Emergency equipment for power outages is standard in many households. An innovative approach now combines 3D printing with simple electrochemistry to create a torch that can be stored for a long time. Maker JGJMatt’s project shows how to build a battery that is only activated by adding water when needed.
The core of the project is a self-printed battery. Magnesium tape serves as the anode, while copper tape forms the cathode. Both materials are placed in a 3D-printed housing. Cotton wool acts as a storage medium for the electrolyte – in this case simple tap water.
The battery is combined with an LED circuit in a separate 3D-printed housing. In an emergency, the torch is assembled and the battery is immersed in water. This activates the electrochemical process and generates about 4.5 V at 20 mA – enough to power the LED.
Although the brightness is limited and conventional battery-powered torches should be more reliable, the project demonstrates basic principles of electrochemistry. It shows how simple batteries are at their core and could serve as an educational experiment for children interested in technology.
He has published the introduction to his development on Instructables.
Subscribe to our Newsletter
3DPresso is a weekly newsletter that links to the most exciting global stories from the 3D printing and additive manufacturing industry.
