I am working (?) on the design of a Variable DC Pulsed HO train power controller with adjustable PW frequency, and Pulse width, Amplitude controls. Any suggestions and Snarky remarks appreciated. (BSEE, 1974, Retired, now an HO Steamer !).
to the Forum. Your posts get delayed in moderation for a bit. If you can only manage 5 posts in 10 years, it will be longer than a bit.
I am no longer a DC guy, but keep your eye out for Atlantic Central -Sheldon
Henry
COB Potomac & Northern
Shenandoah Valley
Our sadly, now deceased, electronics expert, Randy Rinker often referenced the Paisley circuits.
Here's a start:
http://www.circuitous.ca/Throttles.html
Good Luck, Ed
BigDaddyIf you can only manage 5 posts in 10 years
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Chew-Choo Richard adjustable PW frequency, and Pulse width, Amplitude controls.
a constant frequency PWM throttle are very common. i built a very simple one using an LM324 and mosfet driver with a reversing switch
many DCC decoders use PIC processors that have PWM outputs driving an h-bridge allowing electronic reversing
while i was told that PWM at low frequencies can be harmful to motors, higher frequencies, 200 kHz is fine. variable amplitude is more difficult. a variable DC output with a pulse to overcome stiction as done in the TAT-IV isn't common
you might consider using a relatively small arduino nano or micro with it's PWM output as well as other features to drive a mosfet. it could be controlled by either reading a pot or use buttons to control the speed
greg - Philadelphia & Reading / Reading
maxman?
Every once in a while you see a guy who has been in the forum for a decade make is third or forth post. You and I would never be that guy.h