What's this digital logic circuit doing and why?
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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Binary counter?
Strange how things are linked. My guess may be way off, but after my comment below about Eccles – Jordan, I looked that up on Wikipedia. Look what I found:
"The first electronic flip-flop was invented in 1918 by the British physicists William Eccles and F. W. Jordan.[3][4] It was initially called the Eccles–Jordan trigger circuit and consisted of two active elements (vacuum tubes).[5] The design was used in the 1943 British Colossus codebreaking computer[6] and such circuits and their transistorized versions were common in computers even after the introduction of integrated circuits, though flip-flops made from logic gates are also common now.[7][8] Early flip-flops were known variously as trigger circuits or multivibrators."
Eccles and Jordan were British and the design was used in your Colossus computer. I am a great fan of this stuff and looking forward to see Bletchly soon.
My Guess: The white LED read the clock pulses produced by the 555 timer. The other 2 chips are set up as a flip-flop (does that term date me?) The red and green read the state of the flip flop, effectively dividing by two. When I was about 13 or 14, I built one of these using a 6SN7. It was part of a count by 10 scheme called an Eccles Jordan circuit.
Love your videos mate! not related to this video but you should check out the dp50v2a buck module with a really good lcd display. seems like a step up from the b3603 with an easy interface. I found it on aliexpress for about 25$ so not really too expensive either. would be nice to have it reviewed on this channel. cheereo
A Flip-Flop logic circuit, I didn't look up the chips, I just made a blind guess seeing the LEDs, a flip flop running off a 555 chip, the other two buttons were a dead give away.
It looks to me like you've halved the speed of the 555 timer
randomiser or something?
Such a tease. ;p
Latches or counter probably.
Counting unicorns?
That would make great model railroad crossing lights! The timing and signals are perfect! the green led is exactly when the bell rings, and the two red are of course the two red flashers. At least here in the continental USA that's how they are.
It's live Jim, but not as we know it!
This is a long shot but you don't by any chance mean Derek Molloy?
Looks like you are using the tantalum cap as a timer and the other chips to modify the output. The switches probably filp-flop. That's just off the top of my head, can't be bother to go lookup the actually chips….
a binary adder on a loop or something? For like an alarm?
Did this fall of Santa's sleigh when deliverin the pressies ?
A electric logic circuit!?!
Well I guessed 1 of the ic 555 but I haven't got a clue what the others are yet.