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  • Project Log 1: Project Start
  • Log     from Magneto-Flex
  • I got this idea based off of a research paper a friend showed me and decided to go full prototyping mode with it!So let's say we have two tapes right, E is our tape with magnets on it, which is slightly longer than D (which has hall sensors). They are...

  • The simulation circuit
  • Log     from MQTT hack for OpenSprinkler OSPi
  • The current version of the OSPi hardware can be found at https://github.com/OpenSprinkler/OpenSprinkler-Hardware/tree/master/OSPi/1.52. I don't need the analog inputs. So my simulation circuit is just a 74HC595 connected to the raspi as in the schematic...

  • Testing MQTT
  • Log     from MQTT hack for OpenSprinkler OSPi
  • There was no big surprise. I wrote another short test program (mqtt-test.py) to subscribe to one of my moisture sensors. They simply provide an unsigned integer value. I merely have to get this value and define a threshold below which the soil is sufficiently...

  • Initial Design
  • Log     from BWLC1A: Yet Another ESP32 Asset Tracker
  • Initially, I roughly design the device to meet the following points: Slim and smallCellular connectivityGNSS -based location trackingLow-costBattery-powered and Rechargeable Working on the schematics, I was able to achieves those points and choses...

  • Ego satisfaction... again (not built yet)
  • Log     from ML Clip Cam
  • So this project is much simpler than the previous ML Hat Cam where it was this massive thing with steppers. The zoomable voice command feature was really neat and it had a control loop to autofocus using laplace variance.(Nickelback: look at this piece...

  • I must fly...
  • Log     from ML Clip Cam
  • In 5 daysThis is a distraction from writing the Pelicam software but days off and nice weather, have to flyI'm going to at the very least build a crude 1 day thing that functionsIt is pretty much just a battery-powered rpi cam... but it will be attached...

  • Week 1 & 2 - PCB Layouts
  • Log     from 25in24 Electronics Project Board
  • I've started by laying out the five boards in Eagle 9.52.  Boards are now being ordered through JLC.  All parts have been ordered through Mouser and Digikey - however sourcing a small meter and solar panel that will match have been a bit of...

  • Week 3 part 2 - testing
  • Log     from 25in24 Electronics Project Board
  • Well, initial testing was more difficult than expected - took about five hours just to get a couple of basic circuits working.  Made a number of incorrect assumptions / mistakes including:Assuming it might be differences between components (germanium...

  • Rev1 Preliminary Accuracy and Precision Test
  • Log     from Multimeter
  • As the title says, this is a preliminary test of the first version of the multimeter. Before the test, I basically calibrated it using my Fluke 101 as a reference. The results of the test are as follows: 2.5V Error: 0.569, Coeff of Var: 0.0102 5V Error:...

  • Frankenscope
  • Log     from Low-Cost Microscope Boom
  • There's not much to this build: Mount the monitor arms to your bench. Follow the manufacturer's instructions, or wing it like I did. I figured out where I wanted the scope to end up when in use and marked the location on my bench. Used a 1.5" hole...

  • Prerequisites and software
  • Log     from VGA videocard for microcontrollers
  • Sometimes, when making your own devices on microcontrollers, there is a need to display huge amounts of information on a display and to use a bigger screen for ease of perception. Unfortunately, there are no ready-made and budget-friendly solutions for...
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