I also added another LED to the ATtiny PB0 (pin 5) in order for quick debugging, but if you don’t need or want it, just ignore it. I used a piece of prototype board to assemble a JeonLab mini v1.3, 6pin male header for the FTDI basic board (Sparkfun), 3 indicating LEDs, a 8pin DIP socket, and a ceramic resonator for ATtiny (if you are using internal oscillator, you don’t need it). Here is an example with JeonLab mini v1.3. You will need a JeonLab mini or Arduino or any Arduino compatible board with FTDI USB interface. One missing note from High-Low Tech Group is that you need to add a 110-120 ohm resistor between VCC and Reset pins of JeonLab mini (or Arduino) to prevent Auto reset on serial connection as explained in here and here. The idea has been adapted from High-Low Tech Group and. I’d like to share how I program ATtiny85 with JeonLab mini 1.3. Both of them work very well with WinAVR (AVRdude). One of the popular device is USBtinyISP and DASA. For relatively small (less number of pins than ATmega328) project, ATtiny series, ATtiny45 or Attiny85 are good choice in terms of its physical size (8-DIP or 8-SOIC) and low power consumption.
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