But at this point, I knew I needed to move it all the way down to the end to move the desk and disassemble it. Prior to this, I was afraid to move it any lower than necessary because I have so much of my work equipment on it and I didn't want to have a child sized desk under any kind of work deadline. The next step was to disassemble the desk and exchange the whole frame, which would have costed 459 otherwise. I pushed the reset button (both buttons for 10+ seconds) and it did't go up. I had gotten a new power supply and it came in the mail today. If I'm right about this, between the oscilloscope trace and the datasheet for a linear servo or two, you can easily replicate the control signal.So, because reddit is wonderful and archives all of its threads, I'm posting a new thread here. Hobby servos have a standard input signal format, linear servos probably do too. I Googled 'linear servo', and some came right up. And even that would change rather slowly, if you're pushing up/down buttons. You'd have the same number of pulses, same spacing, only the width of the pulses changes. That would explain why the pulses you see don't change very much when you press buttons on the controller. Just servos designed for linear movement, instead of rotation. I'm going to take a guess your legs are driven by servos too. The pulse width determines the position you want the servo to turn to. You control them by sending pulses over a single wire. I saw one guys did this by opening the front-panel and shorten the push-buttons, but thats to simple! -)Įver looked at how a hobby servo works? They have a motor, a potentiometer, and a little controller, all together in one box. Im really interested to learn how this actually works! The goal is to make something so i can send/create the signals myself (even without the remote). I was also looking at h-bridges, but im not getting the idea that thats on the side of the remote. I couldn't open the legs, but im guessing there are a few components there as-well. I'm not thinking its just 'shirting to wires' like a simple switch. So, my question is, is there anybody that understand how (and why) it works? Somehow the motors need to get both (simultaneous) the signal to start turning, on top it needs to understand which side to turn (polarity?). These are the numbers on the other side of the PCB

I was trying to google some numbers, but i got nothing. Last thing, the circuit doesn't seem to be fully populated, so i'm guessing its some type of standard design. Not sure if thats why they need a PIC16, maybe to measure some sort of overload? It also states you need to wait 9 minutes after operating the motors for 1 minute (cool down). The manual states the motors stop automatically when it reaches either end. To me to seems a bit of overkill to use a PIC16 for this pretty straight forward function? Red - White = 24.62V (equals power supply output) I measured the following DC voltages (without any buttons pressed): LEG +- 3 wires -+ LEGĪfter opening the remote control, i found a PIC16LF1938 inside and that explained partly why its not that simple. LEFT +- (3 wires) Remote Power (DC 24V) -+ RIGHT Th power supply is: DC 34V 200 watts (ROL ERGO). The remote control looks straight forward, 2 momentary push buttons, one moves it up, the other down. Basically controlling it via my computer. I was trying to hack the controller, so i could send my own signal (via USB) for moving up and down.

Ikea desk that moves up and down