The 220 V mains is closed by the power switch SB, the resistors R1 and R2, and the potentiometer RP constitutes a voltage dividing circuit, and the capacitor C3 is charged after the voltage is divided. When C3 is charged to a certain value, the bidirectional diode VD5 is turned on, and a trigger pulse voltage is output to the triac VS trigger pole, the VS is triggered to conduct, and the output end outputs a controlled pulsating DC voltage to supply the DC motor M. The motor M is rotated by electricity to drive the massage head to perform a massage action.
Changing the resistance of the potentiometer RP, that is, changing the charging time constant of C3, essentially changes the conduction angle of the triac VS, and realizes the regulation of the speed of the direct current motor M.
The switch ST is a DC motor M steering control switch, and when ST selects "forward", the DC motor M rotates clockwise. When "reverse" is selected, the motor current direction is changed by changing the direction of the motor current, and the direct current motor M is rotated counterclockwise.
Product advantages:
1. Stylish, portable, practical and convenient home charger
2. 6-port USB emergency charger, which can be used safely for tablet computers and can charge 6 devices at the same time
3. Built-in IC chip and fuse, protection: over current, over voltage, short circuit protection
4. The latest release, new design, beautiful appearance, high efficiency and energy saving, the best alternative to the original charger
5. Chargers for MP3, MP4, GPS, PDA, e-books, mobile phones, digital cameras, tablets, etc.
Features
(1) Overcharge protection
(2) Over discharge protection
(3) Short circuit protection
(4) Voltage stabilization protection.
(5) Automatic identification of mobile phone current protection.
1. Connect up to 6 USB devices at a time, and each device will receive a unique and tailor-made charge. The maximum output power of QC3.0 is 18W, which can optimize the charging of all devices.
2.2QC3.0+4 ports total 6 charging ports, which can charge 6 devices with a total power of 84W at the same time
3. With multiple protection safety systems, the product will automatically adjust the charging current according to the needs of the device being charged. Automatically detect and adjust the charging current to charge your device at the fastest speed.
One machine for multiple uses
The USB charger can charge 6 devices at the same time, and the smart recognition technology will detect and provide the best charging level for each of your devices.
The maximum output current of a single USB port is 2.4A. 2QC3.0 has 6 charging ports, which can charge 6 devices at the same time without causing shunting or reducing power. The USB charger can quickly charge your devices. Smartphones and tablets can receive up to 2.4 amps of current, so you can use the device as you like while charging.
Over-current, over-charge, and short-circuit protection will make charging safe, without any risk of overheating or damaging the device. Passed CE/FCC/ROSH/PSE/CCC certification. Through safety certification to ensure safe use.
Usb Charger,Usb C Charger,Usb C Power Adapter,Portable Usb Charger
Shenzhen Jinziming Electronic Technology Co.,LTD , https://www.powerchargerusb.com