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“How do people know there is enough air exchange in their rooms? There is a simple way to make that determined by Seeeduino XIAO. Project Background Most transmissions of coronavirus occur indoors, the majority of those cases are caused by …
“The project presented here provides an isolated interface between the RS-232 cable network and the connected UART systems to protect against voltage spikes and ground loops within the noisy environment and improve system reliability. The project achieves a robust …
“This is small power (Less than 10Watt) transistor amplifier using LM386 and TIP41/42. Although output power is not much impressive, still it can well serve as an amplifier for PC speaker and MP3 player. When living in a packed …
“As you can tell from my list of instructables, each year I try to come up with a new and interesting Electronic Christmas Ornament. They are usually loud, heavy, and something generally too big for the average tree, with that …
“It’s an analog, 20 note polyphonic, square wave synthesizer based on the 555 timer chip. The enclosure and keys are 3D-printed, its models were programmed in OpenSCAD, and its PCB was designed in Kicad. A little history The monophonic …
“LineaMeteoStazione is a complete weather station which can be interfaced with professional sensors from Sensirion as well as some Davis Instrument component (Rain Gauge, Anemometer) The project is aimed as DIY weather station but just requiring the assembly part, because …
“Today I’ll explain how I made this scoreboard which is controlled by a raspberry pi and powered by a 5V power supply. It uses a combination of ws2811 and ws2812b leds for the lighting and the structure is made …
“How to 3D print and assemble your very own programmable and remote controllable automatic domino laying machine. Who likes knocking down absurdly long runs of dominoes? I do. Who doesn’t like laying them all by hand. I don’t …
“In 1969, high-density MOS integrated circuits were still new and logic circuits were constructed in a variety of ways. One technique was “four-phase logic”, which provided ten times the speed and density of standard logic gates while using 1/10 …
“Harvesting lemon trees is considered hard work, due to the big size of trees and also due to the hot climates of the regions where lemon trees are planted. That’s why we need something else to help agricultural workers …