Before Solid State Logic there were Relays

RE: Before Solid State Logic there were Relays

14rhb — Mon, 09 Mar 2020 21:13:31 GMT

Hi John,

What a great action and thank you for taking the time to record such interesting mechanics (otherwise these kind of things get destroyed and forgotten about).

The action reminded me of a chicken pecking at grain [View:/resized-image/__size/16x16/__key/commentfiles/f7d226abd59f475c9d224a79e3f0ec07-71533186-cca7-4b3b-9885-aca12241bc4d/contentimage_5F00_938.png:16:16]

RE: Before Solid State Logic there were Relays

DAB — Tue, 15 Dec 2015 19:43:31 GMT

Great post John.

During my tech school days I worked for GTE and had to hand burnish relay contacts for certain equipment.

We had one engineer who was experimenting with logic circuits using relays. It was an interesting approach, but it took a lot of power and made a lot of noise.

DAB

RE: Before Solid State Logic there were Relays

shabaz — Tue, 15 Dec 2015 12:31:48 GMT

Hi John,

Great videos, very cool to see the mechanical operation of these devices! I'd not seen before how these things work.

It might be vintage tech, but it still has its uses. I used a modern step relay (which does a similar function as the device in your first video)

for implementing a push-on push-off system for a kitchen appliance - means I can have a simpler, cleaner push-switch than a latching or

toggle type of switch.

Similarly the second video shows a technology that is still great for control of devices while using low energy to do so, or where you might

want to control something and maintain state in power loss. They are still useful relay technologies for such scenarios.

Really interesting videos, and great to hear you - hope it doesn't hurt.