The circuit principle of the sealing machine
When the switch K is closed, the AC power by R1, R2 buck, diode D1 rectifier.
It has an operating handle, its role has two: First, press the handle after the pressure, will be sealed plastic bags on the heating bar, the second is to press the power switch K to close.
The machine nominal heating power 350W, sealing the maximum length of 200mm.
Charging early, C2 on the voltage is very small, the transistor Q was cut off the state, the collector is high, the resistance R6 and LED LED trigger triac SCR, transformer T power.
Capacitor C1 filter, to the machine to provide power supply.
