Introduction: Electricity Generating Shoe Insole
In this instructable I will show you how to make a shoe generator. What is a Shoe generator? A shoe generator ia a device that generates electricity from walking / running or any sport that you have to walk/run in.
Link for the remix contest: https://www.instructables.com/id/Electricity-Generating-Footwear/
Step 1: Materials
Here are the parts and tools that you will need to make this project:
Lithium ion battery and charger
Rectifier diodes (x4) or bridge Rectifier
Sticky foam tape
5v step up converter with built in USB (Advanced)
3d printer and filament
Hot glue gun and hot glue
Soldering iron and solder
Step 2: How It Works:
How this insole works is that when electricity is applied to a piezo buzzer it buzzes, when force is applied to it it generates a small voltage in alternating current. Because most small devices use DC we need to convert AC to DC so to do this I have a bridge rectifier. Now that we have DC power we still need to charge the internal battery in the ankle band so we need a battery charger so we don't damage the battery. Since most small devices use 5v we can convert it using a 5v step up converter. now we have constant 5v power coming from the ankle band we can power USB lights or other small gadgets. the only con is that the internal battery is small so it discharges quickly but can power a flashlight aslong as you are walkng and will last for about 30 minutes after you completely stop walking.
Step 3: Wire Circuit
Wire the circuit as shown in the fritzing image:
Step 4: 3d Print Parts
Step 5: Wire Piezo
Solder 2 long wires to the piezo. This will go to the circuit in the ankle band.
Step 6: Insert Piezo Buzzer in Sole
Place the piezo buzzer in the hole of this 3d printed part and tape it down with foam tape, tape it down on both sides this is so the buzzer doesnt move out of the hole. The foam also protects the buzzer from breaking. It is VERY important that you have the foam tape and not any others because the buzzer will break after about a week after use from not being cushioned!
Step 7: Fit Electronics
Fit all of the electronics in the ankle strap part. Run the 2 output wires through the hole at the side of the box. Then run the wires coming from the piezo through the hole at the bottom. My battery charger circuit was one of the biggest parts so I put is at the bottom and the bridge rectifier circuit (diodes) at the top.
Step 8: Place Top on Ankle Band
Place the top piece on the ankle part and tape or glue it on.
Step 9: Attach Elastic Fabric
Push the elastic fabric through the slits on the side of the case. Measure and cut the fabric so it is tight around your ankle and add some velcro at each end.
Step 10: Add Step Up Converter (Advanced)
In this step you wire the output wires to the 5v step up converter, this will boost the voltage from the battery to 5 volts which can power a phone if you have a bigger battery.
Wire the positive output wire to the positive input pin of the step up converter then wire the negative output wire to the negative pin on the step up converter. Solder a wire to the positive output pin and another wire that goes to the ground pin on the step up converter nw you can hook up something that uses 5 volts and has a low current draw.
Step 11: Done!
Congrats! You have completed this instructable, please favourite comment and follow!
To use it put the 3d printed piece with the piezo in your shoe and then put uor foot in the shoe and put the ankle strap around your ankle and secure with the velcro.
If you had any problems making this instructable I can help out just tell me what isn't working and I will help.