Paradisetronic.com USBasp 3.3V 5V Programming Device (incl. ISP Adapter and Cable), USB ISP Programmer for Atmel AVR and more

Works. Need to install driver using ZADIG (zadig.akeo.ie/). I had to use the 'libusbK (v3.1.0.0)' driver to work on Windows 11.

First time I plugged it in my Mac reported a USB error and shutdown all my USB ports!After some time with a magnifying glass I found a tiny solder bridge between 5V and Ground. After breaking that and checking all the other soldering (everything else was OK) it then worked.It is my go to programmer for working with various ATmega based boards at both 3.3V and 5V. But if you buy one you'd better check out all the soldering!I also added a header to JP3 which can be jumpered to program super slow - only needed when programming blank ATmega's and then only if you can't slow down programming in software (e.g. avrdude -B3 ...)

This isn't compatible with Atmel and is not "USBASP". The USBASP driver does not recognise the device. When plugged into a Linux machine, no USB port comes up. Complete waste of time and money. Apparently, it is compatible with some Chinese GUI tool...