Hi Guys
I found this circuit online. I'm driving it with a Honda EU2200i generator [12v - 8.3A unregulated DC output]. Being unregulated, the voltage changes as the load on the generator changes so I'm wanting to regulate the output to a consistent 12V DC. The generator output is a sine wave that cycles between 0V to 18V.
I used a 680 microfarad capacitor from Vout to ground to smooth (I hope that is correct).
The 4k7 in diagram was replaced with a variable resistor. I did not use the 6a4 diode.
I built circuit and it works great with low amp loads (e.g. a few LED lights).
I then tried a 50W light bulb but the output voltage dropped from 12V to around 1V. The voltages at "1" and "2" also dropped significantly.
I was expecting the 2N3055 to isolate the LM317 from the higher current draw, so why does the voltage drop so dramatically?
Thanks
I found this circuit online. I'm driving it with a Honda EU2200i generator [12v - 8.3A unregulated DC output]. Being unregulated, the voltage changes as the load on the generator changes so I'm wanting to regulate the output to a consistent 12V DC. The generator output is a sine wave that cycles between 0V to 18V.
I used a 680 microfarad capacitor from Vout to ground to smooth (I hope that is correct).
The 4k7 in diagram was replaced with a variable resistor. I did not use the 6a4 diode.
I built circuit and it works great with low amp loads (e.g. a few LED lights).
I then tried a 50W light bulb but the output voltage dropped from 12V to around 1V. The voltages at "1" and "2" also dropped significantly.
I was expecting the 2N3055 to isolate the LM317 from the higher current draw, so why does the voltage drop so dramatically?
Thanks