Posts Tagged ‘frequency counter’

A 7400 frequency counter, on perfboard

Monday, April 9th, 2018

jaeblog published a new build: I like perfboard, especially the ones with plated trough holes. But I also like SMD components, and more and more fun IC’s are not available in DIP. So a while ago I designed some perfboard with 1.27mm pitch, making some SMD parts like SOIC stuff...

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Posted in DIY | 4 Comments »

Fluke/Philips PM66xx frequency counter OCXO upgrade

Thursday, May 5th, 2016

Dan Watson documented on his blog an OCXO upgrade board he designed for the Fluke/Philips PM66xx line of frequency counters: My counter came with the standard XO timebase option, which has fairly poor specs for stability and drift. It is difficult to trim precisely with the single-turn trimmer capacitor on...

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Posted in open source | 3 Comments »

Nanocounter is an accurate frequency counter using an FPGA, STM32 and a bluetooth android app

Tuesday, April 5th, 2016

Andy Brown has designed and built a frequency counter using an FPGA, STM32F072 and an Android GUI - the Nanocounter: After studying the above counting methods I decided on the following goals for my frequency counter, which I’m going to call Nanocounter. Very accurate measurement over a range of 1 to 50MHz....

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Posted in Android, FPGA | No Comments »

Audio oscillator with frequency counter

Friday, April 17th, 2015

Xristost blogged about his DIY Audio oscillator with frequency counter project: After I finished the oscillator, I made some minor changes in the square signal part of the schematic. I connected five of the inverters in parallel with low value load resistors, thus reducing the influence of the parasitic capacitance of...

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Posted in DIY | No Comments »

Frequency counter with PIC16F628A

Tuesday, September 23rd, 2014

xristost blogged about the frequency counter module he made: First of all I wanted a PIC microcontroller to do the whole job without any additional ICs. Also I wanted to use the the familiar 16F628A, but because one of the portA pins (RA5) can be used only as input I was short...

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Posted in DIY, PIC | 9 Comments »

Talking Electronics Frequency Counter

Wednesday, July 10th, 2013

John Boxall over at Tronixstuff has a detailed review of Talking Electronics' Frequency Counter: The counter works by using a multi-vibrator using a CD4047 to generate a square-wave at 50, 500 and 5 kHz, and the three trimpots are adjusted to calibrate the output. The incoming pulses to measure are fed to the 4026...

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Posted in kit biz | 1 Comment »

Reciprocal frequency counter

Monday, February 6th, 2012

Alan built a reciprocal frequency counter. What sets reciprocal counters apart is that they adjust to the signal measured, sort of an auto-ranging feature. It is AVR based and automatically enables or disables a prescaler to handle frequencies from 0.5 Hz to 100 MHz. It can give the same precision...

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Posted in project logs | 13 Comments »

XC9572XL breakout board: Frequency counter

Wednesday, November 2nd, 2011

Jason implemented a frequency counter on an XC9572XL CPLD. It uses a 1Mhz clock to count the duration of the input signal pulse, and shows the output on a 6 digit display. Initially he had to use additional 7400 logic ICs to convert BCD output from the CPLD to the...

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Posted in CPLD | 2 Comments »

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