Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Frequency Counter

Frequency Counter

The device presented here can be used to count events as well as to measure frequencies and times. Most of it is built from discrete HC (high speed CMOS) logic.
Features:

Frequency measurement from 0.1Hz to ¡Ý10MHz; gate times of 0.1, 1 and 10 seconds.

Time measurement 0.001ms to 10000s (time clock 1MHz and 1kHz): measuring L/H time or 1, 10 or 100 complete pulses or time between input A and B transition.

5-digit LED display with display hold.

Microcontroller-steered.

CMOS-compatible Schmitt-trigger inputs with over- and under-voltage protection.

The circuit is divided into 8 separete module sheets (with the top ones in the list below being more interesting) and one connection diagram on how to put the modules together.

Connection diagram: How to join the below modules.

Input schematic: The discrete “heart” (trigger,…)

Logic schematic: The micrcontroller and the supply circuit.

Divider schematic: Divide frequencies by 1,10,100.

Oscillator schematic: 1MHz and 1kHz clock source.

Counter schematic: 5 digit 7-segment LED counter.

BNC input schematic: CMOS compatible input with protection.

“Hardware keys”: 4 debounced keys.

Front panel schematic: Added here for completeness.

Visit Here for more.







 

More Articles to Read

App note: EPIC: Electro-Pyrotechnic Initiator Chip Resistor
App note: EPIC: Electro-Pyrotechnic Initiator Chip Resistor
App note: Noise analysis for high-speed op amps
App note: Noise analysis for high-speed op amps
Skill Sunday: Arrays
Skill Sunday: Arrays
App note: Infrared remote control implementation with MSP430FR4xx
App note: Infrared remote control implementation with MSP430FR4xx
Gesture Controlled Smart Home
Gesture Controlled Smart Home
Design for a Wideband, Differential Transimpedance DAC Output
Design for a Wideband, Differential Transimpedance DAC Output
Wrist thrusters let you fly through the water effortlessly
Wrist thrusters let you fly through the water effortlessly
Bertan/Spellman 225-20R HV power supply teardown
Bertan/Spellman 225-20R HV power supply teardown
Blinking Christmas Lights
Blinking Christmas Lights
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adjusting clock with alarm, hygrometer & thermometer on 1.8″ ST7735 display
Adding an “extra sense” with rangefinders
Adding an “extra sense” with rangefinders
This wireless game controller looks like a rug
This wireless game controller looks like a rug
How to run your ESP8266 for years on a battery
How to run your ESP8266 for years on a battery
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Calibration of a 3-Phase Energy Meter Board on the ADE7754
Making beats on a tiny Arduino DJ controller
Making beats on a tiny Arduino DJ controller
Qinsi-QS5100 Sn63Pb37 solder profile
Qinsi-QS5100 Sn63Pb37 solder profile
Water Detection System
Water Detection System
Professional Hi-Fi 15W Tube Amplifier circuit
Professional Hi-Fi 15W Tube Amplifier circuit
This Arduino machine will judge how sick your ollies are
This Arduino machine will judge how sick your ollies are
Turn an old payphone into a boombox for ’90s hits
Turn an old payphone into a boombox for ’90s hits

Top


Shares