Up Counter
An up counter simply counts from 0 to 9. We can use this circuit to make digital object counter. This circuit can also be used to make a digital clock.
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Assembly guide- DIY Arduino
We are now selling the BLUE COLORED DIY Arduino kit This post shows you how to assemble the DIY Arduino board. The assembly process is straight forward. It can be easily assembled if you follow the silkscreen indicators(labels) and have beginning experience with a soldering iron. You will need to read the resistor bands or use…
How to test DYP-ME007 Ultrasonic range finder using NE555 and Multimeter
Test ultrasonic range finder DYP- ME007
PWM HALOGEN LAMP DIMMER
High Current PWM Halogen Dimmer controller project is designed around SG3525 IC and High current MOSFET. Project can handle lamp up to 5 Amps (10Amps Possible with big heat sink) and supply 12-24V DC .Ideal for Halogen Dichroic Lamp or Halogen Lamp. SPECIFICATIONS Supply input 15 to 24 VDC  Load-Lamp 12 to 24 VDC @…
LM386 SMD AUDIO AMPLIFIER MODULE
The Tiny Audio Amplifier MODULE is a good choice for battery operation. It is based on LM386 IC, useful in various applications like robotics, science projects, intercom, FM radio and many more. SPECIFICATIONS Power Supply 6V-9V 300mW Output @ 8Ohms Load On Board Potentiometer for Audio Level Adjust Header Connecter for Supply, Signal in and...
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Dark sensor using two transistors
This works same as the other dark detector circuit. When light is falling on LDR, its low resistance drives transistor Q1-BC547 into conduction. This keeps transistor Q2 cut-off due to low base bias. The D1-LED does not get power as long as ambient light falls on LDR. When the resistance of LDR becomes high in…
HIGH PERFORMANCE STEREO AUDIO AMPLIFIER USING LM3886
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…
DIY KIT 64- ClockIt digital clock DIY kit using Arduino
This is a great kit to learn the basics of soldering. The Sparkfun ClockIt is a basic alarm clock with buzzer based on the ever-popular ATMega328. If you’re just learning how to solder, this kit should take you 15-20 minutes. If you’re a weathered pro at soldering, this is a great relaxing build that should…
How to connect a lamp to DIY relay module for the popular clap switch
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…
FM transmitter and Dark sensor
A dark sensor can be converted to a simple FM transmitter using the following components. This FM transmitter is very sensitive and it has transmitting range of 30 meters.
2 Channels Relay Test Using Arduino Mega and Ethernet Shield
I found this project on Fritzing.org. This is just a simple project for testing a 2 channel relay using an Ethernet shield over an Arduino Mega. In place of LEDs, you can connect 220V AC lamps. If you have not used relay before, check out this article. The Arduino sketch has been compiled and there is…
Simple ultrasonic range finder using HC-SR04
Description:The HC-SR04 ultrasonic sensor uses sonar signals to determine distance to an object. It offers excellent range accuracy and stable readings in an easy-to-use package. Its operation is not affected by sunlight or black material.However, acoustically soft materials like cloth can be difficult to detect.
Factors affecting Wi-Fi transmission range
The range of a Wi-Fi signal can be influenced by several factors, which can impact its coverage and strength. Understanding these factors can help you optimize your Wi-Fi network for better performance. Here are the key factors that affect Wi-Fi transmission range: Frequency Band: Wi-Fi operates in different frequency bands, such as 2.4 GHz and…
DIFFERENTIAL MICROPHONE PRE-AMPLIFIER
The project shown here is a microphone preamplifier that provides high quality amplification, optimized for use in computers, media and mobile applications. The pre-amplifier provides a differential input stage, making the device particularly effective when layout constraints force the microphone amplifier to be physically remote from the ECM microphone. This project features adjustable gain using…
Dark sensor using BC557
An automatic dark sensor can be made using a PNP transistor(BC557).
EasyEDA’s Gerber viewer for beginners and experts
Few months ago, we had published an article about EasyEDA and described about its features. We see EasyEDA as one stop solution for all the PCB design and manufacturing processes. Check out the previous article about EasyEDA. EasyEDA has been providing most of the services related to PCB/circuit design and manufacturing to its customers. The only thing…
SensorGraph using android, amarino and arduino
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.
How to assemble infrared transmitter for infrared receiver DIY kit
Click here to go to assembly page of infrared receiver. You will get these components with infrared transmitter kit: 1 x PCB 1 x Earphone Jack female 1 x Infrared LED 1 x 100uF electrolytic capacitor 1 x 4.7uF electrolytic capacitor 1 x S8050 transistor 1 x 5mm LED 1 x 0.01uF ceramic capacitor- Code:…
Single digit up and down counter using 74LS192 and RF remote control
PCBs sponsored by This is a basic up and down counter that can be controlled with a 4 channels RF remote control This device uses 74LS192 up and down counter chip. It uses NE555(configured in monostable mode) to trigger the 74LS192 chip. 4511 chip works as a driver to the seven-segment display. Schematic: All the...
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TSIR04B – 4 Channel Outputs- 4 optically Isolated Inputs Bluetooth Smartphone Relay
TSIR04B is similar to TSIR04. In this device, we have removed the OLED display and put the relay board in a plastic enclosure. This is a TSIR04B Bluetooth version relay board with optically isolated inputs and temperature sensor port. You can easily control this relay board by your computer or smartphone using Bluetooth. The communication way…