Hi, this might not be electrical engineering, but I found no other forum to question about this. I'm trying to get a 5V regulated power supply from a 12V, 300mA transformer. I can't seem to get it to work. I'm using a 5V regulator, two 470 microfarad capacitors and electronic wire in a solderless breadboard. From the 12V transformer I measured 12.30 volts once it was plugged in. Probably it became more because I snipped off the connector and some copper wire. I plugged the negative lead of the transformer into the bottom strip of the breadboard, and the positive lead into the F4 socket. I'm trying to get the regulated 5V power on the top strip of the breadboard. This is my current configuration: J4,5,6 = 5V regulator chip (input, ground, output) I6 to top strip = wire F1 to E3 = wire A3 to bottom strip = wire A7 to bottom strip = wire E5 to F5 = wire E7 to F6 = 470uF capacitor G1 to G4 = 470uF capacitor F4 = positive 12V lead from transformer Bottom strip = negative 12V lead from transformer When I put test leads into the bottom strip and any socket on row 4 I get 12.30V, but when I put test leads into the bottom strip and the top strip I get 10V which climbs steadily by hundredths. I'm not sure what that means, but I want a 5V regulated voltage on the top strip. Can you please help me on how to do this?