Sealing machine can be wide and wide
Capacitor C1 filter, to the machine to provide power supply. The power supply by R4, VR to C2 charge. Charging early, C2 voltage is very small, the transistor Q was cut off, the collector is high, the resistance R6 and LED
. When the switch K is closed, the AC power is reduced by R1 and R2, and the diode D1 is rectified.
The mouth of the maximum length of 200mm (for reference only). It has an operating handle, its role in two: First, press the handle, the plastic bag to be sealed on the heating bar, the second is to press the power switch K to close
The LED triggers the triac SCR, the transformer T is energized, and the other is the power supply to the heating element RL, which is sealed by the plastic bag which is pressed on the RL to be heated to cause the transistor Q to turn on and the collector voltage is reduced,
