Category Archives: electronics

Instructions on building a lab power supply using a spare power supply from an old computer. Computer power supplies cost around $15, but lab power supplies can run you $100 or more! By converting the cheap (free) ATX power supplies … Continue reading →

hack a day has some basic instructions on building a portable USB charger powered by a 9-volt battery. This will allow you to recharge your portable device through its USB port when you don’t have access to a computer or … Continue reading →