Adding Terrifying Sensors to your AE Modular Oct 13, 2023 12:16:03 GMT pol, jota, and 1 more like this
Post by feijai on Oct 13, 2023 12:16:03 GMT
Okay, time for the Risky Post of the Day.
I've been having fun adding sensors to my AE Modular. The ones I'm using are from DFRobot, a Hong Kong outfit which makes nice single-sensor-on-a-board devices for education and hobby purposes. Each of them takes 5V power, ground, and outputs a signal 0..5V. AE Modular digital ins have a pull-down resistor in them just to be safe, but it shouldn't matter with these guys. I'm also playing with a Sharp 2Y0A21 infrared distance sensor (the thing in the top left). I was concerned that it might slightly change the bus voltage by pulling small spikes of amperage but it doesn't appear to have any effect of consequence on the oscillators.
There are two kinds of sensors here: digital and analog. Digitals are either 0 or 5V output. In the picture I have a capacitve touch sensor, a yellow button, a vibration sensor, and a tilt sensor, all digital. I also have a magnetic sensor and three more capacitive touch sensors (to make a little capacitive keyboard). The digital sensors essentially are outputting gates. And they work great as gates or triggers!
Analog sensors output a value between 0 and 5V. In the picture I have the Sharp IR distance sensor and (lit up) the Grayscale sensor, which just shines a light and then measures how much light was reflected back. I also have an ambient light sensor and a temperature sensor. The Sharp IR CV output is exponential in distance, so it will work great as a D-beam but no very well as a theremin.
I also have a sonar module, but it requires a trigger and then reports a response, not as useful for a synth. Also a color sensor that outputs RGB as three CVs!
Now for the terrifying part and the DISCLAIMER THAT I WILL NOT BE HELD RESPONSIBLE IF YOU DESTROY YOUR SYNTHESIZER, YOU HAVE BEEN WARNED. You can (carefully) plug these suckers into your synth by attaching their red connection to 5V power on your master or a 4ATT/Mix, or the braedboard, attaching their black connection to ground on your master or braedboard, and their signal connection (blue, white, or green) to your CV in. Or directly to the ribbon: I have a Rev2 master, so I had to expose power and ground as shown. Seems to work just fine.
Edit: I have once accidentally shorted power to ground for a brief moment. The synth did not like it, but survived. Don't do that.