board fabrication

hello world board milled using CAD/CAM 1/64" bit used to clear 1/32" bit used to cut perimeter

hello world board parts tiny45

serial voltage limiter parts 4.7v zener diode 4.99k resistor This board makes it possible to program your board from USB. You need two USB to serial adapters, but you can also put a 9 volt battery on the power and ground of the four pin cable to power your board while you program it with the dasa cable; then, you simply switch the USB to serial to your 4 pin cable and listen to your board.

hello world board + serial voltage limiter both connected via USB using dasa cable python rx.py /dev/ttyUSB0 9600 avrdude -p t45 -P /dev/ttyUSB1 -c dasa -U flash:w:file.hex This is the board hooked to my Asus EEE. I had to install pyserial and pytk and avrdude, but it worked well. It does take a minute to write the program to the board, which is very slow compared to using the parallel port which is close to instant. (USB1) to (USB to serial adapter 1) to (dasa cable) to (attiny board) to (4 pin serial cable) to (USB to serial adapter 2) to (USB0) run the rx.py or term.py on USB0 run the above avrdude command on USB1