The self-made temporary power supply circuit

Published:2011/7/1 22:39:00 Author:Borg | Keyword: self-made, temporary power supply | From:SeekIC

1. The circuit principle The transistor V, the coils of N1 and N2 of transformer T and capacitor C compose the transformer coupling LC oscillator circuit. The potentiometer RP and resistor R provides with a bias current of the oscillator. 2. Elements selection V is adopted with 3DD59A, R is the 1/4W ordinary resistor, C is 0.22μF/50V, the transformer is self-made, N1 and N2 are the 0.9mm covered wire, the N3 coil is the 0.67mm covered wire, the coil frame can be made by the hard paper board of 1mm, the magnet would better be the ferrite of U or loop shape, if not, it can be replaced by the silicon sheet of E or F shape.



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