Universal Op-Amp Board for SMD SOIC-8 Package

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https://www.electronics-lab.com/universal-op-amp-board-for-smd-soic-8-package/

This is an 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 SOIC8 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 […]

Microphone Preamplifier – Sound Sensor

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https://www.electronics-lab.com/microphone-preamplifier-sound-sensor/

This is an easy to construct dual-stage microphone pre-amplifier. The project can be used as a sound sensor or microphone pre-amplifier. The 1st op-amp pre-amplify the very low-level signal coming from the condenser microphone and 2nd op-amp provides more boost to the audio signal. The pre-amplifier is an important building block for many audio communication […]

ThermoDuino – OLED Display Thermometer and Tiny Arduino Board

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https://www.electronics-lab.com/thermoduino-oled-display-thermometer-and-tiny-arduino-board/

ThermoDuino is a mini Arduino compatible board that consists of LM35 temperature sensor, ATMEGA328 chip, and 0.96″ OLED display. The board has been designed to measure temperature. We have used the LM35 SO8 SMD sensor which is connected to A0 analog pin of the chip, and the OLED display is connected to A4 and A5 […]

Sound Sensor with onboard Relay Arduino Nano Shield

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https://www.electronics-lab.com/sound-sensor-onboard-relay-arduino-nano-shield/

This sound sensor with Relay driver shield for Arduino Nano can be used to develop sound-activated ON/OFF switch or other projects that require sound senor. LM358 op-amp is used as the amplifier, 1st op-amp amplifies the microphone signal, and 2nd op-amp works as a half-bridge rectifier that converts AC signal into a DC voltage. This […]