pressure sensor circuit


Posted on Feb 7, 2014

A dance pad, basically 4 pressure sensors (up, down, left, right). I already made the USB controller as a dance pad and whatnot, now I need to know how to hook up the actual sensors. I want the input to be pulled down to ground, so I figured that I would put a rheostat there as a variable resistor for the pulldown. This way, I could adjust how strong the pull-down is, theoretically


pressure sensor circuit
Click here to download the full size of the above Circuit.

adjusting the amount of pressure required from the sensors. If the resistance is less in the sensor, then it should register a button press, whereas if the resistance is less through the pulldown, it should register a 0. That part all works just great, however, I want all of the sensors to use one pulldown adjustor, so I dont need to put 1 rheostat per sensor. Attached is a schematic I thought would work, but in fact when I press a sensor, all of the inputs go high. What am I doing wrong EDIT: The schematic is drawn wrong. For all of those variable resistors, the outputs actually come off of the wiper, not the other side. I couldn`t find out how to do this in the schematic program, so I drew it like such to show the general idea. All the resistors in the image are variable and set-up to be such. Actually, I cant use the AD converter beacuse there will be two pads at least and each should have its own pressure sensor. The way I did it, the outputs from the sensors can either go into USB, or can go out to another pad, which sends it to USB, so I need just simple 1 or 0`s I think I tried putting the adjustor pot on the 5volt source, adjusting the voltage. Didnt really like how it worked, but maybe Ill mess around with that again, thanks.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    PC 12V ADAPTER
    Wireless Lan for AVR microcontrollers
    Low Power consumption 5V regulator circuit
    Ambient-light-ignoring-sensor
    Interfacing PC keyboard to AVR microcontroller
    5V Power Supply Circuit Using Overvoltage Protection
    plate reverb restoration
    Homebrew Utrasonic Imager
    5x10 vu meter
    Speech Board for SPO256
    Improved Anode Circuit Parasitic Suppression for Modern Tubes
    ZN414 portable Receiver
    High Precision Digital Pulse Meter Circuit



    Top