Some resources to help you getting started with STM32 programming.
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This is a high quality screw driver/tester, unlike the cheaper variants which get wear down easily while opening a tight screw.
Testers are one of the simplest solutions, used to test current and voltage continuity in any circuit. Indispensable for any electrician, the testers are very simple and interesting devices. This article will explore the internal structure of one such commonly used circuit tester.
In order to test the live wire, the user’s body must be in contact with the metal cap on the top of the screwdriver when the tester is put in contact with the wire. This completes a genuine electrical circuit and the bulb will light up once the tester senses voltage.
The core of the tester is located near the head of the screwdriver. The plastic casing under which the tester circuitry is placed serves as an insulator. As the metallic rod is the conductor part of the tester, in order to protect the user from getting an accidental electric shock, a thick sheath of plastic insulator is placed over metallic rod.