anarchist59
Member
I am using 70 volts cree cxa3590
With 2 in series. You have 140 volt
With an old seperate transformer. Rectified you have. 115ac x 1.4 = 161 volts dc
Thats a good basis to build a constant current source
All you need is an op lm358 a reference lm339 power transistor with heat sink
A few resistors and caps thats it.
It is more stable than the meanwhile stuff
With 2 in series. You have 140 volt
With an old seperate transformer. Rectified you have. 115ac x 1.4 = 161 volts dc
Thats a good basis to build a constant current source
All you need is an op lm358 a reference lm339 power transistor with heat sink
A few resistors and caps thats it.
It is more stable than the meanwhile stuff