Make: "Mad scientist test-tube rack"


#1

Originally published at: http://boingboing.net/2016/10/17/make-mad-scientist-test-tub.html


#2

The project uses a Feather microcontroller to shine UV LEDs into test-tubes filled with water doped with elements that fluoresce under UV.

Couldn’t you accomplish that with a device called a copper wire? How many microprocessors does it take to turn on a light bulb?


#3

Relevant XKCD


#4

But they flash on and off!

Kids these days, can’t flash an LED without a microcontroller.
Haven’t they heard of a 555 timer? Why when I was younger we had to use two transistors to make a multi-vibrator, and we LIKED it!
And before that we relays. They made a nice clicking sound.

:slight_smile:


#5

Relays? Luxury! Why, we had to open and close the shutter on the lantern!


#6

LANTERN! How well off must you have been.

We had a single candle we had to repeated light and blow out.

Edit: AND we were HAPPY about it.


#7

Some unique cryptozoological foeti in each tube would be a nice finishing touch.


#8

Oh, that’s perfect!


#9

CANDLE?! Why we couldnt scrape together the earwax for one of those!

We had to beat each other senseless if we wanted to see flashing lights.


#10

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