Mobile education & repairing - Circuit Components: 7805 regulator U1 Resistors R1 1N4007 diode D1 Capacitors C1,C2 BC 547 transistors Q1,Q2 7404 IC U2 Light Dependent Resistor Buzzer BUZ1 Light Emitting Diode
![VILLCASE DT-830D Digital Multimeter with Buzzer Square Wave Output Voltage Ampere Ohm Tester Probe Diode and Transistor Testing DC AC LCD Overload Protection: Amazon.com: Tools & Home Improvement VILLCASE DT-830D Digital Multimeter with Buzzer Square Wave Output Voltage Ampere Ohm Tester Probe Diode and Transistor Testing DC AC LCD Overload Protection: Amazon.com: Tools & Home Improvement](https://m.media-amazon.com/images/I/616j1Z0IoCL._AC_UF1000,1000_QL80_.jpg)
VILLCASE DT-830D Digital Multimeter with Buzzer Square Wave Output Voltage Ampere Ohm Tester Probe Diode and Transistor Testing DC AC LCD Overload Protection: Amazon.com: Tools & Home Improvement
![piezoelectricity - What's the function of the diode in this driver connected to a piezo buzzer? - Electrical Engineering Stack Exchange piezoelectricity - What's the function of the diode in this driver connected to a piezo buzzer? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/JBDbW.png)
piezoelectricity - What's the function of the diode in this driver connected to a piezo buzzer? - Electrical Engineering Stack Exchange
![Set Diode In Electronic Circuit, Buzzer And Solar Energy Panel Icon. Vector Royalty Free SVG, Cliparts, Vectors, And Stock Illustration. Image 198447483. Set Diode In Electronic Circuit, Buzzer And Solar Energy Panel Icon. Vector Royalty Free SVG, Cliparts, Vectors, And Stock Illustration. Image 198447483.](https://previews.123rf.com/images/fillvector/fillvector2301/fillvector230113494/198447483-set-diode-in-electronic-circuit-buzzer-and-solar-energy-panel-icon-vector.jpg)
Set Diode In Electronic Circuit, Buzzer And Solar Energy Panel Icon. Vector Royalty Free SVG, Cliparts, Vectors, And Stock Illustration. Image 198447483.
![Set Line Buzzer in Electronic Circuit, Electrical Outlet, Diode, Tower Line, Power Button, Cloud and Lightning, Table Stock Illustration - Illustration of component, transmission: 258280140 Set Line Buzzer in Electronic Circuit, Electrical Outlet, Diode, Tower Line, Power Button, Cloud and Lightning, Table Stock Illustration - Illustration of component, transmission: 258280140](https://thumbs.dreamstime.com/z/set-line-buzzer-electronic-circuit-electrical-outlet-diode-tower-power-button-cloud-lightning-table-lamp-high-voltage-icon-258280140.jpg)
Set Line Buzzer in Electronic Circuit, Electrical Outlet, Diode, Tower Line, Power Button, Cloud and Lightning, Table Stock Illustration - Illustration of component, transmission: 258280140
![piezoelectricity - What's the function of the diode in this driver connected to a piezo buzzer? - Electrical Engineering Stack Exchange piezoelectricity - What's the function of the diode in this driver connected to a piezo buzzer? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/bQcVk.jpg)