Introduction: Digital Dimmer
This is for a mains ac 230 volt dimmer for resistive and inductive loads. I had to make this as most of my lights were inductive and some resistive so this works great on both I have had it running in house for about 4 years now and still in the process of making a new arduino control panel which I will upload in due course.
Step 1: Prep Pcb
For this you will need to clean your pcb with wire wool to remove any grease etc and wash completely
Step 2: Print Design
This artwork image has been mirrored and printed out on thermal transfer paper as this is very easy to remove and may only require minor touch ups with permanent marker, usually this works out about 98% perfect anyway.
Step 3: Adhere to Pcb
Place the artwork image face down on Pcb and use some tape to keep in place
Step 4: Heat Press
Personally I use a heat press as this is easier than an iron, this is preheated to 190 degrees then the Pcb put in for exactly 2 mins, a tea towel is put over the Pcb to stop it sticking to the press then this is carefully removed as is very hot into a tub of water for about 10 mins.
The thermal paper can then be carefully peeled off.
Step 5: Pcb
I used 2 lots of artwork to fill up 1 Pcb in photo, this can then be etched then the Pcb requires cutting to the correct size
Step 6: Silkscreen
The same process applies for the silkscreen artwork, print the mirrored design to the thermal paper, and heat for 2 mins exactly and cool off in water for another 10 mins then peel off carefully.
Step 7: Final Pcb
Drill all holes in a drill press then your board is ready to populate. The board in the pic is half complete each board will dim 2 channels so 1 channel has been completed in the pic.
This will work with any MCU, but this also requires an additonal Zero Cross circuit, which i can add here if anyone needs it, or i could make a stand alone circuit dimmer with one built in, just let me know if you want to build it.
If you need anymore info on this please let me know.
Participated in the
Circuits Contest 2016