of tactile switches. The circuit diagram is shown in Figure 2. The whole thing is
assembled on a half size breadboard as shown in the diagram in Figure 3. A
photo of the assembled board is shown in Figure 4.
The first thing to do is to add the headers to the Adafruit MPR121 board.
When you get the board, it comes with two headers that need to be soldered
in place so that in can be inserted into a breadboard. You can find full details of
how to do this at https://learn.adafruit.com/adafruit-mpr121-12-key-
capacitive-touch-sensor-breakout-tutorial/assembly.
It’s very easy: Insert the long pins of both headers into the breadboard to
July/August 2018 27
- USB
- Ethernet
- Web server
- Modbus
- CNC (Mach3/4)
- IO
- up to 256
microsteps
- 50 V / 6 A
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- Isolated
- up to 50MS/s
- resolution up to 12bit
- Lowest power consumption
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- 7 in 1: Oscilloscope, FFT, X/Y, Recorder,
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- up to 32
microsteps
- 30 V / 2. 5 A
;;;;;
- Encoders
- LCD
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