Tags Posts tagged with "Dark sensor"

Dark sensor

1 5163
It is a very simple experiment for Arduino amateurs, kids and beginners. It needs two LEDs, one LDR (Light Dependent Resistor), one tactile switch...

2 2526
With this project/application, you can make a light sensor dependent lamp. You can make a light sensor or dark sensor with this application. The light...

9 15484
Description: This versatile 741 operational amplifier module can be used for making a dark detector using an LDR, a photo transistor and a photo...

28 11004
Description: In this clap switch we use three different modules given below. It is necessary to make these three modules in order to make...

10 12313
Description: LM358 is also one of the types of operational amplifier. LM358 consists of two independent, high-gain, frequency-compensated operational amplifiers designed to operate from a...

1 3870
Description: In the monostable mode, the 555 works as a "one-shot" pulse generator.  Other applications of monostable mode include timers, pulse-width modulation (PWM), missing pulse detection,...

9 6314
Here's a simple light activated police siren using light dependent resistor and NE555 timer. Before you make this project, I would recommend you to...

3 3377
Here's a simple experiment with LDR and CD4093. This is just a modification of a previous project "dark sensor using 2 transistors". In this...

25 9787
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...

0 4001
Light operated switch works with NE555 timer and light dependent resistor. It uses relay and toggle switch idea for operation.

9 7852
When you press an infrared transmitter or normal TV remote control near TSOP1738 infrared sensor, the 555 timer configured in monostable mode gets triggered.

1 4746
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.

2 3121
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.

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An automatic dark sensor can be made using a PNP transistor(BC557).

1 3700
In this case, LDR has been replaced with capacitor C1-0.01uF and resistor R3-1K has been replaced with L1 & VC1. In place of a LED, a Piezo Diaphragm has been kept. We just need to add inductor, capacitor and a piezo diaphragm to convert a dark detector to an AM radio.

14 4905
To make an object counter we can use a simple dark detector circuit and a normal calculator. Pole and NO (Normally Open) terminals of a relay have to be connected to the two pins which are used to activate ‘=’ key of calculator. As we block the light falling on LDR, the calculator starts counting. For the calculator to work as a counter, we first need to press ‘1’ and ‘+’ keys.

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