The LM3886 is a high-performance audio power amplifier capable of delivering 68W of continuous average power to a 4Ω load and 38W into 8Ω with 0.1% THD+N from 20Hz–20kHz. The performance of the LM3886, utilizing its Self Peak Instantaneous Temperature (°Ke) (SPiKe) protection circuitry, puts it in a class above discrete and hybrid amplifiers by…
This is yet another sound activated LEDs circuit. I have previously published a similar project.
Description: In the monostable mode, the 555 works as a “one-shot” pulse generator.  Other applications of monostable mode include timers, pulse-width modulation (PWM), missing pulse detection,  touch switches, frequency divider, capacitance measurement, bouncefree switches  and so on.Â
I recently found a video explaining the open source hardware. It’s good to see an association for the open source hardware community. You can be a member, support the association and keep yourself updated with the technologies coming up in the open source world. Link: http://www.oshwa.org//a
Description: This versatile 741 operational amplifier module can be used for making a dark detector using an LDR, a photo transistor and a photo diode. The amplifier has been configured in inverting mode. It compares the change in voltage at pin 2 with the reference voltage at pin 3 and gives output at pin 6…
This is a compact size Bluetooth 5.0 audio transmitter. Maybe your music player (TV, Computer, DVD, Radio etc.) does not have Bluetooth function and you don’t want to use a cable to connect with our amplifier board. You can use this little thing to let your audio player connect with your Bluetooth amplifier board wirelessly.
This is yet another LM317 based power supply for electronics hobbyists and beginners.
BUILDCIRCUIT.COM HAS RELEASED A DIY SHIELD FOR AMARINO, CHECK THIS OUT. This tutorial is for novices who have never made any Android application or worked with Amarino. If you have never done any experiment with Android and Arduino, start with the this experiment.
It’s a simple project to build a stereo preamplifier using electret microphones and the cheap operational amplifier LM358. In the past, we have made few projects comprising LM358, you can check them here. This project uses the dual-channel operational amplifier LM358. Each channel is used to increase the signal of one electret microphone and it…
This is a simple FFT 8×8 Audio LED Spectrum DIY kit. The kit package comes with all the components required to build the kit. After assembly, it works well. The assembly images very amateur and ugly soldering of the components. I should have used a reflow oven and I realized that I need to practice…
Here is a simple and a low cost Lithium Battery charging breakout board. This article is about the charger breakout board based on TP4056. It uses a Micro USB for connecting the breakout board to any computer or ‘USB wall adapter’. It works with linear charging method. It offers 1000mA charge current by default but…
This experiment makes the use of ‘Android- Arduino BTCOMM Shield’ and Amarino. If you are not familiar with the shield, visit this page. This experiment is similar to my previous tutorial- Sensor graph and LED controller together. You can also see one more similar experiment- Sensor graph and LED controller using Smart Phone- Arduino Shield. If you…
In this tutorial, we will turn on and off the LEDs sequentially, such as Christmas tree lights.
If you have come to this page from a search engine, we recommend you to visit the following pages: 1. About Relay module for the popular clap_switch (Get description of this kit) 2. How to connect clap-switch to the relay module 3. How to use the relay-module and the clap-switch to operate electrical appliances In…
This is yet another dark sensor DIY kit. It is slightly different from other dark sensor kits. It has a buzzer and a photodiode that makes it different from other kits. Along with the LED, the kit turns on the buzzer whenever it senses darkness. See all the images below to get the idea for…
In this article, you will know about three easy, useful and absolutely FREE Android applications that facilitate serial communication between Arduino and Android via Bluetooth medium. Before moving on to applications, you can check this article to know about the fundamentals of Android-Arduino communication using Bluetooth. Now, let’s start with the applications first, then we…
The 4 channel RF receiver and transmitter can be used with or without an Arduino. You can connect relays to the receiver outputs to control it wirelessly.
This is a simple metal sensor DIY electronic kit for electronics beginners. Use 3V-5V battery and take metal to its proximity, it will activate the buzzer. The kit can detect metals up to 5cm. Kit parameters: Supply voltage: 3-5V Dimensions: 66 * 61MM Maximum detection range: 5CM The schematic of the kit is given below:You…
The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). Its fairly simple to use, but requires careful timing to grab data. The only…
