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“A RPM meter is a simple device that is especially useful for example in a machining workshop to meassure the RPM of a machine’s spindle and thus determine the surface speed of a tool or workpiece. I decided to …

“Hello there, In this tutorial, I will make a gaming console using an esp12e and OLED display. With this console, We can play different types of retro games like snake, space war, duck hunt etc. so let’s get started …

“A lightweight, reliable, and completely portable ultraviolet (UV) radiation meter. Ever since suffering severe chemical burns, I could not expose myself to sunlight and ultraviolet radiation. Knowing how to deal with sunlight is an essential skill for anyone in similar …

“uProbe is a simple logic/oscilloscopic probe in a highlighter case. In this article I want to tell you about my DIY logical probe - uProbe. It is simple enough because it is based on a microcontroller. As you can see …

“Wireless programmable via Wi-Fi room thermostat with air quality monitor and other useful features. Story A commercially available wireless room thermostat works in the autonomous heating system of my apartment. The system, of course, functions without it: the thermostat was …

“The Crius Resistor Tester is a handy little Gadget I made for my projects that help me measure the value of a Resistor. The logic behind its operation and the code as far as I can understand and I AM …

“Test transistors, diodes, thyristors, resistors, capacitors and inductors. Also identify their leads and obtain their component value. Story When starting my journey into the world of electronics, I obtained a lot of parts by disassembling discarded electronic devices to salvage …

“RFID access to doors is great, but what if the tag gets lost or stolen? It gives any possessor unvetted access. I’ve used RFID tags for a long time but the inherent security of standard cards is the same …

“Monitor the CO2 level and display the measurements on an OLED screen. Supplies: - 1 x WS2812B RGB LED - 1 x Arduino Nano - 1 x MH-Z19C - 1 x USB Cable - 1 x 0.96 inch OLED Screen - Dupont cables”

“After running my Arduino controlled Gainclone amp for the last 8 years, the LCD died and I decided that it was time for a revamp. This instructable is based on the original and is designed to be an ‘upgrade’ from …