Advertisement
ESR & Low Resistance Test Meter – Circuit Schematic
ESR & Low Resistance Test Meter
As electrolytic capacitors age, their internal resistance, also known as "equivalent series resistance" (ESR), gradually increases. This can eventually lead to ...
Electronic Torricelli Barometer – Circuit Schematic
Electronic Torricelli Barometer
Although it does not have the same charm as real mercury barometers with long glass tubes on pieces of carved and polished wood, the Torricelli barometer discus...
Digital Remote Thermometer – Circuit Schematic
Digital Remote Thermometer
This circuit is intended for precision centigrade temperature measurement, with a transmitter section converting to frequency the sensor`s output voltage, which...
Cheap AC Current Measurement – Circuit Schematic
Cheap AC Current Measurement
The easy way to measure high AC currents is to use a clamp meter but these are generally quite expensive and cost several hundred dollars at a minimum. Add-on c...
Bicycle Speedometer With Hub Dynamo – Circuit Schematic
Bicycle Speedometer With Hub Dynamo
The idea for this circuit came when the author had problems with the wireless speedometer on his bicycle. Such a device consists of two parts: the cycle compute...
Battery Tester For Deaf and Blind Persons – Circuit Schematic
Battery Tester For Deaf and Blind Persons
Many blind and deaf-blind persons use portable electronic devices to assist their everyday lives but it is difficult for them to test the batteries used in this...
Battery Tester Circuit Schematic – Circuit Schematic
Battery Tester Circuit Schematic
Is the battery empty, or is there something wrong with the device That`s always a difficult question when your walkman or some other battery-powered device appe...
4-Bit Analogue to Digital Converter – Circuit Schematic
4-Bit Analogue to Digital Converter
The operation of the converter is based on the weighted adding and transferring of the analogue input levels and the digital output levels. It consists of compa...
4-20mA Current Loop Tester – Circuit Schematic
4-20mA Current Loop Tester
This design will interest technicians who work on pneumatically operated valves and other 4-20mA current loop controlled devices. Although 4-20mA signal injecto...
Multi Wire Cable Tester – Circuit Schematic
Multi Wire Cable Tester
A multi wire cable tester with a separate LED for each wire. Will show open circuits, short circuits, reversals, earth faults, continuity and all with four IC`s...
Hi Pot tester schematic – Circuit Schematic
Hi Pot tester schematic
The design is based loosely on some ideas from K8CU and AG6K. However, I have simplified the circuit somewhat and used different components. The mechanical enca...
SSFDC based Data Logger – Circuit Schematic
SSFDC based Data Logger
...
Thermistor Thermometer circuit – Circuit Schematic
Thermistor Thermometer circuit
This is my student assignment for the class "Designing Microprocessor Based Instrumentation". The board demonstrates the use of 12-bit ADC, writing c program wi...
mini logger circuit – Circuit Schematic
mini logger circuit
Build your own a personal data logger for recording analog signal. The MiniLOGGER provides 8-channel analog input(-99mV to +999mV), 1-channel pulse input, batte...
Simple Zener Diode Tester – Circuit Schematic
Simple Zener Diode Tester
A simple Zenner diode tester circuit, when coupled with a PWM generator it can be used to measure the breakdown voltage of Zener diodes. Or more generically, it...
A Dual Temperature Display With Humidity Measurement – Circuit Schematic
A Dual Temperature Display With Humidity Measurement
This thermometer uses an LM19 sensor calibrated for measuring a wide temperature range (-55 130 Celsius, -67 266 Fahrenheit) for outdoor temperature measurement...
AVR LC Meter With Frequency Measurement – Circuit Schematic
AVR LC Meter With Frequency Measurement
Building an LC meter for a while since I do not have a multimeter that is capable of measuring inductance and while the multimeters I have can measure capacitan...
Digital thermometer circuit – Circuit Schematic
Digital thermometer circuit
A very precise digital thermometer with LM35 probe (0, 1 degree of freedom). The circuit has two adjustments. One of them, R5, adjusts the displays to 0. To per...
Electronic volt-Ohm Meter Schematic – Circuit Schematic
Electronic volt-Ohm Meter Schematic
...
SWR Meter – Circuit Schematic
SWR Meter
Direct-reading" SWR meters that automatically compute the ratio of Forward and Reverse powers (i. e. you don`t have to adjust any sensitivity controls). Several...