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This circuit breaker employs a single operational amplifier (op-amp) and yet has a wide range and is user-friendly. A circuit breaker is an electrical switch intended to protect an electrical circuit or device from damage caused by excess current...
An “ideal” or perfect operational amplifier is a device with certain special characteristics such as infinite open-loop gain, infinite input resistance, zero output resistance, infinite bandwidth and zero offset. Operational amplifiers are used extensively in signal conditioning or perform...
A filter is often used in electronic circuits to block (or allow) a select frequency to the circuit. For example, if the circuit in question works on DC power, we could use a low pass filter (LPF) and only...
This strain meter shows whether the strain is compressive (reducing the length) or tensile (increasing the length) when an object such as a strut on a crane changes its shape. The strain is sensed by a strain gauge that...
Low-pass filters are widely used in the audio domain. Their most important application is in communication receivers and communication audio circuitry. These filters, when used for audio communications, start attenuating frequencies above 3.4 kHz, as the bandwidth of the...
This multi-utility flashlight consists of three sections: a flasher, a sound-to-light display and a white LED-based flashlight. Multi-utility flashlight circuit The flasher circuit is built around an NE555 timer IC that is wired as an astable multivibrator. It flashes a pair...
Security has been a major concern for people for long. Any personal belonging kept out of personal reach is prone to attack and sometimes, even the ones we are using, get attacked. Presented here is a touch sensitive alarm that...
This IR music transmitter and receiver contains two circuits - one transmitter and one receiver. The transmitter transmits musical tones through an IR LED and the receiver receives those signals through a photo transistor.
This ultra-sensitive photodiode based fire detector protects your electronic devices like computer and television set. It uses a photodiode as the fire sensor and sounds an alarm immediately on sensing a spark or fire in the power supply section...
This music operated lighting effect generator comprises five sets of 60W bulbs that are arranged in zig-zag fashion. The bulb sets glow one after another depending on the intensity of the audio signal. No electrical connection is to be...