OK, so I have a ready-made circuit that I bought that does some PWM effects on a 2 LEDs. I want to be able to have groups of LEDs to show the effects on with only 1 group active at a time. Is there a type of IC switch that I can use to do this, controllable by an Arduino? I suppose it'd be like a digital version of a dual throw switch, multi-position mechanical switch.
Could you provide more info on:
ready-made circuit
in particular, data-sheet or link, 'd be nice, or at least voltage/power rating.
It's a custom made circuit that someone did for me. It essentially flashes 2 LEDs (1 Red, 1 white) using PWM. The LEDs are 20mA. I want to be able to redirect where the current goes from the effects board to LED groups of my choosing.
Shizman:
It's a custom made circuit that someone did for me. It essentially flashes 2 LEDs (1 Red, 1 white) using PWM. The LEDs are 20mA. I want to be able to redirect where the current goes from the effects board to LED groups of my choosing.
I'm afraid we would have to see the schematic drawing of the 'effects board' to see how you could best 'redirect' the current flow.
Lefty
If your circuit board has the LEDs wired up with a single ground pin and two control pins then you can use a second circuit and switch the ground of the one you want to be on by wiring each to the collector of a transistor. But we need to see the schematic to be sure.
Surely you could at least identify the external connections that your mystery ready made circuit board has. You should be able to use the digital outputs of your Arduino to activate transistors or mosfets to do the required switching.
Don