Joule Thief Cat

An adorable but mischievous cat who feeds on electricity, using every bit of energy left in discharged batteries.

An energy harvesting friend

Insert your discharged AA battery (or AAA using the optional adapter) from your remote controller, multimeter, or other appliances, to give it a second life and light up the eyes of the Cat! But first you must help him get his parts back in place!

The Joule Thief Cat is a beginner-friendly soldering kit. All the parts are through-hole, and are included.

Find assembly instructions here

In the Package:

• 2x Yellow LEDs
• 1x Transistor
• 1x Capacitor
• 1x Resistor
• 1x Diode
• 2x Wires
• 1x Ferrite
• 1x Battery holder
• Joule Thief Cat PCB

Not included:

• AA Battery (due to shipping regulations)

We are shipping all our products through royal mail economy, which is about ~1 week for EU orders and 1 to 3 weeks for US orders - however we are seeing a lot of additional delays in the last few months, we apologies for the incovenience.