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*sorry misspoke, you need to control the gate relative to the SOURCE!!! Simple circuit field-effect transistor instead of a relay. Let's consider how to put a field-effect transistor instead of a relay, toggle switch or button to control a large load on direct current. For example, in a car or any other device. Link for donations https://www.donationalerts.com/r/snya... #field #transistor #relay #circuit #homemade #radio amateur