Tag: counter

Infrared based music transmitter and receiver

NOTE: A similar kit is available at buildcircuit store. Please check the store. An infrared based music transmitter and receiver is made up of three...

RC module

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...

Counter module

MAKE A SIMPLE DIGITAL OBJECT COUNTER WITH THIS MODULE- CLICK HERE Description: It's a simple counter module. In the example, we have used 4026B and...

Up counter with multivibrator module

Description: You can make an up counter using a counter module and a multivibrator module. First make a simple multivibrator, then make a counter...

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.

Digital Object Counter using LDR and digital IC

555 timer configured in monostable mode is a simple automatic dark sensor circuit that gives output when light falling on LDR is blocked.

Object counter using LDR and calculator

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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