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The Challenger RP2040 WiFi is a small embedded computer equipped with a WiFi module, in the popular Adafruit Feather form factor. It is based on an RP2040 microcontroller chip from the Raspberry Pi Foundation which is a dual-core Cortex-M0 that can run on a clock up to 133 MHz. The RP2040 is paired with a 8 MB high-speed flash capable of supplying data up to the max speed. The flash memory can be used both to store instructions for the microcontroller as well as data in a file system and having a file system available makes it easy to store data in a structured and easy to program approach. The device can be powered from a Lithium Polymer battery connected through a standard 2.0 mm connector on the side of the board. An internal battery charging circuit allows you to charge your battery safely and quickly. The device is shipped with a programming resistor that sets the charging current to 250 mA. This resistor can be exchanged by the user to either increase or decrease the charging current, depending on the battery that is being used. The WiFi section on this board is based on the Espressif ESP8285 chip which basically is a ESP8266 with 1 MB flash memory integrated onto the chip making it a complete WiFi only requiring very few external components. The ESP8285 is connected to the microcontroller using a UART channel and the operation is controlled using a set of standardized AT-commands. Specifications Microcontroller RP2040 from Raspberry Pi (133 MHz dual-core Cortex-M0) SPI One SPI channel configured I²C One I²C channel configured UART One UART channel configured (second UART is for the WiFi chip) Analog inputs 4 analog input channels WLAN controller ESP8285 from Espressif (160 MHz single-core Tensilica L106) Flash memory 8 MByte, 133 MHz SRAM memory 264 KByte (divided into 6 banks) USB 2.0 controller Up to 12 MBit/s full speed (integrated USB 1.1 PHY) JST Battery connector 2.0 mm pitch Onboard LiPo charger 250 mA standard charge current Onboard NeoPixel LED RGB LED Dimensions 51 x 23 x 3,2 mm Weight 9 g Downloads Datasheet Design files Product errata

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RTL-SDR is an affordable dongle that can be used as a computer-based radio scanner for receiving live radio signals between 500 kHz and 1.75 GHz in your area. The RTL-SDR V4 offers several improvements over generic brands including use of the R828D tuner chip, triplexed input filter, notch filter, improved component tolerances, a 1 PPM temperature compensated oscillator (TCXO), SMA F connector, aluminium case with passive cooling, bias tee circuit, improved power supply, and a built in HF upconverter. RTL-SDR V4 comes with the portable dipole antenna kit. It is great for beginners as it allows for terrestrial and satellite reception and easy to mount outdoors and designed for portable and temporary outside usage. Features Improved HF reception: V4 now uses a built-in upconverter instead of using a direct sampling circuit. This means no more Nyquist folding of signals around 14.4 MHz, improved sensitivity, and adjustable gain on HF. Like the V3, the lower tuning range remains at 500 kHz and very strong reception may still require front end attenuation/filtering. Improved filtering: The V4 makes use of the R828D tuner chip, which has three inputs. The SMA input has been triplexed input into 3 bands: HF, VHF and UHF. This provides some isolation between the 3 bands, meaning out of band interference from strong broadcast stations is less likely to cause desensitization or imaging. Improved filtering x2: In addition to the triplexing, the open drain pin on the R828D can be also used, which allows to add simple notch filters for common interference bands such as broadcast AM, broadcast FM and the DAB bands. These only attenuate by a few dB, but may still help. Improved phase noise on strong signals: Due to an improved power supply design, phase noise from power supply noise has been significantly reduced. Less heat: Another advantage of the improved power supply is low power consumption and less heat generation compared to the V3. Included 1x RTL-SDR V4 dongle (R828D RTL2832U 1PPM TCXO SMA) 2x 23 cm to 1 m telescopic antenna 2x 5 cm to 13 cm telescopic antenna 1x Dipole antenna base with 60 cm RG174 1x 3 m RG174 extension cable 1x Flexible tripod mount 1x Suction cup mount Downloads Datasheet User Guide Quick Start Guide SDR# User Guide Dipole Antenna Guide

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ANT500 from Great Scott Gadgets is a telescopic antenna designed for operation from 75 MHz to 1 GHz. Its total length is configurable from 20 cm to 88 cm. ANT500 is constructed of stainless steel and features an SMA male connector, rotating shaft, and adjustable elbow. ANT500 is a 50 ohm general purpose antenna. It is the perfect first antenna for use with HackRF One/Pro.

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You can use RF Explorer 3G Combo equally well outdoor and indoor, and you can also connect it to a PC for extra functionality using standard mini-USB 2.0 connector. This model includes a WSUB1G baseline unit plus an RFEMWSUB3G Expansion Module conveniently assembled and tested. It comes with two SMA connectors and two antennas,a dual band telescopic 144 / 430 MHz antenna for all Sub-GHz frequencies and a whip helical antenna for 2.4 GHz band. Additional, specific band antennas may be needed to cover efficiently some of the frequencies supported. The combination of these two models offer the wide band coverage of the WSUB3G module, together with the highest sensitivity and quick response of the WSUB1G model for the popular sub-1GHz frequencies. Features Pocket size and light weight Solid aluminum metal case Includes a transport EVA carry case for RF Explorer Spectrum Analyzer mode with Peak Max and Hold, Normal, Overwrite and Averaging modes Lifetime free firmware upgrades available, open to community requested features High capacity Lipo for 16 hours+ of continuous run, rechargeable by USB Windows PC client Open Source Can be extended with internal Expansion Modules for additional band and functionality Wide band coverage to all popular RF frequencies, starting at 15 MHz and going up to 2.7 GHz. This includes very interesting frequency areas such as 2 m HAM radio, all VHF and UHF, FM radio, GPS, WiFi and WiMax, Bluetooth, etc. Firmware: RF Explorer 3G Combo is delivered with upgraded firmware v1.09. Note some of the features and operation accuracy will be improved in upcoming free firmware revisions. Specifications Battery Lithium Cells / Batteries contained in equipment UN3481 - PI967 Frequency band 15-2700 MHz Frequency span 112 KHz - 600 MHz Graphics LCD 128 x 64 pixels, great visibility outdoors PC Windows client supports Windows XP/Vista/Win7 both 32 and 64bits Backlight for great indoor visibility 2 standard SMA 50 ohms connector, one for Sub-GHz wideband Nagoya NA-773 telescopic antenna included and another 2.4 GHz one for 15-2700 MHz band with helical antenna included. Amplitude resolution 0.5 dBm Dynamic range Left SMA port (WSUB1G) -115 dBm to 0 dBm Right SMA port (WSUB3G) -110 dBm to -10 dBm Absolute Max input power Left SMA port (WSUB1G) +5 dBm Right SMA port (WSUB3G) +30 dBm Average noise level (typical) -110 dBm Frequency stability and accuracy (typical) +-10 ppm Amplitude stability and accuracy (typical) +-6 dBm Frequency resolution 1 KHz Resolution bandwidth (RBW) automatic 3 KHz to 600 KHz Weight 185 g Size 113 x 70 x 25 mm Included RF Explorer 3G Combo Nagoya NA-773 wideband telescopic antenna 2.4 GHz band antenna EVA Case Documentation For more info and to get started with your RF Explorer, visit the start page. For questions and support, please visit https://support.rf-explorer.com

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Features Internal LNA amplifier and selectable attenuator Low frequency support from 50KHz covering LF, MF, HF, VHF and UHF up to 960Mhz New HELP and SET buttons to improve user interface and configuration selection with 2-clicks Wide band coverage to all popular sub-1Ghz bands, including FM, TV and DTV, ISM, RFID, GSM, etc. Ideal choice for HAM bands from 160meters to 33cm Pocket size and light weight Solid metal case Spectrum Analyzer mode with Peak Max and Hold, Normal, Overwrite and Averaging modes High capacity internal Lithium battery for 20hs+ of continuous run, rechargeable by USB Multi-platform Windows/Linux/MacOS Open Source software and API libraries Can be extended with internal Expansion Modules for additional band and functionality Specifications Frequency band: 0.05 MHz - 960 MHz Frequency span: 0.1 MHz - 960 MHz Internal selectable LNA 25 dB gain Internal selectable Attenuator 30 dB Graphics LCD 128 x 64 pixels, great visibility outdoors Support included for Windows, Linux and MacOS X Backlight for great visibility indoor Internal Lithium Ion 1800mA/h rechargeable battery Standard SMA 50 Ω connector Wideband 144/433MHz dual band telescopic antenna included UHF 400-900 MHz rubber duck articulated antenna included Amplitude resolution: 0.5dBm Dynamic range: -125 dBm to 10 dBm Absolute Max input power: +30dBm Average noise level (typical LNA): -125 dBm Frequency stability and accuracy (typical): +-10 ppm Amplitude stability and accuracy (typical): +-2d Bm Frequency resolution: 1kHz Resolution bandwidth (RBW): automatic 2.6 kHz to 600 kHz Included 1x RF Explorer WSUB1G+ Spectrum Analyzer 1x Mini USB cable 1x Dual band 144/430MHz Telescopic antenna 1x UHF 400-900Mhz antenna 1x EVA case

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This mini WiFi board has 16 MB flash, external antenna connector and built-in ceramic antenna based on ESP8266EX. Features 11 digital input/output pins Interrupt/pwm/I²C/one-wire 1 analog input (3.2 V max input) 16 MB Flash External antenna connector Built-in ceramic antenna CP2104 USB-TO-UART IC Specifications Operating Voltage 3.3 V Digital I/O Pins 11 Analog Input Pins 1 (3.2 V max) Clock Speed 80/160 MHz Flash 16 MB Size 34.2 x 25.6 mm Weight 3 g Pin Configuration Pin Function ESP8266 Pin RX RXD RXD A0 Analog input, max 3.2 V A0 D0 IO GPIO16 D1 IO, SCL GPIO5 D2 IO, SDA GPIO4 D3 IO, 10k Pull-up GPIO0 D4 IO, 10k Pull-up, BUILTIN_LED GPIO2 D5 IO, SCK GPIO14 D6 IO, MISO GPIO12 D7 IO, MOSI GPIO13 D8 IO, 10k Pull-down, SS GPIO15 G Ground GND 5V 5 V - 3V3 3.3 V 3.3 V RST Reset RST Included 1x Wemos D1 mini Pro (based on ESP8266EX) 2x Pin header (short) 2x Female connector strip (short) 2x Female connector strip (long)

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Features NFC chip material: PET + Etching antenna Chip: NTAG216 (compatible with all NFC phones) Frequency: 13.56 MHz (High Frequency) Reading time: 1 - 2 ms Storage capacity: 888 bytes Read and write times: > 100,000 times Reading distance: 0 - 5 mm Data retention: > 10 years NFC chip size: Diameter 30 mm Non-contact, no friction, the failure rate is small, low maintenance costs Read rate, verification speed, which can effectively save time and improve efficiency Waterproof, dustproof, anti-vibration No power comes with an antenna, embedded encryption control logic, and communication logic circuit Included 1x NFC Stickers (6-color kit)

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Features Build in USB to Serial interface Build-in PCB antenna Powered by Pineseed BL602 SoC using Pinenut model: 12S stamp 2 MB Flash USB-C connection Suitable to breadboard BIY project On board three color LEDs output Dimensions: 25.4 x 44.0 mm Note: USB cable is not included.

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