The module KY-012 Active buzzer module is part of the series "37 In 1 Sensor Module Board Set Kit For Arduino" the module consists only of an active buzzer that has an oscillator inside it so just power the buzzer and it will emit a sound, typically at the 2500Hz frequency. Through this module it is not possible to determine the frequency of the sound, for this function it is necessary the passive...
I want present to you my new version of the Bluetooth module for a car, home whatever you want.
This module base on the BK8000L module with an additional power scheme for working with car voltage. But it’s also can work by USB.
You can ask me why need to create something new if you can easily buy already exists solution from China?
Here are some pluses:
1. It works.
2. Noise reduction fr...
this is a simple **dark sensor** project that is connected to a relay which u can connect to a domestic light or fan etc. thedevice make sure that when there is light, the relay will be switched OFF and when it's in the dark, therealy is turned ON.
THIS IS AN SMD LM386 CIRCUIT. IT CAN BE USED LIKE A WALKIE TALKIE BUT WITH A MUCH MORE CLEAR SOUND.CONNECT A ELECTRET CONDENSOR MICTO THE "IN" PIN AND "GND" AND FIX A SPEAKER TO THE OUTPUT END.(IF U WANT, CONNECT A LONG WIRE TO THE MIC OR SPEAKER) AND SPEAK THROUGH THE MIC.ITS A REAL FUN AND CHEAP CIRCUIT TO PLAY WITH.
Simple module for creating your own led lamp. You can use RGB strip, WS2812b, one-color strip or others.
![enter image description here]
A collection of analogue effects processing circuits.
These are simulations and not complete designs but will take relatively little work to turn into finished designs that can be transferred to PCB.
More work is required on things like the input buffering, pre-amplification and gain or tone controls, output buffering and mixer stages and power supply (the simulations are all based on a split +...