My Hombrew Digital Frequency Counter (C 1976!)

[Robert Darwent]

So, 12 soldered joints to each tube, and 12 soldered joints at the other end to each of the five boards which drive the display. That’s 120 soldered joints for the five tubes alone! Each of the five boards had 22 wire links, so that’s another 44 soldered joints per display board - 220 joints, and 46 IC pins for the three ICs on each display board - another 230 joints. Hence, just the five display boards had almost 600 soldered connections.

Hi David,

Obviously extreme patience and dedication to have undertook all that soldering. I bet it was all the more satisfying though when the unit was completed and it worked!

Thanks for sharing some of your early projects with us, it is really fascinating to see some of the magazine projects of the 70's actually constructed.

I was about 12 to 14 at the time of the articles you mentioned. I well remember the PW Purbeck, in fact I probably still have those issues of PW somewhere, but could only dream of affording the components on my pocket money of the time!

Regards