Top 10 Most Popular Hobby Electronic Components for 2024
https://www.electronics-lab.com/top-10-most-popular-hobby-electronic-components-for-2024/
Some people enjoy sketching, some prefer writing, and others are drawn to knitting. People like us, find joy in building and creating electronic devices. The common thread among all these crafts is that they require some basic tools to get started. And for us engineers and hobbyists, the prerequisite is electronic components. So in this […]
Accurate Acoustic Sensor – Sound Frequency to Voltage Converter
https://www.electronics-lab.com/accurate-acoustic-sensor-sound-frequency-to-voltage-converter/
The project presented here is a sensitive sound sensor. The circuit converts sound frequency and outputs DC voltage. The board consists of LM358 OPAMP and LM2907 IC. LM358 is used as a dual-stage microphone preamplifier and LM2907 acts as a frequency to voltage converter. The circuit provides analog voltage output when it detects sound. The […]
Universal Op-Amp Board for SMD SOIC-8 Package
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 […]
Universal Op-Amp Board for DIP-8 Package
https://www.electronics-lab.com/universal-op-amp-board-for-dip-8-package/
This is an 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 […]
Microphone Preamplifier – Sound Sensor
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 […]
30V/4A Adjustable Power Supply (CC-CV)
https://www.electronics-lab.com/30v-4a-adjustable-power-supply-cc-cv/
By Hesam Moshiri and Anson Bao In this article/video, I introduced an adjustable 30V-4A linear power supply that provides constant voltage and constant current adjustment. The output noise of the power supply is low and has measured using the power analysis feature of the Siglent SDS2102X Plus oscilloscope. All component packages are through-hole, so you […]
Optically Isolated Analog Input Module for Arduino
https://www.electronics-lab.com/optically-isolated-analog-input-module-for-arduino/
This is an isolated analog input module that is useful for interfacing Analog signals of various types originated from analog sensors and field devices. The module is very useful for in-process controls, factory automation, industrial applications, etc. Interfacing an analog voltage, an analog sensor to Arduino or other various microcontrollers with optical isolation is very […]
Liquid or Air Pressure Switch with Relay
https://www.electronics-lab.com/liquid-or-air-pressure-switch-with-relay/
This pressure switch project is built using a piezoresistive transducer, LM358 OPAMP as comparator, and a relay. The circuit activate the relay when the pressure in a system exceed a given set-point. Basically, this switch can power ON or OFF a pump, valve, motor, when certain pressure is reached. A trimmer potentiometer is provided to […]
Sound Sensor with onboard Relay Arduino Nano Shield
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 […]
Use a Comparator or Op-Amp to Simplify Light Dependent Resistor Output
https://www.electronics-lab.com/use-comparator-op-amp-simplify-light-dependent-resistor-output/
If your project calls for light sensitivity, it’s hard to beat light dependent resistors (LDRs), also known as photoresistors. They’re available for a few cents each, and their resistance varies based on how much light they receive. In the dark, these devices produce resistances in the megohm range, and can fall to hundreds of ohms […]