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:: Home » Meters & Detectors » Page 4

Meters & Detectors

VU meter circuit Stereo/Mono 20 LED with PCB

Last Updated on: July 14, 2022 by Apichet Garaipoom
VU meter circuit Stereo_Mono 20 LED with PCB

High-performance LM3914/LM3915 VU meter circuit projects that widely popular can display with 20 LEDs on stereo or mono with 10 LEDs for all audio systems. […] Read more

Categories Meters & Detectors Tags VU Meters, LM3914 32 Comments

KA2284 Stereo audio level indicator

Last Updated on: July 6, 2022 by Apichet Garaipoom
KA2284 Stereo audio level indicator

Here is cheap Stereo audio vu meter circuit with PCB. using KA2284 x2 and 10 LED or 5 LEDs per channel, it is simple to builds and few parts. put projects Read more

Categories Meters & Detectors Tags Sound Level Meters, VU Meters 3 Comments

Simple Moisture Meter using 2N2222

Last Updated on: August 18, 2022 by Apichet Garaipoom
moisture meter circuit

This simple moisture meter circuit uses for level moistness temple of the earth. Fine the value R2 give Meter read the value has 1mA. When the moistness […] Read more

Categories Meters & Detectors Tags 2N2222, Soil Moisture Meters 2 Comments

Simple solar plant watering alarm

Last Updated on: November 23, 2021 by Apichet Garaipoom
we test Simple solar plant watering alarm it works very well

This is simple Solar plant watering alarm circuit. It will sound alarms when the soil is dry. The trees have died. It the solar sell is 6V DC power supply Read more

Categories Meters & Detectors Tags Water Sensor Alarms, Soil Moisture Meters 10 Comments

8 Low Battery Voltage Alarm indicator circuits

Last Updated on: November 23, 2021 by Apichet Garaipoom
Battery low voltage alarm indicator circuits

Why your circuit does not work? Because the battery is run out. These low voltage indicator circuits may helpful for you. If you can know before and change a new one right now. It makes you not have to waste time when using those projects. Read more

Categories Meters & Detectors Tags Battery Testers, Battery indicators 14 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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