This is my first instructable so be kind. I wanted to make a hand warmer that was battery powered and rechargeable. I welcome any and all criticism. If you have any questions please feel free to ask.
Step 1: Parts List
Tools & Parts
- Heat resistant tape
- Hot glue gun
- Soldering iron
- Balsa wood
- 28 awg wire (about three feet)
- AA battery holder
- Cover cloth
- AA batteries
Step 2: Prep Work
- Start by outlining the battery holder on the balsa wood with a pencil. You will want to leave about 1/2 inch extra on the length to make room for the switch.
- Cut the stenciled rectangle out with a knife.
- Take 3 ft. of wire (I used 28 gauge copper bead wire) and wrap it around the wood (be sure to keep the wires from touching as you spiral it across the balsa).
- Tape the ends of the wire with a heat resistant tape to the wood.
Step 3: Install and Drive on!
- After finding a suitable place for the copper wire heating source. You will need to cut an appropriate slot for the switch.
- After prepping the switch, glue in place with either hot glue or “CA”.
Step 4: Glue and Solder
- Solder all connections in place and prep for the cloth cover. (heat resistant tape is amazing at this stage)!!!
Step 5: Finish with Hot Glue
- Hot glue the cloth to cover the heating coils.
- Make sure to wrap fully around the heating coils(Don’t worry, the coils should not produce enough heat to cause harm… theoretically around 100 -140 degrees Fahrenheit)
- After the cloth is secure, hot glue the heating aspect to the battery holder.
- It should last between 1 and 2 hrs.
- Enjoy the warmth during the winter!!!!!!
(Disclaimer: Ensure to properly check connections and aggregate temperature).