LFTT (LED Flashie Throwie Thingie)

You may already know the LED throwies

The LED Throwies are very cool, however they could be a little more attention getting with just 2 extra components.

This Instructable will show you how to make a flashing LED Throwie.

To make one LED flashie you'll need:

a 10mm LED (I recommend, that you use a diffuse LED. I live in Denmark and the diffuse LEDs aren't available here, so I just used a waterclear type)

a CR2032 lithium coincell battery.

a Neodymium (NdFeB) disc magnet.

a LM3909 LED Flasher circuit

an Electrolytic capacitor (the bigger the capacitor is, the slower the LED flashes. I figured out, that a 100µF works fine. It will flash the LED at approx. 2.5Hz, while a 220µF will flash it with 1Hz.

Now it's time to Solder the capacitor onto the LM3909 (see all the pictures)

Now it's time to solder the LED onto the LM3909 (see pictures)

Cut off the unused leads of the LM3909, so they don't short circuit.

Now it's time to Solder two leads onto pin 4 and 5 of the LM3909.

You can "mold" the circuit using a hot glue gun. This will make it water proof and shock resistant.

Tape the battery and the magnet onto the circuit, just like you would do with an ordinary LED Throwie

It's time to throw your LED flashie