AVR Doper HVSP problem. Can't get 12 volts
Posted: Sun Mar 01, 2009 10:08 pm
Hello. I can't get 12 volts after D3. It's only around 4.5 volts. T2 base voltage is around 0.6 volts which is ok as I read from previous posts. And T2 gets really hot when I plug in the thing to USB of my computer. At some older posts some other guy also had a similar problem like mine and resolved it but he hadn't explained how.
I was thinking of debugging this problem step by step. So I'd like to ask if it is ok to build only the boost up portion of the circuit (+5v, inductor, T2 and its 10k resistor, diode and 2 capacitors and nothing more) to see if I am able to get 12 volts like this. And so I'd like to learn what type of switching signal do I have to apply to the 10k resistor of T2?
![Image](http://img218.imageshack.us/img218/844/avrdoperschematics.th.png)
I was thinking of debugging this problem step by step. So I'd like to ask if it is ok to build only the boost up portion of the circuit (+5v, inductor, T2 and its 10k resistor, diode and 2 capacitors and nothing more) to see if I am able to get 12 volts like this. And so I'd like to learn what type of switching signal do I have to apply to the 10k resistor of T2?
![Image](http://img218.imageshack.us/img218/844/avrdoperschematics.th.png)