A simple, cheap yet highly effective infrared remote control safe lock circuit can be studied in the following post. Using IC LM567 The LM567 IC is one of my favorites simply because it’s too versatile, and becomes applicable in most of the crucial circuit concepts through hassle free configurations. One such crucial yet simple IR […]
Newly Updated Circuit Projects:
How to Measure Gain (β) of a BJT
In this post we’ll study a simple opamp circuit design which can be applied for measuring the beta or the forward current gain of a particular BJT in question. What is beta (β) The beta (β) is the forward current gain that every BJT inherently possesses. It determines the efficiency of the particular device in terms […]
Make this Simple Music Box Circuit
This simple circuit can be used to emulate the operation of a music box. The number of notes may be limited to 10 at the most, and therefore is capable of generating a simple melody. By: Akanksha Rathode Circuit Operation The circuit uses two popular integrated circuits: The timer 555 and 4017 decade counter Operation […]
Extended Telephone Ring Amplifier/Repeater Circuit
The discussed phone repeater circuit can extend the range of your land line ring sound from the phone such that one is able to make a call heard in another room or even in another house. By: R.K. Singh Circuit Operation The circuit can be connected with an attached buzzer, the buzzer with a driving […]
Simple Thermostat Circuit Using Transistors
The electronic thermostat explained here can be used to control the room temperature by appropriately switching (turning on and off) a heating device. By: R.K. Singh Operational details of electronic thermostat The circuit employs a thermistor NTC (negative temperature coefficient) as the sensor device. – As long as the ambient temperature stays higher than the […]
Power Interruption Alarm Circuit for Instant Power Failure Indications
This power interruption alarm circuit will alert you whenever there’s a power failure or an interruption in the mains. In some special conditions it becomes imperative to know whether the mains that powers some important system or circuit is absent. By: Manisha Patel How the power failure alarm works This proposed circuit is connected to […]