Well, if you dont like sand in your tube projects, and you need a 555 timer... Just use this one made out of 18 tubes!
Building the Largest 555 Timer in the World out of Vacuum Tubes - YouTube
Building the Largest 555 Timer in the World out of Vacuum Tubes - YouTube
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What output tube would use use to drive the relay for the soft start or HT turn-on delay? That’s normally where you *want* a 555, isn’t it?,
Well, why not challenge ourselves a bit and go straight to a vacuum tube digital clock? 😀
Digitale Nixieröhrenuhr von Friedhelm Bruegmann
The worst part is that back in the day those folks over at Tektronix would have this thing built in a day...
Digitale Nixieröhrenuhr von Friedhelm Bruegmann
The worst part is that back in the day those folks over at Tektronix would have this thing built in a day...
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18 tubes for a 555 timer "IC". That's on the order of 50-60 W just in the heaters. 🙂
Don't forget to account for the warmup time if you use it in a timer application.
Tom
Don't forget to account for the warmup time if you use it in a timer application.
Tom
My lovely old 1963 RCA Victor stereo console has 18 tubes too.
But it's much more musical. 😉
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The relay driver tube of choice in those old ultrasonic TV remotes of the 60's was a 12FV7. It's like a 12BH7 on steroids.
The remote itself was completely mechanical. A little hammer would strike a metal cylinder to generate a tone that could activate a motorized drive on the tuner, or volume control.
The receiver used a few tubes with a microphone to pick up these ultrasonic tones and turn on a motor via a relay.
A devious kid with a hand full of change, or a ring of car keys in a department store could drive all of the TV's crazy.
Don't laugh, those 1960's TV and console stereo remotes also had tuning forks that were hit by a button press - Magnavox, Sylvania, Zenith's "Space Command", early Philco's used a squeeze bulb with a rubber hose to the set.
And now look at us!
A bunch of old farts that can't get our azzs off the sofa.... just tap a button!
Ok, we can go back to using them when IR remotes are determined by the State of California to cause cancer, birth defects or other reproductive harm.
You have been selected as the first one to build a tube 555 and put it to work in a useful project! Unless someone who actually has one of those thyratrons in their stash speaks up. If George had some he’d be bragging and showing us pictures of nefarious uses fir them.
Who is up for building a tube Commodore 64? I’d pay good money to see that. I’ve heard of people building those out of 7400 logic, albeit with kHz clock rates. You *san* emulate all those with tubes, no harder than the 555. Just takes someone crazy and determined enough to do it.
You have been selected as the first one to build a tube 555 and put it to work in a useful project! Unless someone who actually has one of those thyratrons in their stash speaks up. If George had some he’d be bragging and showing us pictures of nefarious uses fir them.
Who is up for building a tube Commodore 64? I’d pay good money to see that. I’ve heard of people building those out of 7400 logic, albeit with kHz clock rates. You *san* emulate all those with tubes, no harder than the 555. Just takes someone crazy and determined enough to do it.
