Hello,

Can anyone suggest a simple way to step down 50v DC to 5v dc.

I designed a simple circuit with a single resistor, one transitor and one zener. But the problem with this is that if the zener gets short, my microcontroller circuit gets destroyed.

Was planning to use a DC to DC converter but since the numbers are small (20 no.s) and for cost considerations, I dropped this idea.

I crossed checked LM317 cannot be used here.

Any suggestions?

Rgds
Raj