The IC 741 Based Audible Light Sensor Circuit using LDR is a simple and useful electronic circuit which detects the change in light intensity and gives an audible sound through the speaker. Also, this circuit works like a light controlled pulse oscillator generator, as IC 741 gives pulse signals at the output and the speaker […]
Automatic Tone Generator Circuit using LDR and 555 IC
Want to build a smart sound circuit controlled by light? then this simple yet interesting electronics project is a perfect choice, which uses an LDR and 555 timer IC to generate different tone or beep sounds whenever the light level changes, making it best for alarms, warning systems and beginner electronics projects. The 555 timer […]
Simple LDR Based Light Detector Circuit using Timer 555 IC
Nowadays, light detector circuits are very useful in many small electronic projects, For example, we use them in automatic lamps, security alarms, and light sensing devices. In this Simple LDR Based Light Detector Circuit using Timer 555 IC, the IC works as the main control unit, along with that, the CDS photocell, also called LDR […]
Automatic Light Sensor Buzzer Circuit using Transistors
A Automatic Light Sensor Buzzer Circuit using Transistors is a simple electronic project which gives alarm sound when light level changes. In this circuit, an LDR (Light Dependent Resistor) senses the surrounding light, and when the room becomes dark, the resistance of LDR increases and because of this, transistor stages switch ON one by one […]
Adjustable 4 LED Flasher Circuit using Transistors
This Adjustable 4 LED Flasher Circuit using Transistors is a simple and useful electronics project for beginners which uses two 2N2222 transistors, four LEDs, capacitors, resistors and one variable resistor for speed adjustment. The main purpose of this circuit is to flash four LEDs in an alternating pattern, two LEDs glow first and then the […]
Simple 1.5V Single Cell LED Flasher Circuit
In our previous article, we made a Simple 1.5V White LED Flasher Circuit using transistors and ferrite coil, but in this article we have design a Simple 1.5V Single Cell LED Flasher Circuit without ferrite coil. This circuit works only with one 1.5V battery cell, so it is very useful for small battery projects and […]