Circuit Documentation

Summary

This circuit is designed to utilize multiple piezo sensors to generate AC voltage, which is then rectified and boosted to power an ESP32 microcontroller and a bulb. The circuit also includes a current sensor to monitor the current flow.

Component List

1. Piezo Sensor

   • Description: Converts mechanical energy into electrical energy.
   • Pins: +, -

2. Bridge Rectifier

   • Description: Converts AC voltage to DC voltage.
   • Pins: AC input +, AC input -, +, -

3. 1000uf/25V Capacitor

   • Description: Smooths the rectified DC voltage.
   • Pins: +, -

4. DC-DC Boost Converter

   • Description: Boosts the DC voltage to a higher level.
   • Pins: VIN-, VIN+, VOUT+, VOUT-

5. 18650 Li-ion Battery x 2

   • Description: Provides power to the circuit.
   • Pins: +, -

6. ESP32 (30 pin)

   • Description: Microcontroller for processing and control.
   • Pins: EN, VP, VN, D34, D35, D32, D33, D25, D26, D27, D14, D12, D13, GND, Vin, D23, D22, TX0, RX0, D21, D19, D18, D5, TX2, RX2, D4, D2, D15, 3V3

7. Current Sensor 5A

   • Description: Measures the current flowing through the circuit.
   • Pins: 1, 2, GND, OUT, VCC

8. Bulb

   • Description: Indicates the presence of power.
   • Pins: +, -

Wiring Details

Piezo Sensors

• + Pins: Connected to the AC input + pin of the Bridge Rectifier.
• - Pins: Connected to the AC input - pin of the Bridge Rectifier.

Bridge Rectifier

• AC input +: Connected to the + pins of all Piezo Sensors.
• AC input -: Connected to the - pins of all Piezo Sensors.
• + Pin: Connected to the VIN+ pin of the DC-DC Boost Converter and the + pin of the 1000uf/25V Capacitor.
• - Pin: Connected to the VIN- pin of the DC-DC Boost Converter and the - pin of the 1000uf/25V Capacitor.

1000uf/25V Capacitor

• + Pin: Connected to the + pin of the Bridge Rectifier and the VIN+ pin of the DC-DC Boost Converter.
• - Pin: Connected to the - pin of the Bridge Rectifier and the VIN- pin of the DC-DC Boost Converter.

DC-DC Boost Converter

• VIN+: Connected to the + pin of the Bridge Rectifier and the + pin of the 1000uf/25V Capacitor.
• VIN-: Connected to the - pin of the Bridge Rectifier and the - pin of the 1000uf/25V Capacitor.
• VOUT+: Connected to the Vin pin of the ESP32, the + pin of the 18650 Li-ion Battery, and the + pin of the Bulb.
• VOUT-: Connected to the - pin of the 18650 Li-ion Battery and the 2 pin of the Current Sensor.

18650 Li-ion Battery x 2

• + Pin: Connected to the VOUT+ pin of the DC-DC Boost Converter, the Vin pin of the ESP32, and the + pin of the Bulb.
• - Pin: Connected to the VOUT- pin of the DC-DC Boost Converter and the 2 pin of the Current Sensor.

ESP32 (30 pin)

• GND Pin: Connected to the GND pin of the Current Sensor.
• Vin Pin: Connected to the VOUT+ pin of the DC-DC Boost Converter and the + pin of the 18650 Li-ion Battery.
• 3V3 Pin: Connected to the VCC pin of the Current Sensor.
• D34 Pin: Connected to the OUT pin of the Current Sensor.

Current Sensor 5A

• 1 Pin: Connected to the - pin of the Bulb.
• 2 Pin: Connected to the - pin of the 18650 Li-ion Battery and the VOUT- pin of the DC-DC Boost Converter.
• GND Pin: Connected to the GND pin of the ESP32.
• OUT Pin: Connected to the D34 pin of the ESP32.
• VCC Pin: Connected to the 3V3 pin of the ESP32.

Bulb

• + Pin: Connected to the VOUT+ pin of the DC-DC Boost Converter and the + pin of the 18650 Li-ion Battery.
• - Pin: Connected to the 1 pin of the Current Sensor.

Documented Code

ESP32 Code (sketch.ino)

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Additional Documentation (documentation.txt)