Introduction: Bike Volt

This report explains step by step how the project was constructed. Bike- Volt consists in a voltage rectifier that takes AC from a dynamo (that works with the wheel spin of a bike) and rectifies it (DC) in order to supply voltage for cellphone charging.


-1 dynamo.

-4 diodes (1N4007).

-1 capacitor 100 uF at 35 volts.

-Tip 32C (PNP).

-Power dissipater (spider).

-Pottery resistor 2W- 100RJ

-1 regulator (LM7805).

-1 capacitor 10 uF at 63 volts.

-1 capacitor 0.1 uF at 250 volts.

-1 female USB port.

Step 1:

In a protoboard, put four diodes in the same order as picture or build a diodes bridge.

Note: Protoboard with four 1N4007.

Step 2:

Connect two wires (cathode-cathode and anode-anode) with any of the possible nodes to make a parallel circuit and wire the capacitor.

Note: The first wire is to make a positive terminal and the second wire is to make a ground terminal. Remember that is the capacitor of 100uF at 35 volts.

Step 3:

Connect the transistor Tip 32C.

Note: This transistor is a PNP configuration, so do not forget to connect it in the same order as the datasheet explains.

Step 4:

Wire the resistor in parallel with the first pin of the transistor and the last pin of the transistor.

Note: We are going to simulate that is a pottery resistor because we need it with a capacity power of 2 watts.

Step 5:

Connect the voltage regulator.

Note: Remember, first pin-input signal, second pin-ground and third pin-rectified signal.

Step 6:

Wire the capacitor, in parallel.

Note: Use the active nodes to wire in parallel the capacitor of 10 uF at 63 volts.

Step 7:

Connect the capacitor(104), in parallel to regulate the peaks of the dynamo.

Note: The 104 capacitor does not have negative or positive terminals. It does not matter the way you polarized it.

Step 8:

Connect a female usb in parallel with the capacitor (104).

Note: Check out the datasheet of the female usb for an appropriate connection.

Step 9:

This is the final step. Connect the dynamo to the circuit (cathode-anode, cathode-anode).

Note: The motor will simulate our dynamo. You can connect any AC source to have an output of 5 volts.

Step 10: URL for the Demonstration of the Circuit

MAKE ENERGY: A US-Mexico Innovation Challenge

Participated in the
MAKE ENERGY: A US-Mexico Innovation Challenge