I have just purchased two dev boards like this
I have a number of attiny 45's
most of them just light the left led on the board when plugged in , one lights both leds (a solid light, no flashing) but both boards show a box just above the task bar that says
usb device not recognised
every time I plug one in.
Is there any way to tell if this is two duff boards or duff chips?
I have all the software in the ide for attiny microcontrollers and did manage to program one chip using a board I made up that straddled the uno pins a while ago (the chip that lights both leds) but I don't know where the board is now?