Using nano clone as an ISP on a breadboard- as shown here - http://www.martyncurrey.com/arduino-nano-as-an-isp-programmer/
Previously, it worked great. However, recently, chips that I have bootloaded and programmed have, when added to the breadboard for reprogramming, caused the USB connection to drop. The heartbeat LED on the nano also dims slightly which makes me wonder if it's a power issue?
Either way, this means that I can't program the chip.
Does anyone know how to fix this? The breadboard circuit will happily program new chips.
The programs on the chips that aren't working often include blink on pin 19 on the DIP chip (D13) - and when I disconnect the link from this to D13 on nano, the USB connection is restored.
But otherwise I am very confused, have got about 7 chips with the same issue and would be great to fix it.