This Small Module Uses The LTC3588 Piezoelectric Energy . This Small Module Not Only Collects Piezoelectric Energy, But Also Solar Energy. There Is A Bridge That Can Turn The Input Into Piezoelectric Elements (PZ1 And PZ2), And Can Turn The Direct Input (Vin) Into A Dc Source. Both Bridges Draw Currents Within 20 Volts. Additionally, This Board Can Be Used Alone As A Buck Regulator. It Has An Ultra-Low Quiescent Current Undervoltage Lockout Mode, Which Has A Large Leakage Window That Can Collect The Charge Of The Input Capacitor, And The Buck Regulator Can Drain Out The Accumulated Power. Generally Speaking, When The Ltc3588 Enters The Sleep State, The Input And Output Quiescent Currents Are Very Small. The Buck Regulator Is Automatically Enabled To Normal Operation. The Interface Can Selectively Connect To Four Output Voltages (1.8V, 2.5V, 3.3V And 3.6V), And Its Output Current Is A Constant Current Of 100mA. However, The Output Capacitor May Suddenly Discharge Higher Current. Therefore, We Set Up A 20-Volt Input Guard Shunt, Which Allows The Existing Input Capacitors To Store More Charge. Type:Energy Collector Module 1. 950nA Quiescent Input Current (Output Current - Usually No Load) 2. 450nA Quiescent Input Current (Undervoltage Lockout Mode) 3. 2.7V-20V Input Operating Range 4. Integrated Low-Loss Full-Wave Bridge, Output Current Up To 100mA 5. The Output Voltage Is Selectable, 1.8V, 2.5V, 3.3V And 3.6V 6. High Efficiency Integrated Hysteresis Buck DC/DC 7. Input Protection Tributary - Up To 25mA Reverse Bias Current, Input Voltage Is 20V 8. Wide Undervoltage Lockout Range Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Colour:As Shown Material:PCB Package Contents: 1 *Energy Collector Module 2 * Pin Header Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.