This page contains the (relatively unchanging) information about v0.1 of the SARduino328 board.
Bill of Materials
||Microcontroller (or ATmega8 or ATmega168)
||Pullup resistor for RESET switch
||Oscillator (or 16MHz Ceramic Resonator, omit C1,C2)
||Capacitors for Crystal (match required value)
||Bypass capacitors for MCU, consider putting right at 5V/GND and A+/GND pins instead of labeled positions
||6-pin FTDI cable programming connection (optional)
||6-pin ISP programming connection (optional), shrouded or bare
||3-pin power selector (external or USB)
|External Power Supply Option:
||Input protection diode (e.g., 1N4001 or 1N4004)
||External Power Jack
||5V Regulator (any IN-GND-OUT should work, or 3V3 if you want that)
||Power Supply Filter Caps
- The reference designators are all jacked up on this one.
- Most passives are not labeled by value on the PCB.
- There is no cap on the reset line from the FTDI to support auto-reset.
- Some extra power and ground rails would be nice for prototyping.
- It would also be nice to have a pad for raw external VIN, in case we’re not using a 2.1mm jack.
- C4 and C5 are really bypass caps for the microcontroller, and should be as close to the VCC pins as possible. Omit from marked placement, and instead put right across power/ground pins on each side of the microcontroller.