On Wed, 2011-10-05 at 14:03 +0100, andy pugh wrote: > I have a requirement for a small and simple and cheap DC motor H-bridge. > Input will be +/-10V (or 0-10, or +/-5) from an existing controller > (actually an engine dyno) and the output needs to drive a 12V DC motor > from a 12V supply at a few amps > (it's a windscreen wiper motor). > > Does anyone know of a suitable product? > > Cheap would be good. > Hi Andy, You could use the output stage of this project I designed. Very few parts needed, but the power op amp is expensive. I was able to get a few as samples for the prototypes. I used a split supply to make the servo board cheaper (its a half bridge), and the common power supply more complicated. For a wiper motor, a supply of +-18v is very easy to make by taking a standard analog 12v supply and replacing the 2 diode full wave rectifier with a bridge and adding another filter cap for the negative rail. By the way, I was using car heater fan motors as brushed servo motors by adding an encoder.
http://www.members.shaw.ca/swstuff/dspic-servo.html cheers, Lawrence VE7IT ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
