enable button (this is the green button
in Figure 9, the completed project) and
after a brief beep, the message in the
middle section of Figure 8 will appear.
The current shown will depend on your
actual load. Verify that all outputs have a
If you have a low valued power
resistor that will cause the load to increase above three
amps, connect it to the fixed output. The buzzer will start
beeping and the bottom section in Figure 8 will appear.
Pushing the button again will revert back to the middle
screen and disable all outputs. That’s it, you have
successfully completed the project!
One final note: Since the fans will not be running
continuously, you don’t need premium-grade fans. I got
mine at a surplus web vendor, for about $6 a pair.
However, if your supply does not require the fans, you can
omit them, sensor U6, and also header J2 for a savings of
about $15. Feel the power! SV
SERVO 06.2010 47