Circuit board demo showing flashing LEDs and a counter. There is also a knob that can control flash and count rate. Flashing lights are fun to build and watch!
How It Works:
Lower left subcircuit is an op-amp astable multivibrator that generates a pulse waveform (square wave)… more like _–_–_–_–_–_–_–_. The pulse rate is determined by the resistor and capacitor values around that subcircuit.
Each side of the waveform turns on certain LED lights. Waveform directly powers the red LEDs.
Then, there are frequency dividers that cut the frequency in half. This doubles the light-time for the yellow LEDs and hence slows the flash rate. Frequency gets cut in half once more to light the green LEDs, which should flash the slowest.
There is also a 7-segment display (counter) that increases by 1 each time the red LEDs flash one full cycle.
Initial flash rate can be controlled by turning the variable resistor (potentiometer).
Duration : 0:0:33
[youtube R9U0Fsr2kAE]
agreed…there are …
agreed…there are much more rewarding things to do than sit around watch celebs.
I can see that the …
I can see that the LEDs are blinking in binary. The reds are the lowest column, the yellows are the middle, and the greens are the highest. You’re using a binary to 7-segment chip to run the number display off of the binary count right?
What’s this video? …
What’s this video? you was trying a Ne555 timer, or similar?
how to create the effect of yellow leds? thanks.
if i hook up a …
if i hook up a capacitor to a battery and aled to the capacitor and awore to the battery again will the led blink?
great comment
great comment
lol
lol
Stick it in a car …
Stick it in a car with loads of home made explosives and petrol and it’ll go boom.
Oh no, i think i just commited a thought crime :/
Oh c’mon. Give the …
Oh c’mon. Give the guy a break. There are people out there wasting their entire lives watching ego wanking celebrities get off for a pass time on youtube so what’s another 34 seconds wasted gonna matter to you i or anyone else
i agree
i agree
that was the most …
that was the most boring video I’ve ever seen in my life
5/5
5/5
lol that would have …
lol that would have been funny and cool if you turned the wheel and it went BOOM! but either than that thats amazing!
OK! Great!
OK! Great!
Neat project!
Neat project!
wow what a waste of …
wow what a waste of 34 seconds
perfect as cristmas …
perfect as cristmas lights w/ a bigger display!
that was kinda …
that was kinda stupid
Well…gee …
Well…gee whillikerzth!
uh ok
uh ok