Dimmer or Potentiometer for LEDs
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Dimmer or Potentiometer for LEDs
Hi, i am looking to generally have the facility to dim the different area's of the layout of things like street lights on one, buildings on another & wondered if i am best dimming the 240v transformer side or preferably via a Potentiometer on the 12v side. If on the 12 volt side, what sort of ohmage size would i need to cover each area on any one circuit, there could be between 10 & 30 leds 3mm & 5mm. Or would something like this speed controller work ok?
https://www.ebay.co.uk/itm/1pcs-PWM-DC- ... SwCrtcc5NU
Thanks
Mod edit. Title amended.
https://www.ebay.co.uk/itm/1pcs-PWM-DC- ... SwCrtcc5NU
Thanks
Mod edit. Title amended.
Last edited by collectors on Sat Mar 23, 2019 2:25 pm, edited 1 time in total.
- teedoubleudee
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Re: Dimmer or Potentiometer for LEDs
That should work but watch the total current draw of the leds.
Most people are shocked when they find out how bad I am as an electrician
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Re: Dimmer or Potentiometer for LEDs
Thanks, Odley enough, i found one with a very similar spec at 5amp instead of 2. So ordered the 5amp ones
Re: Dimmer or Potentiometer for LEDs
On mine I used a veritable voltage module that can go from 3 to 12 volts so because they all have a resistor attached will turn them from full to off.
It worked well for me.
Will try and find a link to the one I used.
Paul
It worked well for me.
Will try and find a link to the one I used.
Paul
Re: Dimmer or Potentiometer for LEDs
This is the one I used https://www.ebay.co.uk/itm/LED-display- ... 3590832365
- teedoubleudee
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Re: Dimmer or Potentiometer for LEDs
Just to make sure that others don't get confused, this, as you said in post #4, is a step down voltage regulator not to be confused with the PWM module linked to in the OP's opening post. Whereas this provides a linear (straight line) DC output, the former's output is a square wave that is adjusted by Pulse Width Modulation (PWM) by varying the on/off cycle duration which is then interpreted by the load (usually a motor) as an "average" DC level. I only add this as the two modules may look similar to the uninitiated.Paul-H wrote: ↑Sun Mar 24, 2019 9:03 am This is the one I used https://www.ebay.co.uk/itm/LED-display- ... 3590832365
Most people are shocked when they find out how bad I am as an electrician
Re: Dimmer or Potentiometer for LEDs
I power my ‘station’ lights etc from the twin speed knob outputs of an old analogue controller. If you happen to wire them up backwards then its a simple fwd/rev swtich over to fix it.
- Walkingthedog
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Re: Dimmer or Potentiometer for LEDs
Varied answers as expected, but for what it’s worth I use PWMs similar to this linked in post #1. Can be used for fine control of turntables as well.
"Not very stable, but incredibly versatile."
- Walkingthedog
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