PCB for dimmable LED

[Tom van Reeven]

I have very little knowledge in electronics so bear with me please
I'm reverse engineering a lamp that uses 1 and/or 2 dimmable LED lights and also 2 sizes. Thusfar I found a pot meter and a PCB in the lamp.

specs LED light:
230V
50HZ
39mA or 75mA
9 W or 16.5 W
Dimmable
socket S14s

The potmeter inside I have found to be a B500k 500k pot with 5A AC on/off Switch.

However I'm unsure what the PCB exactly does and what components it uses. I have found a few resistors and a condensator, but again, my knowledge of electronics is apprentice at best.


Could someone tell me:

• What it does?
• If it's a standard PCB?
• What components it uses and if there is a schematic drawing of it?
• What an already dimmable LED needs to actually dim, since only a potmeter doesn't seem to be enough

 

[kellys_eye]

Simple thyristor (black, three-leaded thing) 'chopper' circuit using a DIAC (the small blue glass leaded thing).

There are many references to its operation such as this one:

https://thinkelectronics.org/light-dimmer-using-triac-diac/

It's not a standard pcb - pcbs are designed to suit component and housing layouts.

 

[Tom van Reeven]

Thank you very much. I think that's all i needed to know.

Cheers