Power Supply Protection Fingerprint Sensor SwitchA Useful Proof-of-Identity Device DC-DC 3-A Power ConverterUpgrade Your Fixed-Voltage Sources Remote Water Heater MonitorVoltage and Current Detection for AC Lines Attenuators for Audio Signals (1)Adjustable Via Jumpers Pimp My Car Battery Charger (Part 1)Don’t Throw It Away, Mod It! A Board for the Blue OnePCB for Alps Motorized Potentiometer with Feedback 50-Hz Reference from 60-Hz Mains VoltageHow to Use 50-Hz Electronics in 60-Hz Environments Digital IsolatorsRealizing Galvanic Isolation Easily Compact 12-W Hi-Fi Mono AmplifierSmall But Powerful LM386 Ramp Generator Three-Phase GeneratorWith Raspberry Pi Pico Door Opener for the Musically Talented Elektor Classic: Surf SynthesizerOcean Watersports Background Sound Generator (OWBSG) Pimp my Car Battery Charger (Part 2)Don’t Throw It Away, Mod It! Lamp Current MonitorWith a Raspberry Pi Pico Infrared Telegraphy Fnirsi SWM-10Repair Battery Packs With This Portable Intelligent Spot Welding Machine Stereo Audio Codec for the ESP32 and Co.No Need to Be Afraid of Audio Measurement Technology Tin Soldering TechniquesMake Them Well Right Away! Attenuators for Audio Signals (2)Switching Via Relays USB-C PowerDrawing Power from USB-C Power Adapters Three Circuits with Two and Three Counter ICs4017 ICs Working Together Active Components – The Diode A Timer For Ultra-Long DelaysSet It, and Forget It! Jack In and Jack OutA Useful Insert Option for Audio Circuits Power an ESP32 from a Single Li-ion Cell Hexadoku

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Le téléchargement intégral de ce numéro est disponible pour nos membres GOLD et GREEN sur le site Elektor Magazine ! Pas encore membre ? Cliquez ici. alimentation de labo à très faible bruit (1)Une source silencieuse pour les circuits sensibles STM32 Edge AI Contest 2025 : les gagnants les batteries aujourd’huiTechnologies et différences entre les batteries au lithium charge électronique réglableCharge CC statique et dynamique convertisseur abaisseur de 48 V à 5 Vune réalisation pratique nœud de capteurs autonome v2.0Partie 2 : validation matérielle et optimisations énergétiques varistancesDrôles de composants, la série compteur graphique de fréquence du réseauSurveillance de la qualité du réseau démarrer en électronique…Touche à sa fin ferrites CMS à charge de courant de crêteplus résistantes aux pics de courant Elektor Live! Expert Day 2025 la récupération d’énergie propulse l’IoT et l’IIoT vers une nouvelle èreLa récupération d’énergie affranchit l’IoT de la dépendance au réseau Fnirsi DPS-150Alimentation portable compacte et convertisseur source d’alimentation USB-C réglableTransformez votre chargeur USB-C en alimentation réglable chargeur simple et testeur de capacitéAvec deux modules économiques « prêts à l’emploi » détecteur de couleurs intelligent avec synthèse vocale et lecture audio basées sur l’IA PbMonitor v2.0Présentation du système de surveillance de batteries mis à jour un ventilateur pour la mini-plaque de refusionDes modifications astucieuses pour des résultats optimisés sur le vifL’excès d’indulgence projet 2.0Corrections, mises à jour et courriel des lecteurs 2026 : une odyssée de l’IAQuand les modèles commencent à orienter le matériel picoampèremètre de précision (2)Assemblage, étalonnage et test alimentation sans fil des appareilsavec technologie inductive conduite autonome basée sur l’IALe Self Driving Challenge 2024 du RDW carte son comme générateur de signauxUn PC utilisé comme émetteur de test DCF77

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Diese Ausgabe steht allen GOLD- und GREEN-Mitgliedern auf der ElektorMagazine-Website zum Download bereit! Sie sind noch kein Mitglied? Hier klicken! Stromquelle zum Testen von (Z-)DiodenPrüfen von Z-Dioden von 1 bis 54 V bei 1 bis 50 mA ESD-Armband-TesterEin Tool zur Funktionsprüfung von Erdungsarmbändern Transientenmesser für LabornetzteileEin reproduzierbarer Lastsprung-Generator für Labornetzteile 3D-Viewer für HTML-SeitenEinfach und fast ohne Code LED-Blinkleuchte für Tore und mehr mit akustischem Alarm Benötigen Sie Leiterplatten? Der Elektor-Leiterplattenservice ist für Sie da. Zahnbürsten-TimerMit einem kleinen PIC Ein berührungsloses magnetisches Kombinationsschlossmit dem AS5600-Drehpositionssensor Rauscharmer, batteriebetriebener Vorverstärkerfür dynamische Mikrofone Das Arduino Nano TestLabMessen, Steuern, Regeln Rhythmische BassleuchteBetonen Sie den Rhythmus Ihrer Musik Low-cut-FilterKein Risiko von Audio-Rückkopplungen in Ihrem System Präziser 1-Hz-Rechteckwellengenerator für SteckbrettEine zuverlässige CMOS-basierte Taktquelle 555 auf den Kopf gestelltTastverhältnisse bis hinunter auf Null Vom „Halfgeleidergids“ zu Circuit Specials65 Jahre Elektronik-Innovation Galvanische TrennungCAN-Schnittstelle mit Digitalisolator und Powermodul SpongillatorEin schwammbasierter Oszillator Echter Zufallszahlengeneratormit integriertem Chi-Quadrat-Test Euklidischer Sequencer ohne MikrocontrollerTrigger-Pattern und CV-Sequenzen mit einfacher CMOS-Logik Programmieren mit TLScriptEine Skriptsprache zum Messen, Testen und Steuern Schaltungsdesign: Tipps von Experten RückkopplungWas ist das und warum ist sie wichtig? Ein Board, endlose Ideen: Arduino UNO QVon Retro-Gaming zur Echtzeit-Umweltüberwachung So bringen Sie eine Donut-Antenne in Ordnung Standby-KillerEin echter Ein-/Ausschalter für den Fernseher Akkus im TestAkkus vermessen mit dem Arduino Nano Stromversorgung für Audio-EndstufenEin gutes Netzteil ohne Netzbrummen Lochrasterplatinen für HFSchnelle Aufbauten mit DIY-Prototyping-Boards T3-ÜberspannungsschutzEin Typ-3-Schutzmodul für empfindliche Geräte IoT-Raumthermostat-Platinemit dem Xiao-MCU-Modul auf Basis des ESP32-C3/S3 Von starr zu smartFlexible und gedruckte Elektronik – zwischen Vision und industrieller Realität

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3K5 Noteworthy Designs (1975-2026) This USB archive stick contains over 3,500 noteworthy circuits from all areas of electronics (audio & video, hobby & modelling, home & garden, test & measurement, computers & microcontrollers, radio, power supplies & batteries) published in Elektor Magazine since 1975. Most circuits are sourced from the Elektor Summer Circuits editions. You can use the article search function to find specific content in the full text. The results are always shown as preformatted PDF documents. Adobe Reader may be used to browse articles as well as find individual words and expressions using the program’s integrated Search functions. Please note that no Summer Circuits editions were published between 2014 and 2022, so these years are not included in the directory. Specifications Storage 16 GB Connectors 1x USB-A1x USB-C

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Elektor GREEN and GOLD members can download their digital edition here. Not a member yet? Click here. Low-Noise Lab Power Supply (1)A Quiet Source for Sensitive Circuits STM32 Edge AI Contest 2025: The Winners Batteries TodayTechnology and Differences in Lithium Batteries Adjustable Electronic LoadStatic + Dynamic DC Load Step-Down Converter from 48 V to 5 VThe Story of Circuit Development Autonomous Sensor Node v2.0Part 2: Hardware Validation and Power Optimizations VaristorsPeculiar Parts, the Series Graphical Grid Frequency MeterMonitor Grid Quality Starting Out in Electronics……Brings Its Own End Peak Current Load SMD FerritesMore Resilient Against Current Peaks Elektor Live! Expert Day 2025 Energy Harvesting Set to Accelerate IoT and IIoT Use CasesHow Energy Harvesting Frees IoT from the Grid Fnirsi DPS-150Compact and Portable Power Supply and Converter Adjustable USB-C Power SourceTurn Your USB-C Charger Into an Adjustable Power Supply Simple Charger and Capacity TesterWith Two Cheap “Off-the-Shelf” Modules Smart Color Detector with AI Voice and Playback PbMonitor v2.0Introduction to the Updated Battery Monitoring System A Fan for the Mini Reflow PlateSmart Modifications That Improve Results From Life’s ExperienceThe Tsunami of Indulgence Err-lectronicsCorrections, Updates, and Readers’ Letters 2026: An AI OdysseyWhen Models Start Dictating the Hardware Precision Picoammeter (2)Assembling, Calibration, and Test Wireless Device Poweringwith Inductive Technology AI-Based Autonomous DrivingThe RDW’s Self Driving Challenge 2024 Sound Card as Signal GeneratorPC as DCF77 Test Transmitter

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Elektor GREEN en GOLD leden kunnen deze uitgave hier downloaden. Nog geen lid? Klik hier om een lidmaatschap af te sluiten. Digitale belasting voor grote stromenvan noodzaak tot innovatie Stemmenroverinstant karaoke-schakeling Audio A/B-keuzeschakelaar met versterkingsregelingschakelt tussen microfoon- en lijningangen Beter laden voor de LIR2032wees lief voor uw knoopcellen Simpele aanraaksensorenmaak ze zelf – voor elke microcontroller Universele infraroodschakelaartweede leven voor oude afstandsbedieningen Microcontroller-gestuurde loeidoosspeelse geluiden met een microcontroller USB-accu-interface Low-power apparaten voeden met een powerbankanti-afschakel-schakeling Kleine klasse-A audioversterker met stroomuitgangstuur luidsprekers aan met stroom in plaats van spanning Pseudo-symmetrische modulehoge CMRR met asymmetrische audioverbindingen Automatische NiMH-laderlaad al uw accu’s in één keer! Thyristorgebaseerde voedingsbeveiliging Schakelaar met vingerafdruk-sensornuttige identiteitscontrole DC/DC-converter voor 3 Aeen upgrade voor vaste-spanningsbronnen Bewaking voor een boilerspannings- en stroomdetectie voor AC-kabels Verzwakkers voor audiosignalen (1)instelbaar met jumpers Poets uw acculader op (1)niet weggooien maar ombouwen! Een print voor ‘de Blauwe’print voor Alps-motorpotmeter met terugkoppeling 50Hz-referentie uit 60Hz-netspanningzo gebruikt u 50Hz-elektronica in 60Hz-landen Digitale isolatoreneenvoudige realisatie van galvanische isolatie Compacte 12W-hifi-monoversterkerklein maar krachtig Zaagtandgenerator met LM386 Driefasen-generatormet Raspberry Pi Pico Deuropener voor muzikaal getalenteerden Elektor-klassieker: Surf Synthesizerzeewatersportachtergrondgeluidgenerator (zwsaggg) Poets uw acculader op (2)niet weggooien maar ombouwen! Lampstroom-monitormet Raspberry Pi Pico Infrarood-telegrafie Fnirsi SWM-10repareer zelf uw accupacks met dit intelligent draagbaar puntlasapparaat Stereo audio-codec voor ESP32 en co.geen angst voor audio-meettechnologie Soldeertechniekendoe het meteen goed! Verzwakkers voor audiosignalen (2)geschakeld met relais USB-C voedingstroom uit USB-C voedingsadapters Drie schakelingen met twee en drie teller-IC’s4017’s werken samen Actieve componenten – de diode Timer voor extreem lange tijdeninstellen en vergeten! Jack in en jack uiteen handige insert-optie voor audioschakelingen ESP32 met één Li-ion-cel Hexadoku

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The Elektor Zener Diode Tester is essentially a constant-current source that can be switched in steps from 1 to 50 mA. It can be used to test Z-diodes up to a maximum of 54 V. Thanks to a 60-V step-up converter, the device can be powered by the usual 5 to 12 V. The principle of this tester is straightforward. A Z-diode or other DUT (device under test, such as an LED) is biased by an adjustable current source. The voltage across the DUT can be measured with a multimeter. The voltage of most (small) Z-diodes is specified at a current of 5 mA. Depending on the application, the voltage at other currents can also be of interest. That is why six current settings are available: 1, 2, 5, 10, 20, and 50 mA. LEDs are often specified at a current of 20 mA. What can be tested is: Whether a Z-diode is defective (short circuit or high impedance). Whether a Z-diode exhibits the correct Z-voltage. How a Z-voltage changes with different currents. What exact voltage is present at an integrated voltage reference. Whether LEDs in a series chain differ in brightness (hence the 20 mA current). What the current gain is for different base currents in (power) transistors. The kit contains all parts listed in the bill of materials including PCB and enclosure. Specifications Supply voltage 5…12 V/2 A (USB-C) Supply current (Itest = 50 mA) 1.1 A @ 5 V / 412 mA @ 12 V Selectable currents 1, 2, 5, 10, 20, and 50 mA Max. test voltage >54 V @ Itest ≥1 mA Max. output voltage 60 V @ Itest = 0 mA Voltage limit at 5 V 4.5 V @ Itest = 1 mA / 5.18 V @ Itest = 50 mA Enclosure dimensions 110 x 82 x 44 mm PCB size 105.4 x 67.3 mm Connections 4 mm banana sockets for multimeter 2 mm banana sockets for test clips USB-C socket for power supply Included Resistors R1 = 3.3 kΩ, 600 mW, 1% R2 = 0.15 Ω, 1 W, 5%, LS 12.7 mm, ø 3.5 mm R3, R8 = 180 Ω, 600 mW, 1% R4, R6, R16 = 1 kΩ, 600 mW, 1% R5, R19 = 47 kΩ, 600 mW, 1% R7 = 3.9 kΩ, 1 W, 5%, LS 12.7 mm, ø 3.5 mm R9, R10, R12 = 10 kΩ, 600 mW, 1% R11, R13 = 100 Ω, 600 mW 1% R14 = 249 Ω, 600 mW, 1% R15 = 499 Ω, 600 mW, 1% R17 = 2.49 kΩ, 250 mW, 1% R18 = 4.99 kΩ, 250 mW, 1% Capacitors C1 = 470 uF / 35 V, 20%, Ir = 1.86 A, ø 12.5 mm, LS 5 mm, ESR = 0.038 Ω (Panasonic EEUTP1V471) C2 = 1 uF / 100 V, 10%, X7R, LS 5 mm C3 = 2.2 nF / 50 V, 10%, X7R, LS 5 mm C4, C7 = 100 nF / 100 V, 10%, X7R, LS 5 mm C5 = 100 uF / 100 V, 20%, ø 14 mm max., LS 5 mm C6 = 1 nF / 100 V, 10%, X7R, LS 5 mm Inductor L1 = 100 uH, Irms = 2.4 A, Isat = 3.5 A, 0.09 Ω, radial, pitch 2.5/5/10 mm, ø 14 mm max. (Kemet SBC8-101-242) Semiconductors D1 = MUR120G, DO-41 D2, D4 = STPS3150RL, DO-201AD D3 = Z-diode, 18 V, 1.3 W (BZX85C18) D5 = Z-diode, 5.1 V, 0.5 W (1N5231B) LED1 = LED in pushbutton S1 LED2 = LED, green, 3 mm IC1 = MC34063, DIP-8 IC2 = LM4040BIZ-5.0/NOPB, TO-92 (TO-226AA-3) IC3 = TL051CP, DIP-8 T1 = BC327.25, TO-92 T2 = STP40NF10L, TO-220 T3 = IRF9510PBF, TO-220 T4 = 2N7000, TO-92 Others K1, K2, S1, S3 = 2-way screw terminal block, LS 3.5 mm, max. 1.5 mm² connected to K1 = USB-C socket, 30 V/3 A, chassis mounted, wired, 9 x 16 mm connected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, red (Multicomp 24.102.1) connected to K2 = Banana Connector, 2 mm, Socket, 60 VDC, Panel Mount, black (Multicomp 24.102.2) Test clip, red, 30 VAC/60 VDC (Hirschmann 931467101) Test clip, black, 30 VAC/60 VDC (Hirschmann 931467100) S1 = Pushbutton, panel mount, SPST-NO, 30 DC/100 mA, with red LED S2 = Rotary Switch, 6 position, 2 pole, 30°, 250 V/150 mA S3 = Toggle switch, panel mount, SPDT, solder lugs, 28 VDC T2, T3 = Heat sink, 15°C/W, FK 214 SA-CB Enclosure Hammond 1591XXSSBK, ABS, 110 x 82 x 44 mm Knob for S2, round shaft 6 mm, ø 21 mm, with indicator line (Multicomp CP-LB21-6-6D) 4 x Self-tapping screw #4-1/4", carbon steel, pan head Banana plug, red, 2 mm, 60 VDC (Multicomp 25.205.1) Banana plug, black, 2 mm, 60 VDC (Multicomp 25.205.2) Banana socket, black 4 mm, panel mount Banana socket, red 4 mm, panel mount for LED1, LED2 = Pin header, 1 x 2, vertical, pitch 2.54 mm for LED1, LED2 = Pin socket, 1 x 2, vertical, pitch 2.54 mm for T2, T3 = M3 screw, 10 mm, steel, pan head 2 x M3 washer, plain, steel 4 x M3 nut for IC1, IC3 = DIP-8 socket Wire, black, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m Wire, red, 0.25 mm² (24 AWG), stranded 14 x 0.15 mm, 1 m PCB 250772-1 v1.1 Links Article Elektor Labs

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