I've build the mbhp pic burner on a breadboard but can't get it to work. When applying power, all three leds light up and the voltage at J2 slowly drops. After about 10 seconds the red Vpp led hesitates for a second and switches off, and a second later the other leds start to flash in sync once a second or so, and during the flashing the voltage at J2 jumps up and down. But when the measuring at J2 without the rest of the circuit connected, the voltage is nice and stable. I've checked all the connections a thousand times and exchanged components... I'm almost going nuts by now... ??? I haven't got the knowledge of electronics to troubleshoot this myself. Does anybody have some suggestions to try and get this burner to work?