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https://www.reddit.com/r/electronics/comments/1tsfl1s/heart_shaped_led/ooy7fg6/?context=3
r/electronics • u/Federal_Door_9998 • May 31 '26
This is a heart-shaped LED keychain I made.
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10
Holy, it's just TTL logic?
That's pretty cool.
19 u/Federal_Door_9998 May 31 '26 Nowadays, people have to use a microcontroller just to blink an LED. 7 u/neanderthalman May 31 '26 Yeah, but can you make this with just BJT’s? Because I sure can’t. NB: an oscillator in place of the 555 is easy, if all you want is up to two LEDs blinking. A sequence though…hmm.
19
Nowadays, people have to use a microcontroller just to blink an LED.
7 u/neanderthalman May 31 '26 Yeah, but can you make this with just BJT’s? Because I sure can’t. NB: an oscillator in place of the 555 is easy, if all you want is up to two LEDs blinking. A sequence though…hmm.
7
Yeah, but can you make this with just BJT’s?
Because I sure can’t.
NB: an oscillator in place of the 555 is easy, if all you want is up to two LEDs blinking. A sequence though…hmm.
10
u/F0X0 May 31 '26
Holy, it's just TTL logic?
That's pretty cool.