Use a fuse on circuit input!
Simple Dummy Load
This is a simple dummy load that gives almost constant-current
performance. It took about a minute to solder together and made an excellent
adjustable dummy load for testing the circuits up to about 300mA.
Use a 4.7 ohm 5w resistor if you need a load up to 700mA, I just soldered
a 10 ohm resistor across the other resistor to give both ranges.
Any big NPN transistor should work.
Variable constant current dummy load;
(requires +5v regulated supply also).
+5v --------, |
| | NPN
500 ohm R C TIP3055
pot R<----B 10A 80v
| Rload 8.2 ohms 5w
| | (or 4.7 ohms 5w)
- end -
[Back to Home Page]