This design comes from Circuit City! ()
Introduction:
Input 22V AC, output positive and negative 15V and positive 5V voltage. The output voltage is connected and filtered by the size capacitor, and the voltage is stable.
Design description:
Draw a PCB with Altium Designer 09.
Description:
The circuit documentation is included in the attachment.
More circuit function description and data download: DC stabilized power supply
The mechanical Buzzer uses a magnet to move a reed up and down quickly to emit a lower-pitch buzz! It's quieter than the piezoelectric buzzer but uses more power, so you the terminals will have to be closer to the battery packs. To use them, you'll need to match the wire colors to the wires from the battery pack.
Piezo Beeper,Mechanical Buzzer,Piezo Mechanical Buzzer,Low Frequency Mechanical Buzzer
Jiangsu Huawha Electronices Co.,Ltd , https://www.hnbuzzer.com