Thursday, February 28, 2013

This simple charger uses a single transistor as a constant current source. The voltage across the pair of 1N4148 diodes biases the base of the BD140 medium power transistor. The base-emitter voltage of the transistor and the forward voltage drop across the diodes are relatively stable. The charging current is approximately 15mA or 45mA with the switch closed. This suits...
Vertical IC PIN-OUT DATAAN5521 Vin = 4, Vout = 2, Vcc = 7, Gnd = 1, VfB =AN5522 Vin = 7, Vout = 5, Vcc = 2, Gnd = 4, VfB = 1AN5539 Vin = 4, Vout = 2, Vcc = 6, Gnd = 1, VfB = 5AN15525 Vin = 7, Vout = 5, Vcc = 2, Gnd = 4, VfB = 1LA7832 Vin = 4, Vout +2, Vcc = 6, Gnd = 1, VfB = 5LA7835 = 2 Vin, Vout = 11, Vcc1 = 1, Vcc2 = 7,LA7837 = 2 Vin, Vout = 12, Vcc1 = 1, Vcc2 = 8, Gnd...
This DIY 12V to 220V voltage converter is build with CMOS 4047 that is the main component of this small voltage converter that transforms a 12V DC into 220V AC. 4047 is used as a astable mutivibrator, at pins 10 and 11 will have a symmetrical rectangular signal wich is amplified b 2 Darlington transistors and finally reach the secondary coil of mains transformer ( 2x10V...

Wednesday, February 27, 2013

Dioda ialah jenis vacuum tube yang memiliki dua buah elektroda. Dioda termasuk komponen elektronika yang terbuat dari bahan semikonduktor. Beranjak dari penemuan dioda, para ahli menemukan juga komponen turunan lainnya yang unik. Dioda memiliki fungsi yang unik yaitu hanya dapat mengalirkan arus satu arah saja. Struktur dioda tidak lain adalah sambungan semikonduktor...
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