The common circuits of electric tweezers are as follows:
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(1) Simple universal electric tweezers
The electric dice are not temperature-adjustable, and the electric heating element is directly connected to the alternating current power source to generate electric heat. For short-circuit protection, the fuse is connected in series in the circuit, as shown in Figure 236. When used, the temperature is manually controlled. When the temperature rise is too high, the power switch K must be manually judged, no current flows through the electric heating element RL, and the electric scorpion stops heating. After a while, if the temperature drops too low, the power can be turned on again. Obviously, this temperature control method is cumbersome, but it is simple to manufacture and low in cost. In the figure, RD is a fuse.
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