A frequency counter project built from TTL chips in 1985.

I built a frequency counter around 1985 using wirepen. Let's try it out 35 years later. Audio and video transfers: https://www.video99.co.uk/ Please support us on Patreon   / video99couk   or Paypal to colin@video99.co.uk Music “Let It Run” with permission, copyright Cristie/MacFarlane. Sorry I do not offer an audio or video equipment repair service.