I have been building electronic projects as a hobby for about 35 years. I etch my own pcb where needed and while I don't write code, i have been programming pic and avr's for about 15 years. However, I am relalively new to Arduino.
I have successfully uploaded sketches to pro mini's but recently tried to upload a couple of sketches to ATtiny45 and 85 chips but am having issues. One of the sketches was written for both pro mini and tiny85, no issues with pro mini version. I am using all the same gear with 85 as pro mini.
The problem seems very inconsistant, I mostly get verification issues. sometimes sketch will upload but when it does timing is slow. With one of the 2 projects sketch has uploaded correctly maybe 2 times out of 100. The same thing happens with 2 different, but similar projects that use tiny. I have tried different pc, chips, IDE version. The only same hardware would be the usbasp, but I have no issues uploading sketcches to pro mini's with it.
Projects are ppm gernerator/reader related.
Could it be something to do with board manager.
Please help, it would be much appreciated.