Re: [beam] Another mail by bas
- sebastiaan van Vliet wrote:
>I assume this is the 6-transistor H-bridge. Tilden suggests a minimum
> I'm having these problems with my walker: The motors run faster when
> I just hook them up to the batteries than they do with the H-bridges.
> Would lowering the resistors be an option? I changed one resistor with
> a potmeter to correct the bot from being limp. I use BC 640/BC639
50k resistor (in practical terms, that would be 47k). Increasing from
there will reduce the current flow to the motors. Right now, I'm using a
47k resistor with a 100k trimpot in series; that lets me equalize the
rotation of my gearmotors but also ensures that I don't get the
resistance too low.
>2N2907. I notice the more common designation now is PN2222 and PN2907.
> last Question: what was the one transistor to use in combonation
> with the 2N2222?