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  1. Steve Peart

    Best surface material for IR sensor touch table?

    Definitely! Obviously your remote for the TV is covered with a material that allows IR to pass through, but doesn't have the problem of also receiving IR reflected back. I realize that whatever material is used there could be some diminished signal that makes it all the way back through but I...
  2. Steve Peart

    Best surface material for IR sensor touch table?

    Hey all, I am looking for the best (hopefully not crazy expensive) material that would diffuse LED light, but allow Infrared light to pass through and still pass back to an IR sensor? Making a multiplexed LED touch table and want it to light up and diffuse the "pixels" on the table, but not...
  3. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    UPDATE! (finally): I finally got some more time to work on this project and got the prototype for the sensor board running standalone. I am building my own CNC machine to make a ton of these circuit boards as small as I can so I can make a table surface from them. Just a small step, but...
  4. Steve Peart

    ESP8266-01 with Arduino Nano issues

    Also, assuming the 9v adapter current DOESN'T come through the 3.3V pin, I threw together a quick voltage divider for the 9V coming in to have a 3V line and that didn't work either. I am partially wondering now if the software serial cannot handle the 115200 baud rate to the ESP8266-01, but for...
  5. Steve Peart

    ESP8266-01 with Arduino Nano issues

    Does powering the Nano with the 9V Adapter not give the entire circuit access to the current? Even the 3.3V line?
  6. Steve Peart

    ESP8266-01 with Arduino Nano issues

    Hello All, First, I know I can technically just flash things to the ESP8266-01 without the Arduino. I couldn't get that to actually work so I wanted to use the ESP8266-01 out of the box as a Wifi connection for my arduino nano. I have looked at a lot of tutorials for this setup and found they...
  7. Steve Peart

    slip ring connectors

    OBJ File: slip_ring.obj STL File: slip_ring.stl Let me know what you think, it was a first thought sort of idea since I was sick of waiting 4 weeks to get slip rings from china.
  8. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    Oh i missed the attachment, the resistor there is the one that the LED is using, which is 200ohms for this LED, the Voltage, when enabled, is reading: 4.87V leading up to it, and 2.73V after it. The 5v line I have it connected to on the arduino, is the 5V always on line. Shouldn't that be ok? I...
  9. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @dorke: What do you mean by resistor in green? For now, I have been using some red LEDs so I can see that it's working before i use the IR Transmitter LED. If I line the 5v from the arduino to the resistor before the LED, then the resistor to the LED, then the cathode of the LED to the ULN2803...
  10. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    So should I be using the "output" channels on the 2803 as the GND for the LEDs instead of as the positive voltage? I switched around the wires on one after you mentioned it being an open "collector" and things appear to be working. Is that the correct way to handle it?
  11. Steve Peart

    slip ring connectors

    I attempted to create a 3d printable slip ring as well using TinkerCad and a 3d printer at my library. I moved before I could print it and test though. My plan was to wrap the inner rings with copper tape and the outer "brushes" which were actually made to be circular to avoid a scratching of...
  12. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @Bluejets: I am not entirely sure what you are hinting at but i was under the impression that a darlington setup would increase the voltage and amperage of whatever is being sent into it. Typically to roughly double the voltage, so I am unsure why it's reading 0.63V when the voltage applied is ~4.9V
  13. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @dorke, @BobK: So I finally debugged my circuit down to a problem with a couple of the IR Sensors I had been testing with. They got fried somewhere along the line, seemingly pretty sensitive to excessive input. :) I have everything appearing to work as far as getting the Shift register to run...
  14. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    For additional clarity, what I am trying to do would look a lot like this: http://www.instructables.com/id/RGB-LED-Pixel-Touch-Reactive-Gaming-Table/?ALLSTEPS In the build that guy used, he went with micro-controllers for each node, but my intention was to use the MUX tree designed heavily...
  15. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @(*steve*) : I feel like I am too far into this design for that idea at this point. I have purchased all of my RGB LEDs and at least a handful of the sensors. Wouldn't what you're suggesting make the process run a bit slower since i'd have to double-duty the LEDs as sensors and IR Lights...
  16. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @dorke , @BobK : Does this look right to you guys in terms of how i've wired this up? I am currently having an issue where it appears as though no matter how many sensors I have hooked up in a row, they all read the same value, but I am not sure if it's a software problem or a wiring problem...
  17. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @Sunnysky, The point of the IR Sensors in the table is mostly to determine if an object is touching the table at that point. That information about the grid of sensors should be read as quickly as possible and then decisions can be made based on the grid values. I was still hoping for analog...
  18. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @BobK, I have been slowly accumulating resistors as I go. If I buy them from jameco (which used to be only a couple miles from my house), I would always get ~100 of them since they are so cheap. I may buy the 4.7k ones for this project, I just want to be able to at least test on the breadboard...
  19. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    @dorke, @BobK, sorry, didn't ping you directly above. I am wondering what resistance values could potentially be alternatives since i don't have these particular (4.7k) ones on hand. What is the benefit to using the resistor network in lieu of the individual resistors? Thanks!
  20. Steve Peart

    Cheapest way to get data from multiple(100s) of sensors?

    Would a 3.3k resistor work or is the full 4.7k needed? Why use the resistor network instead of single resistors?
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