Since I now can provide moisture sensor values via MQTT to OSPi, it's time to order a board and the other necessary hardware. As I understand, there are plans to integrate MQTT subscriptions into the OpenSprinkler firmware. I hope that this will...
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...
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'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...
PCBs came in! Thanks JLCPCB!!Soldered up the boards - Kino in the Design Lab Laser cut a cool outline in plywood that I'm using for the base for testing.Boards were soldered and mounted. There were some clearance issues with the meter...
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...
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:...
To make the display work on revision 1, I bypassed the display driver and wired the pico IO pins strait to the segment LEDs. It is a little faint, as the display driver circuit worked completely differently, but it works to test the display.
I did another test with the rev1 prototype, this time only measuring voltage, and bringing it all the way to the maximum voltage of 60V. Again I am doing calibration and comparison to my Fluke 101 Multimeter. This has a problem as the Fluke 101 does...
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...
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...
Insert the SIM card into the slot on the back of the boardConnect 0.96 OLED to Maduino Zero 4G LTE(CAT1 A7670) 's SCL and SDA;Connect Temperature and humidity sensor's data pin to Maduino Zero 4G LTE(CAT1 A7670) 's D6;Connect Photosensitive...
At first, we need to prepare the environment for ESP32 development board programming in arduino, and you can cheak this guide.This is a library for our Monochrome OLEDs based on SSD1306 drivers. #include This library allows you to communicate with...
ThingSpeak Is The Open IoT Platform With MATLAB Analytics. Register and log in to your accountDefine the parameter you want in the Channel page and save itOn the API keys page you can find out the API key used to write the data, and you can see an example...