Universal User Interface Module
with LCD and SD card
Published in issue 384, December 2008
This module provides a simple user interface for extending microcontroller-based circuits. Graphics and text display commands can be sent to it over a serial interface, and, using its UART, the module reports back when the state of any of six inputs changes. Additional firmware can display a slideshow of images stored on an SD card.
Resistors
R2 = 10kO, SMD 0805
R3,R4,R5,R6,R7 = 150O, SMD 0805
R8 = 470O, SMD 0805
Capacitors
C1,C3,C4,C5 = 100nF, SMD 0805
C2,C6 = 2µF2, SMD 0805
C7,C8 = 22pF, NP0, SMD 0805
Semiconductors
D1, D2 = MBR0520L, Schottky, SOD-123 (Farnell # 1467521)
IC1 = PQ1T301M2ZP, voltage regulator (LDO), 3V, 400mA, SOT-23-5 (Digikey # 425-1674-1-ND)
IC2 = ATmega168-20AU, TQFP32 (Atmel
Miscellaneous
LCD1 = LM15SGFNZ07 (see text)
X1 = 7.3728MHz quartz crystal, HC-49 case
K1 = 10-way SIL pinheader, lead pitch 2.54 mm
K2 = SD card socket (Farnell # 9186158)
K3 = 6-way (2x3) boxheader, lead pitch 2.54 mm (Farnell # 1096984)
K4 = 6-way SIL pinheader, angled pins, lead pitch 2.54 mm
JP1= 3-way pinheader with jumper, lead pitch 2.54 mm
PC1,PC2,PC3 = solder pin, 1mm diameter
Enamelled copper wire, max. 0.5mm diameter
PCB, ref. 080320-1 from www.thepcbshop.com
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Click below to download a PDF copy of this article from Elektor magazine. Please note. In view of the complexity of international markets, Elektor cannot guarantee the availability of components for this project.
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