Sunday, May 3, 2009

Minty Fresh Power Supply

I put together a small 5 Volt power supply for the ammeter in my instrument gauges. It also supplies 12 Volts to the temperature sensor. The voltage regulator requires a heatsink, and I used a scrap of Al. plate. Everything is housed in an Altoids tin for some environmental protection.

With this power supply and the other electrics wired on the bike, the gauges are ready to go into the bike...

And I'll be damned, they work!!! The red display is the battery pack voltage, and the green display shows the amount of current flowing through the pack. The cool thing is that these work in real time, so when you twist the throttle, the current goes up and the voltage drops. Very cool.