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Digital Voltmeter and Ammeter Circuit Module – Circuit Schematic
Digital Voltmeter and Ammeter Circuit Module
This V/I display module is eminently suitable for building into an existing DC power supply, where it gives a precise indication of the set voltage or the curre...
Monitoring Voltages with Scaling Circuits – Circuit Schematic
Monitoring Voltages with Scaling Circuits
I am using the UCD90124/A, among other things, to monitor multiple voltages. Several of these are > 2. 5v so I have scaling circuits so as not to violate the 2....
Simple DIY Cable Continuity Tester – Circuit Schematic
Simple DIY Cable Continuity Tester
This simple cable tester can be used to check 2 wire cable such as coax cable, telephone cable, audio cable and etc. Power the circuit using 9V battery. Plug in...
Linear Resistance Meter – Circuit Schematic
Linear Resistance Meter
Most analogue multimeters are capable of measuring resistance over quite a wide range of values, but are rather inconvenient in use due to the reverse reading s...
DIGITAL RESPIRATION RATE METER – Circuit Schematic
DIGITAL RESPIRATION RATE METER
Measurement of physiological parameters like heart rate and respiration rate is crucial in the field of medicine. Here is a simple method for respiration rate m...
Simple Electro meter circuit – Circuit Schematic
Simple Electro meter circuit
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Thermal Watt Converter Circuit – Circuit Schematic
Thermal Watt Converter Circuit
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Thermal Watt Converter Test Circuit Schematic – Circuit Schematic
Thermal Watt Converter Test Circuit Schematic
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a d converter – Circuit Schematic
a d converter
This is the first draft of the pH to 1-Wire converter schematic, and some of the component values are still missing. The original circuit runs on 12 VDC, but si...
The food salt salinity tester meter circuit – Circuit Schematic
The food salt salinity tester meter circuit
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Sound Level Meter Circuit – Circuit Schematic
Sound Level Meter Circuit
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Frequency to voltage converter – Circuit Schematic
Frequency to voltage converter
A very simple and low cost frequency to voltage converter based on the TC9400 IC from Microchip is shown here. TC9400 can be either wired as a voltage to freque...
Analog Frequency Meter Circuit – Circuit Schematic
Analog Frequency Meter Circuit
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Micro-Ohm Meter Senior Project Page – Circuit Schematic
Micro-Ohm Meter Senior Project Page
A digital micro-ohm meter is necessary to verify the condition of shunts used in the Electrochemical Analysis & Diagnostics Laboratory (EADL) at Argonne Nationa...
Digital thermometer with LED / LCD display – Circuit Schematic
Digital thermometer with LED / LCD display
Now we bring you two versions of a homemade digital thermometer with ICL7106 that I recently built. One version uses a LED display, the second version LCD displ...
Simple digital frequency meter – Circuit Schematic
Simple digital frequency meter
Simple digital frequency meter has many applications. It may be an experiment for beginners, laboratory equipment or a meter built into some device. Ideal where...
The simplest digital LCD voltmeter with AVR – Circuit Schematic
The simplest digital LCD voltmeter with AVR
This is probably the simplest possible digital voltmeter with Atmel AVR microcontroller and LCD display. The circuit is controlled by a microprocessor IO1 - AVR...
Hardware design overview – Circuit Schematic
Hardware design overview
Openbench Logic Sniffer is an open source logic analyzer. It`s designed to support the SUMP logic analyzer software at the lowest possible cost. Download the so...
Dangerous DSO part 4: Over simulated – Circuit Schematic
Dangerous DSO part 4: Over simulated
Yesterday we covered the Dangerous DSO analog front end. This circuit divides our +/-10volt input to +/-0.5volts, and re-centers it between the 2volt and 3volt ...
Prototype: Openbench Logic Sniffer logic analyzer – Circuit Schematic
Prototype: Openbench Logic Sniffer logic analyzer
Openbench Logic Sniffer is an open source logic analyzer. It`s designed to support the SUMP logic analyzer software at the lowest possible cost. Download the so...