DIY AVR HVSP high voltage serial programmer for attiny

Made a easy to build and use high voltage serial programmer to program attiny projects that also use the reset pin for GPIO.
This prototype was made using:
Atmega32U4 Beetle
12V DC-DC converter module with enable
red LED and some resistors.
Github:
github.com/MrB...
OSH Park PCBs:
oshpark.com/sh...

[@thanatosor]

This was the most compact version that I can find on HVPP

[@emaitch]

Where did you get the DC-DC converter? I have the OSHpark boards but am having difficulty finding the converter! (I can hack in other types, but for neatness I'd like to use the same one!). Thanks for a great project!!!

[@MrBlinky]

Nice to see you're building one. I got them from aliexpres www.aliexpress.com/item/32909002977.html