I connected up my multimeter between this wire and ground, and then powered up the Arduino. Once power and ground were wired to the Arduino, I connected a wire to the data pin on the receiver. I used my Arduino just to provide power / ground for the receiver unit, since I didn’t have another 5v power source set up. Luckily, I scored an affordable kit that also had a transmitter.
I ended up going with a setup that was quite a bit simpler than others have reported (though possibly less safe for that reason).įor the project I was interested in, I first purchased a 433 MHz RF receiver (since the outlets I’d purchased used that frequency). I’ve never heard of anyone doing it on a Macbook Pro. I had read several posts on how others had used their sound cards as oscilloscopes (sources at the end), but I decided to write my own post on the process because: Because the sound card is already a device that does a great job with high frequency electrical signals, it’s a great candidate to act as a basic oscilloscope. Recognizing that many types of electronics communicate with each other essentially by sending “high” and “low” voltage signals in certain sequences and for certain durations of time, the oscilloscope helps us capture and record those signals.Ī microphone is basically a device that turns sound waves into electrical signals, which then go to your computer’s sound card for interpretation. Having done so, I was able to replicate the RF signal and control the outlets programmatically from my Arduino! I imagine it will be equally easy to get them working from my Raspberry Pi, which will probably be the end goal.Īn oscilloscope is basically a tool to help you measure voltage over time. With that out of the way, I’m super pumped to say that I successfully used my Macbook Pro and a 433 MHz receiver as an oscilloscope to analyze the RF signal from a remote control for these inexpensive outlets. Please see my formal(ish) disclaimer for more info. I don’t know what I’m doing with electronics, I’m a total beginner, so you probably shouldn’t believe anything I write here without verification from a more credible source. This could possibly be unsafe and result in damage to your computer or your health. Bottom Line: You can use your Macbook Pro’s sound card as an oscilloscope! Disclaimer
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