Frequency Counters

Frequency Counter Circuits
Frequency Counters: #s - D E - Z
Last Updated on: Wednesday, June 02, 2021 05:08 AM

Circuits Designed by Dave Johnson, P.E. :

Laser Used As Vehicular Traffic Counter - This is an illustration how a laser could be used to count traffic and measure the speed of each car passing through the sensor area . . . [Circuit by David Johnson P.E., 01/07/07]
Line Powered 60hz Clock Generator - This circuit is connected to the 120vac power line and transfers 60Hz clock pulses to a logic circuit. The optoisolator used provides 5000 volts of isolation between the power line and the logic side of the circuit . . . [Circuit by Dave Johnson P.E., 02/23/99]

Links to electronic circuits, electronic schematics and designs for engineers, hobbyists, students & inventors:

Exclusive 2.5 GHz Frequency Counter with Blue 2x16 LCD display - This project explain a very powerful frequency counter which has many useful software functions. The software can add or subtract 3 different IF frequencies (±455 kHz , ±10. 7 MHz and ±21. 4 MHz). You have also two level of resolutions, 1kHz and 100Hz. . . [maxit91 AT hotmail.com]

Frequency counter - This project explain a very powerful frequency counter which has many useful software functions. The software can add or subtract 3 different IF frequencies (±455 kHz , ±10. 7 MHz and ±21. 4 MHz). You have also two level of resolutions, 1kHz and 100Hz. . . [maxit91 AT hotmail.com]

Frequency Counter - This is a circuit that uses IC NE555, five decade counters along with a 7-segment driver IC to form a 5 digit decimal counter. The output of the decimal counter is used to drive the numerical display of frequency counter. . . . [© EFY Enterprises Pvt. Ltd. All rights reserved]

Frequency Counter - Frequency counter with output on 7-segment display. . .

Frequency counter based on PIC16F628 and LCD display - . . . [EI9GQ homebrew radio]

Frequency Counter using PIC16C5x - Application Note Published 26-Aug-97. . . [Microchip]

GPS-based universal clock generator - For your microwave frequency counter you don't need a Cesium-beam clock inside your lab when there are at least five flying at 20000Km above you. Locking on the 10KHz output of a Rockwell GPS module we built a 10ppb accurate frequency reference. . . . [Andrea (IW9HJV) and Johnny (IW9ARO)]

Laser Used As Vehicular Traffic Counter - This is an illustration how a laser could be used to count traffic and measure the speed of each car passing through the sensor area . . . [Circuit by David Johnson P.E., 01/07/07]

Line Powered 60hz Clock Generator - This circuit is connected to the 120vac power line and transfers 60Hz clock pulses to a logic circuit. The optoisolator used provides 5000 volts of isolation between the power line and the logic side of the circuit . . . [Circuit by Dave Johnson P.E., 02/23/99]

Microcontroller makes effective frequency counter - 11/23/00 EDN Design Idea Figure 1 shows an efficient and cost-effective frequency counter using an Atmel 89C2051 mC (Reference 1). The design can use any mC of the 8051 family. The circuit counts frequency and sends the count to a PC via the serial port. . . [by Fazal Pathan, Physical Research Laboratory Ahmedabad, India]

One GHz Frequency Counter - This simple counter is useful for frequency measurements of various wireless equipments, especially transmitters, receivers and signal generators in VHF/UHF band. . .

PIC Frequency Counter - Programmable frequency meter with PIC16F84 and UPB1505 prescaler. . .

Transcendent Frequency Counter - This is a top quality project designed to obtain maximum performance. The hardware and software has been pushed to reach the frontier of technology. The transcendent is not only a frequency counter, it is a corner stone in your successfully constructions. . . . [can't find owner's name on website]

Transition Counter Gauges Thermal Stability - 01/04/96 EDN Design Idea The transition count of Figure 1is an easy way to determine if the temperature in a heater is stable. The stable state maximizes the transitions. This circuit works like a digital filter with controlled frequencies and is simpler. . . [by Jose Luis Arce,Tecnosuma Havana, Cuba Jose Luis Arce,Tecnosuma Havana, Cuba]

Frequency Counters Circuits: #s - D E - Z