Recent content by Bruce Ratcliffe

The speaker still works. I THOUGHT that I'd figured out how to install the big 25 A FWBR's. I tried a much smaller (~2 A FWBR) and it did NOT work. So I started a production run--retrofitting each of my swithces with the 25A FWBR. The first pair (2 per car) went fine. But when I did the...

Dear Baluncore, I was daunted by the 110 F yesterday, so stayed home, which allowed me to finish creating a solution to TOO HOT: Well, I've just completed the first FWBR addition to one of the drill swithes. Each eCar is operated by a driver that brakes, accelerates and steer by controlling...

AH! Glad to hear the good news! Thanks for your help. Bruce

Excellent! I have a box full of big, beefy FWBR's! What value on the ceramic capacitor would you recommend?

Here is the spec plate on the momtor. NOw that you mention it, it DOES have forward and reverwse modes. This would seem t make problems with a diode--wouldn't 1 of the 2 diodes always be condecting current AROUND the motor?

AIE! I've been having my kids build these "eCars" for 20 years, but I never looked closely at tahe motors. I can tell you there are out of wheelchairs. There are large curved permanent magents on the insides of the motor housing and there are brushes on opposides sides of the motor housing...

Dear Baluncore, I went to my goto source (Youtube) and found a video that addresses my concern. The video what quite educational, but I'm still unsure exactly WHERE to solder in the diode. My guess would be to connect it across the wires going to the motor, with the negative pole of the...

AH! I've seen diagrams with a diode that does that exact job. That would be much easier than sticking a capacitor in there. My problem now: I'm not educated enough in diodes to know what size, what polirity, and where in the circuit it should go. If you could "educate" me in that regard...

My students build "eCars" that use wheelchair motors and two 12 volt AGM lead acid batteries in series. A pair of Bosch 25Amp, 24 VDC, drill switches control power to each wheel. Tons of fun (see here): The switches last in some cases for years, but quite a few have burned out the "variable"...