Simple RGB Controller Circuit

[jakeselectronics]

Hey everyone.

I'm making a simple RGB controller for some LED strip lighting which will simply scroll through the seven basic combinations of colours at the push of a button.

Just need some advice on the circuit.

Because the LED strip lighting has a common negative, is it ok to set up the MOSFETs like this?
And can you recommend some cap values for the regs?

 

[birdman0_o]

Those aren't logic level mosfet's are they?

 

[jakeselectronics]

Hmm. Can you commend one? Max load is 500mA

 

[ericgibbs]

Hmm. Can you commend one? Max load is 500mA

hi,
This is a dual NMOS with a logic level Vgs.

 

[birdman0_o]

If you want to save a regulator and a logic level mosfet, use a high voltage pic. There only exists one in the 16f family though

 

[jankop]

Your schematic is very bad idea. You must use strip with common positive or you must use different switch than the NMOS.

 

[Gayan Soyza]

I'd simply use an ULN array & make my design compact.

 

[jakeselectronics]

You must use strip with common positive or you must use different switch than the NMOS.

I'm not 100% sure what you mean by 'strip'...

I'd simply use an ULN array & make my design compact.

Like a ULN2001?
https://www.futurlec.com/Linear/ULN2001.shtml
How would you wire it?

 

[Gayan Soyza]

Use ULN2003.

Pin 1 to 7 are the inputs.You can connect PIC pins directly to these pins.

Pin 8 is GND.

Pin 10 to 16 are the outputs.Connect common cathode lines from the LED strips to these pins.

Positive supply to the LED stripes will come directly from the power supply.