2023-04-26 (W) PhoneRobot Decoding automatic tapping mechanism

My auto clicker uses micro USB connectors to attach up to six tap simulators, so I assumed they operated on 5VDC. I soldered a breakout board to my microcontroller and tried to emulate the signal. I only managed to control the light, not the taps. I experimented with different wiring configurations without success.

I grabbed a multimeter and oscilloscope to determine what the original unit generated. I saw the digital signal as a 3.3v square wave on the scope, but I was surprised to see a 24v and negative 24v on the other pins.

I looked online for ±24v DC-DC power supplies, but they are nearly as expensive as the auto clicker, so I will try to integrate the existing hardware.
Measuring voltage and signal

The rest of the posts for this project have been arranged by date.
First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7
Completed projects from year 8

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