Description: In this clap switch we use three different modules given below. It is necessary to make these three modules in order to make a clap switch. a. Dark sensor using 2 transistors. b. Monostable mode of 555 timer. c. Toggle switch using 555 timer. 🛠️ Dive into our collection of DIY Kits, 🔊 Audio…
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…
Description: This circuit can be used for testing your TV, DVD, VCD, etc. remote control. This is the fundamental module for making infrared based object counter. This project has been derived from “Remote tester project” .
Description: A multivibrator has identical components(capacitors, transistors and resistors) arranged on the left and right hand sides that can be used to implement a variety of simple two-state systems such as oscillators, timers and flip-flops. In a multivibrator circuit, increasing the value of the two electrolytic capacitors increases the time each LED remains on/off.
Description: UM66 or BT66 is a musical IC. The following circuit generates a melody using UM66. This module can be used in a number of projects like, light operated musical bell, remote bell, infrared based music transmitter and receiver, etc.
For the circuit to work as light operated musical bell, we need to connect the SW1- switch to N/C terminal of relay. LDR has to be kept in a dark case.
This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1. The formula for the frequency of pulses is: f= 1.44/[(R1+2R2)*C1].
One of the main objectives of LDR Engineering projects is to make students capable of developing their own logic for making devices. Here is an example that tells how LDR Engineering helps in developing ideas.
