Cooling Fan Controller Using Temperature Sensor LM35
https://www.electronics-lab.com/project/cooling-fan-controller-using-temperature-sensor-lm35/
The project presented here is a low-cost solution for heat management of the heatsink and various equipment that requires automatic control of a cooling Fan. The project is built using a very cheap LM358 OPAMP. LM358 is used as a comparator, and a trimmer PR1 is provided to set the temperature threshold (Fan ON trigger […]
Piezo Element Amplifier for Guitar and Violin
https://www.electronics-lab.com/project/piezo-element-amplifier-for-guitar-and-violin/
The board presented here is a preamplifier for contact microphones that are used for amplifying the sound of musical instruments which do not contain electrical pickups, such as guitar and violins. Most contact microphones use a piezo element to convert vibration in the body of the musical instrument to a voltage. The circuit is built […]
Audio Line Driver using DRV135 with Balanced Output
https://www.electronics-lab.com/project/audio-line-driver-using-drv135-with-balanced-output/
The project presented here is a differential output amplifier that converts a single-ended audio signal input to a balanced output pair. This balanced audio project consists of high-performance OPAMPS with on-chip precision resistors. They are fully specified for high-performance audio applications and have excellent AC specifications, including low distortion (0.0005% at 1 kHz) and high […]
SPI Programmable-Gain Amplifier with Input VOS Trim and Output OPAMP
https://www.electronics-lab.com/project/spi-programmable-gain-amplifier-with-input-vos-trim-and-output-opamp/
The project presented here is an SPI programable Gain Amplifier using MAX9939. The MAX9939 is a general-purpose, differential-input programmable-gain amplifier (PGA) that is ideal for conditioning a variety of wide dynamic range signals such as those found in motor current-sense, medical instrumentation, and sonar data acquisition applications. It features SPI-programmable differential gains from 0.2V/V to […]
Full Wave Rectifier Using Single Supply OPAMP
https://www.electronics-lab.com/project/full-wave-rectifier-using-single-supply-opamp/
This is a Full wave rectifier project built using MAX44267 dual OPAMP which provides true zero output with a single supply. The circuit converts Bipolar/AC input into full-wave output. CN1 is provided for sinewave input, CN2 helps to connect the power and output. Operating supply 15V DC, D1 power LED. The MAX44267 precision, low-noise, low-drift […]
Universal OPAMP Board for SMD MSOP8 Package
https://www.electronics-lab.com/project/universal-opamp-board-for-smd-msop8-package/
This is easy to build and very useful project for hobbyists and students to learn and create OPAMP-based projects. The project accommodates a single OPAMP in the MSOP8 package. The project provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It provides the user with many combinations for various […]
Bidirectional Speed Control for DC Motors
https://www.electronics-lab.com/project/bidirectional-speed-control-for-dc-motors/
This is a very simple bidirectional speed control of a small DC brushed motor. The project is built using power OPAMP TCA0372 which can drive a load up to 1A. Connecting a small DC motor and trimmer pot will control the motor forward/reverse operation along with speed control. A Trimmer potentiometer is provided to set […]
Universal OPAMP Board for SMD SOT23-5 Package
https://www.electronics-lab.com/project/universal-opamp-board-for-smd-sot23-5-package/
This is easy to build and very useful project for hobbyists and students to learn and create OPAMP-based projects. The project accommodates a single OPAMP in the SOT23-5 package. The project provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It provides the user with many combinations for various […]
Universal Op-Amp Board for SMD SOIC-8 Package
https://www.electronics-lab.com/project/universal-op-amp-board-for-smd-soic-8-package/
This is easy to build and very useful project for hobbyists and students to learn and create OPAMP-based projects. The project accommodates a single op-amp in a SOIC-8 package. The project provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It provides the user with many combinations for various […]
Universal OPAMP Board for DIP-8 Package
https://www.electronics-lab.com/project/universal-op-amp-board-for-dip-8-package/
This is easy to build and very useful project for hobbyists and students to learn and create op-amp-based projects. The board accommodates a single op-amp in DIP-8 package. The project provides the user with multiple choices and extensive flexibility for different applications circuits and configurations. It provides the user with many combinations for various circuit […]