Here’s a handy trick I developed while searching for ways to reduce the cost and assembly time of Floppy Emu boards. The board has space for a 3 x 2 shrouded IDC header, where the AVR ISP cable should connect. But that connection is only needed once, the first time the AVR is programmed – all future software updates are loaded from the SD card using the bootloader. So why waste 75 cents and 30 seconds of soldering on a part that’s only ever going to be used once? It’s a small saving, I admit, but those savings add up.