Metal Detector Circuit Diagram - metal detector circuit diagrams and projects note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy this is my version of a pulsed induction type of metal detector i named it blind squirrel because even a blind squirrel finds an acorn every now and then the circuit is using a 555 timer ic a 2n3819 fet field effect transistor with some resistors and capacitors the 2n3819 transistor is working as ac field detector and the beeper circuit is 31 100 nike 8 here is anther version of the metal detector using a coil that is printed on the fibre glass pc board the circuit is not very sensitive circuitstune provides a huge collection of electronics circuit diagram wiring schematic diagram and pcb layout of inverter lifier power supply etc description this circuit will detect ac line currents of about 250 ma or more without making.

any electrical connections to the line current is detected by passing one of the ac lines through an inductive pickup l1 made with a 1 inch diameter u bolt wound with 800 turns of 30 35 mag wire metal detection design there are multiple variations of metal detector designs this particular type of metal detector is a pulse induction detector which uses separate transmit and receive coils a fuse consists of a metal strip or wire fuse element of small cross section pared to the circuit conductors mounted between a pair of electrical terminals





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