In this tutorial, will learn to use our Arduino board to display the temperature and humidity on the 16×2 LCD display using a DHT-11 sensor. For this project, you need to download the DHT11 library. You can download the library from this page. A long time ago, we had published a similar article. Please check…
This is a simple 4-in-1 do-it-yourself (DIY) kit from BuildCircuit. The kit has four different circuits that can be switched on separately or together at a time using a DIP switch. The four circuits are: 1. Dark sensor using LDR. 2. A latch circuit using NE555 timer. 3. Astable circuit using NE555 timer. 4. A…
The description has been copied from eBay, so, really sorry for the bad English. When S1 is pressed, U1 NE555 pin no. 2 and 4 will get low level at the same time and NE555’s pin no.3 will also be at low level, 7 pin discharges and 6 pin also gets low level. If S1…
This is a 2x100W audio amplifier board with Audio B plus Bluetooth module. It has integrated ST high-performance TDA7498 chip which supports dual channel audio amplification. Both of the channels are capable of outputting nominal power simultaneously and continuously. This board can be powered by any DC 12V-39V* power supply.
This project includes 10 LEDs of 1W each, and provides high intensity lighting that can be used in various applications. The board is made in Arduino shield form and can be used with Arduino Uno or Mega. Each LED can be controlled individually connected to digital pins D2-D11 of Arduino. Circuit requires 9-12V supply, it…
This is yet another multivibrator kit. A similar kit article has been published recently. You can see it here.
In this tutorial, we will create a sketch in which the RGB LED emits only the green light that turns on and off gradually. In the second example, you will see that red, green and blue lights also turn on and off gradually. This project is suitable for school students and beginners. For this experiment,…
Ultrasonic range finder on breadboard.
This is a very basic electronic DIY kit for electronics beginners. There are few LEDs in the circuit that can be turned on by sound. The larger the sound intensity the more the LEDs glow. There is a microphone in the circuit which is sensitive enough to pick surrounding sounds.
Automatic Light detector using variable resistor
A light detector senses light. As the light level increases and LDR meets the lowest threshold resistance, the circuit automatically turns on the LED D1. We can adjust the sensitivity using the preset VR1-10K.
LESS RESISTANCE(VR1)-> LESS DARKNESS TO SWITCH OFF THE LED
HIGH RESISTANCE(VR1)-> MORE DARKNESS TO SWITCH OFF THE LED
The single supply microphone pre-amplifier amplifies the output signal of an electret capsule microphone to audio line levels. An op amp is used as a trans-impedance amplifier to convert the output current from the microphone in to a signal level voltage. The circuit works with 9V so it is good choice for battery operated systems….
An automatic dark sensor can be made using a PNP transistor(BC557).
A multivibrator is an electronic circuit used to implement a variety of simple two-state systems such as light
emitting diodes, timers and flip-flops.
This kit is designed for amplifier manufacturer and DIY users. A volume knob, weatherproof panel mount LED and a TSA2210 amplifier board is included in this kit. Users can adjust the Bluetooth audio volume either on the smartphone or turning the real knob physically. You can power this kit with a 12V DC power supply…
3AMP DC Motor speed and direction controller using MC33035 IC from on semiconductor, though the MC33035 was designed to control brushless DC motor , it may also be used to control DC brush type motors. MC33035 driving a Mosfets based H-Bridge affording minimal parts count to operate a brush type motor. On board potentiometer provided…
Description: LM358 is also one of the types of operational amplifier. LM358Â consists of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a single supply over a wide range of voltages. This module can also be used for testing an LDR, a phototransistor and a photodiode. You just need to replace an LDR with…
