24VAC dimmer

Thread Starter

flyingace0072001

Joined Mar 28, 2014
2
Any ideas how to best control an output load requirement to 13VAC at 300mA when the input varies from 16VAC to 30VAC depending on the connected transformer winding ratio and location in the country? I want to to come up with a circuit that does not require a PWM signal, just basic components like an SCR, triac, zener diodes, etc.
 

Thread Starter

flyingace0072001

Joined Mar 28, 2014
2
The product needs around 13vac at 300mA to operate properly and it could be installed on nominal 24vac systems throughout the country that could have voltage variants from 16vac to 30vac. Regardless of the input ac it needs to provide 13vac out.
 

THE_RB

Joined Feb 11, 2008
5,438
Why does the product require AC 13v 300mA?

It is most likely the very first thing inside the product itself will be a bridge rectifier and filter cap, to make that 13v AC into DC.

If you provide full information instead of just part of the information people can help you much better.

So we need to know, WHAT is the product?
:)
 

inwo

Joined Nov 7, 2013
2,419
Any standard inverter design should work.
Regulating the input voltage should be easy enough at your low current levels.

Use appropriate transformer secondary. ie 13vac
 

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Bernard

Joined Aug 7, 2008
5,784
Variable AC output transformer, CAT# SC-3M, All Electronics, 110V in,[ 60 HZ] 0-130V out @ 3A, US $ 64. Only problem reported-meter accuracy. Might find one cheaper but not at Mouser or Digi-key.
 

#12

Joined Nov 30, 2010
18,224
Apparently the problem is to input anything from 16 VAC to 30 VAC and correct it to 13 VAC. A Variac won't do that all by itself. It will need some feedback circuitry.

Still, the question is vague enough that nobody wants to try designing a circuit with so many variables.
 

Bernard

Joined Aug 7, 2008
5,784
Feedback present; knob- hand- meter-eyeball. Might be different Vs are just at differens sites, not variations at a individual site??

Lots on ebay, $ 8.99 to $1,ooo's, first choice, Gen. Radio, W5MT3, around $ 40.
 
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THE_RB

Joined Feb 11, 2008
5,438
It's probably just some standard DC device that just happens to have a label spec of "13v AC".

But the OP seems to have skipped out on us?
 
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