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2.5GHz Frequency Counter – Circuit Schematic
2.5GHz Frequency Counter
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Test Instruments – Circuit Schematic
Test Instruments
Prior to the advent of FET-input digital multimeters (DMMs), the vacuum tube voltmeter (VTVM) was the primary instrument for use when high input impedance was r...
Test Instruments – Circuit Schematic
Test Instruments
Prior to the advent of FET-input digital multimeters (DMMs), the vacuum tube voltmeter (VTVM) was the primary instrument for use when high input impedance was r...
Motorola Micor S-meter Driver – Circuit Schematic
Motorola Micor S-meter Driver
The artwork style of the opamp and of the meter face both suggest that is is an ACC design and is from an old issue of ACC Notes. I have credited it as such. I ...
Motorola Micor S-meter Driver – Circuit Schematic
Motorola Micor S-meter Driver
The artwork style of the opamp and of the meter face both suggest that is is an ACC design and is from an old issue of ACC Notes. I have credited it as such. I ...
Flash A/D Converter circuit – Circuit Schematic
Flash A/D Converter circuit
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Loudspeaker Impedance Meter – Circuit Schematic
Loudspeaker Impedance Meter
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Simple Frequency Meter – Circuit Schematic
Simple Frequency Meter
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Simple Capacitance Meter – Circuit Schematic
Simple Capacitance Meter
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Quick on-board Junction Tester – Circuit Schematic
Quick on-board Junction Tester
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Arduino based electricity meter – Circuit Schematic
Arduino based electricity meter
The idea is that the infra-red light is reflected by the disc, except by the dark red line. The reflected light is received by the sensor and this way the Ardui...
Range finder – Circuit Schematic
Range finder
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Video Head Tester – Circuit Schematic
Video Head Tester
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Sonic depth finder of the amateur fisher – Circuit Schematic
Sonic depth finder of the amateur fisher
The block diagram explaining the device and operation of the sonic depth finder, is shown on fig. 1. The clock G1 generator operates interaction of knots of the...
Frequency meter - LC measuring instrument – Circuit Schematic
Frequency meter - LC measuring instrument
Feature of an offered frequency meter that he besides the main function allows to define inductance of various coils, resonant frequency of contours, capacity o...
VCM 163 Valve Characteristic Meter Equipment – Circuit Schematic
VCM 163 Valve Characteristic Meter Equipment
The AVO VCM 163 is one of the few tube testers (British: valve tester) being able to measure tube electrode currents, e. g. plate and screen current (fig. 1, le...
VHF & UHF universal frequency meter – Circuit Schematic
VHF & UHF universal frequency meter
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frequency counter PIC-Based Digital – Circuit Schematic
frequency counter PIC-Based Digital
Apply power to the frequency counter and set the coarse (top pot) and fine (bottom pot) adjustments to show zero frequency on the display. Turn the pots counter...
BINARY DECIMAL LED DISPLAY VERSIONS OF THE SIMPLE FREQUENCY COUNTER – Circuit Schematic
BINARY DECIMAL LED DISPLAY VERSIONS OF THE SIMPLE FREQUENCY COUNTER
There are other display methods than the original 8 led frequency counter has. They are perhaps easier to read and may have a format that fits better to the fro...
PIC Frequency Counter with Frequency Lock – Circuit Schematic
PIC Frequency Counter with Frequency Lock
This PIC software combines frequency counter and frequency lock functions. By adding couple of transistors and operation amplifier TL082, it is possible to lock...