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Showing content with the highest reputation since 11/18/18 in all areas

  1. 2 points
    terjeio

    PCB Laser Exposer/Printer

    A new design is now up on my Github account, cheaper laser cut acrylic case and 3D printed "laser head". Some info on Hackaday as well.
  2. 1 point
    Hope you snag one. Enjoy! Use code CYBER https://www.arrow.com/en/products/raspberrypi3/raspberry-pi-foundation
  3. 1 point
    jsolarski

    ADC12 timer trigger

    to expand 1. Should my sample and hold time be 0.28ms? your hold time should start after .28ms, and holding the peak value between 0ms and .28ms 2. If so then should I wait for next 0.04ms + 9.68ms to collect my next ADC value as the next input pulse needs that much time to arrive? Your next sample should start on your next pulse to the LED which is 9.68ms 3. If 1 and 2 are correct, how can I set up my ADC for this? ADC setup is a case by case basis, and will be trial and error. but a good place to start is the code examples for your chip, and the user guide.... My tip to you, is look into pulse sampling.
  4. 1 point
    jsolarski

    ADC12 timer trigger

    Reading the data sheet..... you need a PWM time of 10ms. with a duty cycle of .32ms Your AD read time should be from 0ms to .28ms from the start of your pulse on the LED Setup up your ADC for single conversion, one channel count how many clock pulses and figure out how long conversion and sampling time.
  5. 1 point
    radcliffkaty1

    PCB Calculator Programs

    All these shared files have a lot of learning material. Thanks, @zeke for these helpful files. 😍
  6. 1 point
    yyrkoon

    Industrial / commercial sensors

    By the way, this is the light level sensor we went with: http://www.acuitybrands.com/products/detail/147289/Sensor-Switch/CM-PC-ADC/Photocell-Dimming-Ceiling-Low-Volt Kind of expensive at ~$140, but when you need it NOW, hehe you usually end up paying through the nose. Eventually we may end up designing our own sensors, if there is a need . . . Problem is, finding good enclosures for a decent price.
  7. 1 point
    terjeio

    PCB Laser Exposer/Printer

    Improved homing cycle has led to (near) perfect registration of solder mask. Layer registration mark, lines are ~0.1mm wide. Part of TSSOP 20 footprint, mask is way past "use before" date so some problems with spots appearing. I have started to apply the Riston film on wet PCBs, dust problem nearly gone - easier to handle. Terje
  8. 1 point
    MattTheGeek

    PCB Calculator Programs

    And for those high current PCBs, A trace width calculator. http://circuitcalculator.com/wordpress/ ... alculator/
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