EEVblog Electronics Community Forum

Electronics => Beginners => Topic started by: rthorntn on April 18, 2022, 06:28:43 am

Title: LED 10V dimmer
Post by: rthorntn on April 18, 2022, 06:28:43 am

Hi,

I got a LED lamp that has a dimmer capability, from what I have read it needs a "current source 10v dimmer".

So it got me thinking can I just use a USB buck boost adapter to supply the 1-10v, it only needs 10ma?

Thanks.
Richard

Title: Re: LED 10V dimmer
Post by: Terry Bites on April 18, 2022, 03:14:51 pm

The 0-10 or 1-10 volts is a control protocol. Its a just a control voltage . This voltage can be applied to multiple bulbs or LED current source PACKS at the same time.
In the instance of your diagram, the current source is inside the bulb assembly. Some bulbs need a separate constant current source or DC voltage supply. Dimmable power packs often contain the 10V regulated supply so all you need is a pot.

Title: Re: LED 10V dimmer
Post by: tepalia02 on April 20, 2022, 03:37:12 pm

I think you need a constant current LED driver.

Title: Re: LED 10V dimmer
Post by: rthorntn on August 24, 2022, 04:23:26 am

This is the PCB of the 0-10V DC dimmer, this works with my lights but I'm not super happy with it and want something that has a bit better "resolution" and "range".

The pot starts at 0°, clicks on at 40° and turns to about 280°.   I think a multiple turn pot would be a good start, something "digital" would be even better, maybe even so something that I can preset?

Has anyone seen anything off the shelf?

Or something I can DIY with an MCU with code available?

Thanks!