DMM Clock - LCD?
I bought a very cheap LCD alarm clock and took it apart, intending to shoehorn it inside the DMM case. The LCD was connected directly to the tiny circuit board via a conductive elastomer strip. There wasn't space to do that in the DMM case, so I realised I'd have to improvise a ribbon cable and press one end against the contacts on the circuit board and the other against the LCD glass. Here you see a test run. The LCD is working. I've also connected the buttons on the DMM's front panel to the appropriate contacts on the clock's circuit board so I can use them to set the time. Some of the switches were "sticky" -- when pressed in they'd stay in, another press would release them into the off position. I found I could remove a small detent wire and make them "momentary" instead.
But I was never very comfortable with the ribbon cable approach, it seemed too fiddly. I also had a hard time coming up with a good way to mount the LCD. So I made no progress.
And that's where it sat for a looong time, in the"too hard" box.
DMM Clock - LCD?
I bought a very cheap LCD alarm clock and took it apart, intending to shoehorn it inside the DMM case. The LCD was connected directly to the tiny circuit board via a conductive elastomer strip. There wasn't space to do that in the DMM case, so I realised I'd have to improvise a ribbon cable and press one end against the contacts on the circuit board and the other against the LCD glass. Here you see a test run. The LCD is working. I've also connected the buttons on the DMM's front panel to the appropriate contacts on the clock's circuit board so I can use them to set the time. Some of the switches were "sticky" -- when pressed in they'd stay in, another press would release them into the off position. I found I could remove a small detent wire and make them "momentary" instead.
But I was never very comfortable with the ribbon cable approach, it seemed too fiddly. I also had a hard time coming up with a good way to mount the LCD. So I made no progress.
And that's where it sat for a looong time, in the"too hard" box.