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High voltage ohmmeters – Circuit Schematic
High voltage ohmmeters
Most ohmmeters of the design shown in the previous section utilize a battery of relatively low voltage, usually nine volts or less. This is perfectly adequate f...
self made data logger – Circuit Schematic
self made data logger
Version V2. 9 supports also GPS-receiver with ANTARIS chipset and simultaneously using of internal temperature sensor of MS5534A and external DS1820 sensor. Thi...
Flash ADC – Circuit Schematic
Flash ADC
Also called the parallel A/D converter, this circuit is the simplest to understand. It is formed of a series of comparators, each one comparing the.....
Digital Ramp ADC – Circuit Schematic
Digital Ramp ADC
Also known as the stairstep-ramp , or simply counter A/D converter, this is also fairly easy to understand but unfortunately suffers from several.....
PIC16F688 Digital Voltmeter – Circuit Schematic
PIC16F688 Digital Voltmeter
This project describes how to make a digital voltmeter using a PIC microcontroller. A HD44780 based character LCD is used to display the measured voltage. The P...
Simple O2 meter with LM3915 – Circuit Schematic
Simple O2 meter with LM3915
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Test-Measurement 4 – Circuit Schematic
Test-Measurement 4
In circuit diagrams given in equipment manuals, voltages at various points in the circuit are usually marked. A deviation from these values indicates that some ...
Test-Measurement – Circuit Schematic
Test-Measurement
This was a Student Project of mine, it is a very basic instruments that could do most of the tasks on a test bench. The cabinet used, was available as a part of...
Mixed-Circuits – Circuit Schematic
Mixed-Circuits
This Circuit is a simple Analog to Digital Interface with a capability of 10 to 12 bits resolution. 10 bits means 1024 counts or parts of a full scale FS which ...
LED-Circuits 8 – Circuit Schematic
LED-Circuits 8
This Circuit is a DPM or digital panel meter. It has a analog bar graph display and a 3-1/2 digit digital display. ICL7107 is used in the 200mV configuration. U...
mosfets tester – Circuit Schematic
mosfets tester
FETs can be found in the power section, LCD inverter, UPS, Amplifier, Monitor B+ and S-correction circuit, ATX power supplies and etc. When this component fails...
scr tester – Circuit Schematic
scr tester
Although you don`t find SCR and Triac in all electronic equipment, this does not mean that both are not important components. You need to learn how to test it s...
Sensitive RF Voltmeter Probe – Circuit Schematic
Sensitive RF Voltmeter Probe
Sensitive RF Voltmeter Probe Circuit This Circuit measures RF voltages beyond 200MHz and up to about 5V. PARTS.....
SCR TESTER – Circuit Schematic
SCR TESTER
SCR TESTER CIRCUIT The Device under test cathode, anode and gate are connected to the unit`s CATHODE, ANODE and GATE terminals,.....
Micro Ampere Meter – Circuit Schematic
Micro Ampere Meter
The microampere meter The microampere meter gives full scale deflection for 0.1 V input. The current to be measured is passed through a known.....
Capacitance Meter – Circuit Schematic
Capacitance Meter
Capacitance Meter Circuit Using 555 It directly reads capacitance in the range 100pF to 10µF. IC1 and IC2 operate as an astable (with frequency.....
Analog Frequency Meter Circuit – Circuit Schematic
Analog Frequency Meter Circuit
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ICL7106 electronic thermometer circuit design project – Circuit Schematic
ICL7106 electronic thermometer circuit design project
The ICL7106 Integrated circuit contain all the active circuitry for a 3 1/2 digit panel meter (DPM) in a single chip. It was designed to interface directly to a...
Digital Voltmeter for Power Supply – Circuit Schematic
Digital Voltmeter for Power Supply
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ESR Meter – Circuit Schematic
ESR Meter
Take a good capacitor, around 100 or 1000 microfarads, and connect a small resistor, 10 or 5 ohms, in series with it. Connect to the meter and adjust that pot u...