General > General Technical Chat
digitally controlled potentiometer? I got this!
Ian.M:
It would probably have been much simpler to vary the boost converter output voltage by injecting current at its controller's feedback pin to offset the feedback voltage. Filtered PWM from your MCU fed via a resistor to that pin could sweep the output from a little above that set by the feedback divider down to the input voltage as you increase the duty cycle.
OTOH that's boring and wouldn't have provided much needed amusement on a bank holiday!
pardo-bsso:
--- Quote from: Galenbo on September 06, 2015, 11:31:11 am ---
--- Quote from: amyk on September 05, 2015, 12:20:16 pm ---Search "motorised rheostat" and you can find some very high-power ones, used in industrial control applications:
http://www.micronor.com/products.php?product_id=248
--- End quote ---
The word makes me think of the "actuator" that controls the throttle of a Diesel engine in a 1000kVA UPS/GenSet.
--- End quote ---
You also find them in old (and not quite) xray power supplies. At least I did when servicing crystallography equipment. Many of them were all vacuum tube and the servo arrangement was very clever.
Kim Christensen:
When I saw OP's avatar and the top part of the image, I thought I was on a different forum and was going to see "a digitally controlled potentiometer landed on the Mun" or something.
Bud:
Motorized linear actuated pots were a thing in professional audio mixing gear back then, weren't they ?
themadhippy:
Cunning solution.similar to the old rc car,no complicate electronics, speed controllers
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