DIY KIT 58- Wrist Watch DIY kit
This is a simple wrist watch DIY kit for electronics hobbyists. Anyone with basic soldering experience can build the kit. This is a copy of Solder:Time watch kit from https://www.spikenzielabs.co. It uses DS1302 clock chip.
3W STEREO AUDIO AMPLIFIER USING TDA7266D
Tiny stereo audio amplifier board has been designed around SMD TDA7266D IC from ST. The TDA7266D is a dual bridge amplifier specially designed for Portable Audio, LCD TV/Monitor, PC Motherboard, and TV applications. This circuit provides high quality audio output of 3W approx. on each channel with standard audio signal input. The circuit works with…
TINY PROFESSIONAL MICROPHONE PREAMPLIFIER
The board has been design around INA217 low distortion, low noise instrumentation amplifier. The INA217 is ideal for low-level audio signals such as balanced low-impedance microphones. Many industrial, instrumentation, and medical applications also benefit from its low noise and wide bandwidth. Unique distortion cancellation circuitry reduces distortion to extremely low levels, even in high gain….
Yet another simple amplifier for your Arduino and music projects
BuildCircuit has written few articles about audio amplifier and music modules. One of the most popular examples is “Audio amplifier using LM386“. This article is about a bit advanced audio amplifier made using TDA7052A. Download datasheet of TDA7052A It is not wise to connect an 8 Ohm loudspeaker directly to Arduino microcontroller pins. When we…
Troubleshooting electronic projects
We all know that troubleshooting is a process of identifying and solving problems that cause a circuit to malfunction. This article is about troubleshooting basic and amateur electronic projects, not about sophisticated devices . With the exception of minor problems,troubleshooting sophisticated systems at the circuit level, like computer, VCR, mobile phones, etc. requires special skills,…
+9V TO 60V PWM 2.3A SOLENOID VALVE DRIVER USING DRV101
The DRV101 is a low-side power switch employing a pulse-width modulated (PWM) output. Its rugged design is optimized for driving electromechanical devices such as valves, solenoids, relays, actuators, and positioners. The DRV101 module is also ideal for driving thermal devices such as heaters and lamps. PWM operation conserves power and reduces heat rise, resulting in…
Arduino Project 15- Arduino Motor Control With L293D OR SN754410
As stated on the title, in this tutorial, we will rotate a motor in both directions. To achieve this, we can use a switch or the serial monitor. We will need an integrated circuit chip (IC), called H-Bridge, we will use a L293NE or SN754410 chip for our experiment.
Amarino DIY shield for Android-Arduino-Bluetooth experiments
About Amarino Shield Amarino shield can be used for doing several experiments with Amarino and Android serial emulators. For example, you can operate a multicolor lamp, sensor graph, light sensor, etc. The shield is just a modification of previous shield designed and published by Sagar Sapkota (Buildcircuit.com). Amarino shield 3.0 has added one more header space…
Change Bluetooth Audio Amplifier Name or Audio Tone
All of our Bluetooth audio amplifier boards and Bluetooth audio receiver boards use AudioB plus module as the core bluetooth receiver module. The default bluetooth name is “BT SPEAKER”. Maybe you want change it to a special name. We just updated the AudioB plus design and breakout the programming port. Now, you can change the…
Build a simple DIY clap switch
Description: Here’s a simple DIY clap switch circuit. The circuit is mainly composed of an audio frequency and a bistable trigger circuit. Q1 and Q2 together form an amplifier circuit. MK1 (electret microphone) accepts Clap/Audio signal and that enters to transistor Q1 through the coupling capacitor C1 and enters to Q2 base through collector directly after getting…
Arduino Project 6- Servo control with a potentiometer
In this tutorial, we will use a servo and a potentiometer to make the servo motor change its position according to the given value given by the potentiometer. Components used in this project: Name Quantity Component U1 1 Arduino Uno R3 Rpot1 1 10 kΩ, Potentiometer M1 1 Servo Arduino Sketch:
TSIR04 – 4 Channel Outputs- 4 optically Isolated Inputs Wi-Fi Smartphone Relay
This is a TSIR04 Wi-Fi version relay board with optically isolated inputs and OLED display and temperature sensor port. You can easily control this relay board by your computer or smartphone using Wi-Fi. The communication method also can be changed easily. Replace the WiFiBee module with a BluetoothBee, it becomes a Bluetooth relay. It will be a USB…
ISOLATED HIGH POWER DC SOLID-STATE RELAY SHIELD FOR ARDUINO
Isolated high power Mosfet DC solid state relay shield allows you to control high current DC load in switching or PWM control mode. The project can be used in wide verity of applications like DC DC Converters, inverters, DC motor control, solenoid, LED Dimmer, battery chargers and it can control inductive and resistive loads. On board high…
DIY KIT 21- How to a make a photoresistor based dark sensor
I have written several posts similar to this one before. This experiment is again about a dark sensor based on LDR or photoresistor. There are a few components and basic soldering experience should be enough to build this up. It is a good and easy kit for electronics beginners.
RC module
Description: An RC circuit is used to introduce time delay in circuits. A combination of resistor and capacitor gives a time constant. The following circuit shows a basic RC circuit. In the figure C1(100uF) works as a storage capacitor. When you press the switch, the capacitor charges quickly and provides base current to the transistor…
The simplest and the cheapest FM transmitter- Do-it-yourself(DIY) kit for amateurs
We are not this FM transmitter DIY Kit with an enclosure. Here’s one of the easiest, simplest and the most popular FM transmitter for amateurs and electronics beginners. With this DIY kit, you can transmit your voice or audio over an ordinary FM radio within the FM broadcast band. It is a DIY kit designed…
Cosmarino Assembly Tutorial
If you have come to this page from a search engine, please check this page first, you will eventually come to this page again. About Cosmarino The assembly process of the Cosmarino kit is very straight forward. You just need to follow the silkscreen labels to get the idea of assembly. A basic knowledge in…
How to make a batteryless (crystal set) radio
CRYSTAL SET The simplest radio receiver, known as a Crystal Set, consists of nothing more than a coil, tuning capacitor, diode detector, and a pair of earphones. A typical circuit diagram for a Crystal Set Radio is given below where inductor or coil L1 is tuned by variable capacitor VC1 to the transmitter frequency. Diode D1 demodulates the signal, which is…