I have a store-bought battery powered LED light assembly that is controlled by a microswitch. The light is installed in a hard to reach place so I wanted to hook it up to a cheap ASK wireless receiver with a remote. I bought the RF M4 (http://www.adafruit.com/products/1096) from adafruit. It's built around a PT2272.
I didn't do enough checking on the light's circuit ahead of time and it turns out the microswitch in my light assembly is on the ground side. What is the cheapest way to make the RF M4 switch the ground for me? I was planning on powering the receiver circuit with a standard 9V battery which is within the specs for the chip. I was thinking a transistor circuit, but I'm not great at designing those.
Just as a quick overview, the M4 receiver here puts out Vcc on the D2 pin when it receives the signal from the transmitter. I couldn't tell from the PT2272 data sheet (http://www.adafruit.com/datasheets/PT2272.pdf) if there was a way to get D2 to go to ground instead.
Also, in my light assembly the only current going through the switch is the pulse for the switching circuit to turn the lights on. The LED current does not appear to go through the switch since the light stays on after releasing the momentary switch.
I'm still a beginner so I really just don't know which way to go from here.