Motor Controllers | Electronic Project Circuits

Posts Tagged ‘motor controllers’

H-bridge motor driver by TIP120,TIP125

This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first. Using bigger parts could make it more powerful. Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn’t use exotic parts.

Read More Source:http://www.bobblick.com/techref/projects/hbridge/hbridge.html
Thank You.

Be the first to comment - What do you think? Posted by admin - February 22, 2008 at 11:35 pm

Categories: Electronic Control, Motor controller Tags: dc motor driver, H-bridge, motor controllers

PowerSmart Solar Speeder Motor by 2N3904

This must be the most efficient bipolar transistor motor driver design for this application and I recommend it for the solar roller competitions. A 1381E is used to trigger at 2.4V. While it takes a total of 10 components plus motor compared to the stock circuit’s 6 components, you will clearly get better performance compared to a stock Solar Roller/Speeder circuit.

Mini Zener-based solar engine by 2N3904

The capacitor charges until the PNP transistor (here shown as a 2N3906, but you could also use a BC327) receives base current through the Zener and turns on. Then the NPN transistor (here shown as a 2N3904, but you could also use a BC337) turns on and the capacitor is discharged through the motor. As the NPN turns on the 2.2K resistor starts to supply base current to the PNP and the circuit snaps on. When the capacitor voltage drops below about 1V, the the PNP turns off, the NPN turns off and disconnects the motor from the capacitor which starts to charge up again.