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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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Low Voltage Battery Indicator circuit using LM339

Last Updated on: February 24, 2023 by Apichet Garaipoom
Low Voltage Battery indicator circuit

The simple low voltage tester circuit using LM339,can use Battery voltage monitor for voltage sources that problems, by LED display and alarm sound. Read more

Categories Meters & Detectors, Recycling electronics Tags Battery Testers, Electronic buzzer, Level voltage indicator 12 Comments

Continuity tester circuit with Buzzer and LED

Last Updated on: March 23, 2023 by Apichet Garaipoom
Create continuity tester circuit with buzzer and LED

Create continuity tester circuit with buzzer and LED for check solder joint defects, not kill components on PCB, as probe gives tiny current and voltage. Read more

Categories Meters & Detectors Tags Electronic buzzer, IC-741, Tested 2 Comments

LED VU Meter circuits using transistors, 5 to 20, 40 LED

Last Updated on: March 23, 2023 by Apichet Garaipoom
LED VU meter transistor

See LED VU meter using transistor is analog circuit to show the level of power audio signal. You can build 5 LED to 20 LED display with PCB. Read more

Categories Meters & Detectors Tags Sound Level Meters, NPN transistor circuit, VU Meters 13 Comments

Simple Light Detector Alarm with solar sensor

Last Updated on: July 15, 2022 by Apichet Garaipoom
Simple Light Detector Alarm

This is Simple Solar light alarm circuit with the special edition, that improve this circuit whole new to higher efficiency. use solar cell instead of LDR Read more

Categories Meters & Detectors Tags Light Alarm Circuits 1 Comment

Food & Water Salinity Tester Meter circuit

Last Updated on: September 24, 2019 by Apichet Garaipoom
salinity tester meter circuit

SEE a simple salinometer or salinity tester in food and water. Good for health. Using LM324 and few parts and LED display easily use, with 9V batts Read more

Categories Meters & Detectors Tags Electronic Test equipments 6 Comments
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Categories

  • Amplifiers (94)
    • Preamplifiers (20)
  • Power supply (86)
    • Variable Supply (20)
    • Switching Mode (15)
  • Inverters (14)
  • Battery Chargers (13)
  • DC converters (18)
  • Digitals & Microcontrollers (35)
  • Controls & Timers (55)
    • Motor Controller (7)
  • Lightings (30)
  • RF – Radio Circuits (24)
  • Meters & Detectors (59)
  • Oscillator circuits (38)
  • 555 Timer (21)
  • Basic Electronics (64)
  • Alternative Education (2)
  • Recycling electronics (8)

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