Cube777
0
- Joined
- Jul 22, 2012
- Messages
- 426
- Points
- 28
Hi LPF, I built a dummy load and done some preliminary tests (don’t have driver yet) with a battery. The battery’s voltage is 7.65 volts and I was doing some test for a 650nm diode (4 diodes in series). When I tested the dummy load and read the voltage in mV on DMM across the 1 ohm resistor it gave me only 700mV??? Is this normal, is it because I used a battery instead of a driver? I got the circuit from bobhaha’s “How to build a selectable dummy load” tutorial and I use 1N4001 diodes and a low tolerance 0.5 watt resistor. Any help would be appreciated!!!!
Circuit (component side):
Solder joints:
Circuit (component side):
Solder joints: