For middle school science experiments, electronic instruments, negative ion generator, science and small production.
When it operate in the air, no crackling sound, but the temperature is very high, can easily ignite paper, plastic, even very fine wire.
The transformer primary has two windings, one main winding and one feedback winding. Made of quality material, which is durable and for long time use.
The two thick and fine coiled copper wires are the positive poles, which are respectively the main winding tail and the feedback winding head, connected to the positive poles of the power supply.
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