Sparkly Christmas decoration electronic circuit. Uses 19 LEDs, 19 NPN transistors, 39 resistors, 19 capacitors and a 9V battery. Merry Christmas.
By Julian
Youtuber, shed dweller, solar charge controller aficionado
Good morning all…
Youtuber, shed dweller, solar charge controller aficionado
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really cool! showing off propagation delay!!!
What is the rationale of using the NPN transistor as a high side switch? Generally the load (LED in this case) is placed on the collector, not the emitter.
An absolute gem of a video this one (of many)..I'm having a bit of a J Ilett box set binge….theses are great when we have howling wind and rain outside, and down south we have that in abundance at the mo.
Some time back I ran across an item on ebay that featured a heart-shaped circuit board with LEDs around the periphery. The oscillator that drove them consisted of only 3 transistors, probably in a very similar configuration, as the LEDs were all wired in groups of 3. Built that just in time for Valentine's day one year… 🙂
Cool to see
Superb
Curses, I've run out of capacitors … those Chinese assortment offers are useless!!
Depending on where you input the feedback will depend on how quickly it double cycles. Your example goes counterclockwise and when you move in that direction with your feedback input everything counterclockwise of that gets a double input. Once at the beginning and then again when the original input comes around the circuit. Hence the different rate of perception. in theory this could act as a perpetual booster. Giving me ideas now.
Since you have 19 identical circuits, inquiring minds want to know how the circuit decides which of the 19 gets to initiate the LED anti-anti-reverse irrigation… I mean 'forward flow'
Warm white or amber LEDs reflected off of the gold letters would look really good.
Cool
SMD parts and you can probably make the circuit fit on the back of the LED!
Needs a peltier element and some cowbell in there somewhere 🙂