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hpr2645 :: Blinking LED

In this live show, Ken sees if he can follow simple instructions

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Hosted by Ken Fallon on 2018-09-21 is flagged as Explicit and is released under a CC-BY-NC-SA license.
555, NYBill, pico, nano. 2.
The show is available on the Internet Archive at:

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Duration: 00:23:10

Hobby Electronics.

Building electronic devices and kits, repairing electronics and learning about components and their uses.

During the New Year Show Ken soldered a component tester. Unfortunately this did not work.

NYBill offered to fix it and he succeeded in his show hpr2591 :: International Troubleshooting. When he shipped it back he included two 555 timers with the message: Now, figure out how to make LED's blink with those 555's!

In this show Ken uses the online guide FLASHING L.E.D. USING 555 TIMER By Trilesto to do this.


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Comment #1 posted on 2018-09-21 19:50:13 by NYbill


Ha ha, nice job Ken. It made me smile when I heard you happy it was finally blinking. And we got some live troubleshooting as well! Good stuff.

You know how I remembered which way a LED went way back when... One leg of the LED is cut off. 'Cut Off' starts with a 'C'. So does Cathode. The short leg is the cathode. If you had your leg cut off, that would be a pretty negative thing. The short leg is negative.

Just a little mnemonic device I made up to help me remember. I still think of it to this day.

Now, you just need to build one of the oscilloscope kits. You know, to see how fast your LED is blinking.

See how I did that? Its how we get more shows. ;)

Comment #2 posted on 2018-09-22 04:42:42 by tuturto

great show

These troubleshooting shows are one of my favourites. I did tinker just a tiny bit with electronics at school, but never invested enough time to really understand what electricity is all about. Especially the analog electronics is sort of black magic to me :)

But I love listening when someone is working with it, explaining what they're doing and slowly working their way through a problem.

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