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ISP adapter for ATTiny/ATmega
This is an adapter board to connect an ISP programmer with 6-Pin connector (like the Atmel AVR ISP mkII) to the MCU to be programmed. Supported are
- ATTiny 25/45/85 (V), as used in TV-B-Gone
- ATMega 8/168/328, as used in Arduino
- possibly others (check datasheets)
It is needed for circuits that do not come with an ISP connector, like the TV-B-Gone bike light mod.
Parts list
- circuit board:
- IC2: 8-pin IC socket
- 4.00 or 8.00 MHz ceramic oscillator
- C1: 100 uF capacitor
- D1: 1N4148 diode
- R1: 10k resistor
- SV1: 6 pin header, shrouded is nice put not strictly necessary
- X1: terminal block connector, the piece in the diagram is named "WAGO 500", but as you can see i don't have it
- IC1: 28-pin IC socket
- another ceramic oscillator
The last two parts, and the corresponding part of the circuit board, can be left out if you only want to program ATTiny; in this case, you need to solder the red top-side wire W.
Power supply is 4-5 Volt, 3 Volt should work with the "V" (low Power) variants, might not work with others.
The 4-pin connectors JP1 and JP2 are intended to connect an 8-pin SOIC test clip (digikey.com) to program the SMD variant of the ATTiny.
If you don't want to etch a PCB, you can wire it up on a stripboard, which is pretty simple, but doesn't look as nice :)
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se-it.eu, July 28, 2014