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:: Home » Meters & Detectors

Meters & Detectors

Include: Volt meters :: Sound level meter :: Analog vu meter :: Soil moisture meter :: Digital meter circuit diagram :: Temperature measurements :: Electronic measurement tools :: Frequency meters :: Best battery tester :: Transistor tester project
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ICL7106 Analog-to-Digital Converter with Meter Circuit

Last Updated on: May 20, 2025 by Apichet Garaipoom
ICL7106 Analog-to-Digital Converter with Meter Circuit

Let’s learn about the ICL7106 3½ digit A/D converter with LCD driver pinout and features, then use it to build simple digital meter circuit. Read more

Categories Meters & Detectors 2 Comments

LED VU Meter Circuit Using Transistors or IC

Published on: March 22, 2025 by Apichet Garaipoom
LED VU meter transistor

Here are some LED VU meter circuit using transistors or ICs with PCB. They show the signal amplitude from an amplifier using 4 to 40 LEDs. Read more

Categories Meters & Detectors Tags NPN transistor circuit, Sound Level Meters, VU Meters 22 Comments

Simple Level Voltage Detector Circuit Using LM741

Last Updated on: June 15, 2025 by Apichet Garaipoom
Learning Simple Level Voltage Detector Circuit Using LM741 OP-AMP

We will be talking about the simple voltage level detector circuit. Its main purpose is to detect if the voltage rises above a certain point. Read more

Categories Meters & Detectors 6 Comments

Solar Plant Watering Alarm Circuit

Last Updated on: March 19, 2025 by Apichet Garaipoom
Simple Solar Plant Watering Alarm

Let’s make a simple plant watering alarm circuit that sounds alarms when the soil is dry. It’s powered by a self-sustainable 6V solar cell. Read more

Categories Meters & Detectors, Solar cell Tags Soil Moisture Meters, Water Sensor Alarms 11 Comments

Simple Water Alarm Circuit Diagram

Last Updated on: March 19, 2025 by Apichet Garaipoom
simple water level alarm

It worked by sounding an alarm when the water level rose to the set level. So we can close the water valve in time and prevent an overflow. Read more

Categories Meters & Detectors Tags Water Sensor Alarms 2 Comments
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