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Talking Electronics Frequency Counter

Posted on Wednesday, July 10th, 2013 in kit biz by DP

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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 decade counter/divider ICs. Three of these operate in tandem and each divide the incoming count by ten – and display or reset by the alternating signal from the 4047. However for larger frequencies (above 900 Hz) you need to change the frequency fed to the display circuit in order to display the higher (left-most) digits of the result. A jumper wire is used to select the required level (however if you mounted the kit in a case, a knob or switch could be used).

This entry was posted on Wednesday, July 10th, 2013 at 7:00 pm and is filed under kit biz. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

One Response to “Talking Electronics Frequency Counter”

  1. Sleepwalker3 says:

    Ha! I remember this, I think I even know where the mag is. Gee that brings back some memories!

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