I wanted to make a small jogging pendant for my CNC machine.
I saw these at the local Radio Shack closing sale.
Simple matrix layout.
Comes with a printable face.
They even include an IR window and 9V battery clip.
But then when I was at P&T Surplus I saw this $5 deal on a real CNC Pendant…
The circuit board should be easy to replace. Just have to line up the LCD right. It’s a standard 16X2 display so it will get reused.
E-Stop and Pause buttons are wired to a small plug
and a SIP header for the keyboard is really easy to layout
Easy enough to see through the board to wire the keyboard.
Since I’ll use a lot of pins on the keyboard I opted for this PCF8574 based I2C LCD adapter.
I soldered it to the back of the LCD display
A quick test from an Arduino
There are 3 buttons that point to the display. I can fit about 3-5 characters per button. I may not bother with this unless I find a really good use for it.
Here’s the code (nothing much so far):