Examining the low ‘minified’ ATtiny85 chip, this provides a cut down version of the Arduino; using much less current and only about £1 in cost.
I connected up the ATTiny to an Arduino to burn the bootloader – this allows other programs to be loaded up afterwards. I also made a harness – dedicated, soldered circuit to simplify future programmingof the ATTiny without wiring up a breadboard each time.
Once the bootloader is loaded, I upload the ‘Blink’ sketch to prove it works.
Here is the pcb I made to program the ATTiny, it plugs on top of the Arduino.
underneath! Filed down solder to make a good connection to Ardiuino…
And Attached 3 LEDs to blink
Schematic for programmer shield