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Meters and Testers

Analogue Water Flow Sensor/Meter Circuit – Check Water Flow Rate

Last Updated on January 11, 2019 by Swagatam 4 Comments

cascading IC 4033 circuit

In this post I have explained a simple water flow meter/sensor circuit using hall effect sensor and a pulse counter circuit. Referring to the diagram shown below, we can see an arrangement consisting of a circular enclosure having a couple of pipes drilled in and a circular turbine shaped wheel installed inside the enclosure. How […]

Filed Under: Meters and Testers, Water Controller Tagged With: Analogue, Check, Flow, Meter, Sensor, Water

Simple ESR Meter Circuit

Last Updated on January 2, 2024 by Swagatam 77 Comments

ESRMeter

In this post I have explained a simple ESR meter circuit which can be used for identifying bad capacitors in an electronic circuit without removing them practically from the circuit board. The idea was requested by Manual Sofian Technical Specifications Do you have a schematic about ESR meter. Technicians recommend me to check the electrolytic […]

Filed Under: Meters and Testers Tagged With: ESR, Meter, Simple

LED Brightness and Efficiency Tester Circuit

Last Updated on March 13, 2019 by Swagatam 4 Comments

In this post I have explained a simple LDR brightness and efficiency tester circuit set up using an LDR and a digital Ohm meter. The idea was requested by Mr. Prashant Technical Specifications I want to check brightness and light of 1 watt led. Can i check it with help of ldr. Bekoz luminous sensor […]

Filed Under: Meters and Testers Tagged With: Brightness, Efficiency, LED, Tester

Simple 1.5 V Inductance Meter Circuit

Last Updated on January 2, 2024 by Swagatam 22 Comments

InductanceMeter

Here a simplest yet quite accurate inductance meter is presented, which can be built within few minutes. Furthermore, the circuit can be powered-up with a single 1.5V cell. However, a frequency meter would be required to work-out the inductance. Designed and Presented by: Abu-Hafss  Using Cross-Coupled NPN BJTs The circuit is pretty straight forward wherein, […]

Filed Under: Meters and Testers Tagged With: Inductance, Meter, Simple

LM317 IC Tester Circuit – Sort Out Good ICs from Faulty Ones

Last Updated on January 14, 2021 by Swagatam 7 Comments

LM317 Tester

Here is simple but handy testing circuit for LM317 adjustable voltage regulator IC. I am sure it can be used to test other similar ICs like LM117, LM158, LM358 etc. The circuit is pretty straightforward. The circuit is based on normal configuration of adjustable voltage regulator. How it Works For details follow https://www.homemade-circuits.com/2011/12/how-to-build-simplest-variable-power.html A DPDT […]

Filed Under: Meters and Testers Tagged With: Faulty, Good, LM317, Ones, Sort, Tester

Satellite Signal Strength Meter Circuit

Last Updated on January 8, 2024 by Swagatam 33 Comments

satelite signal meter circuit

Here I have explained how to make a simple inexpensive satellite signal strength meter which can be used for aligning dish antennas with local satellites in order to achieve the correct positioning and maximum signal strength from the antenna. How LNB Works The LNBs that are used for receiving satellite signals (digital or analogue) are […]

Filed Under: Meters and Testers Tagged With: Meter, Satellite, Signal, Strength

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