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In the promotional set:Blackpill STM32F401CCU6 ST-LINK/V2 (Compatible)
Universal WiFi controlled switch. It can control one home appliance....
Multifunctional probe (clip) with a balck hook
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Evaluation kit with LittleBee GW1N-1 FPGA chip. Offers 1152 LUTs and 864...
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Step-Down converter module with input voltage from 4.75 to 23V, output...
Evaluation kit with LittleBee GW1NR9 FPGA. It offers 8640 LUTs, 6480...
Adafruit 833 - Liquid Flow Meter - Brass 1/2" Nominal Threaded
833 - Liquid Flow Meter - Brass 1/2" Nominal Threaded
Measure liquid/water flow for your solar, computer cooling, or gardening project using this handy basic flow meter. This sensor sit in line with your water line, and uses a pinwheel sensor to measure how much liquid has moved through it. The pinwheel has a little magnet attached, and theres a hall effect magnetic sensor on the other side of the brass tube that can measure how many spins the pinwheel has made through the metal wall. This method allows the sensor to stay safe and dry.
The sensor comes with three wires: red (5-18VDC power), black (ground) and yellow (Hall effect pulse output). By counting the pulses from the output of the sensor, you can easily track fluid movement: each pulse is approximately 2 milliliters. Note this isnt a precision sensor, and the pulse rate does vary a bit depending on the flow rate, fluid pressure and sensor orientation. It will need careful calibration if better than 10% precision is required. However, its great for basic measurement tasks!
Example code for the Adafruit liquid flow meters - it will calculate the approximate quantity of fluid in liters and display on an LCD or the serial monitor.