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Archives for August, 2012

Audio Amplifier Circuit Design STK439

Audio Amplifier Circuit Design STK439

60W Audio Amplifier Circuit STK4392

60W Audio Amplifier Circuit STK4392 Class G/H headphone amplifiers. No compromise to power/performance on Sanyo Amplifiers ISO 9001 certified, full warranty

40 – 0 – 40 5A transformer Circuit diagram

40 – 0 – 40 5A transformer Circuit diagram The power supply should be capable of supplying the maximum current required with good stabilization. I used commercially available 40 – 0 – 40 5A transformer. The transformer have 6V, 9V, 12V and 22V windings also. The transformer cost me around Rs: 370. Power supply provides […]

Reader circuit

Simple Magnetic stripe reader circuit using CVBC337, BD139 Simple Magnetic stripe reader circuit using CVBC337, BD139 R1 68K 1/4W Resistor C1 4n7 630V Ceramic or Polyester Capacitor C2 60-80pF 63V Ceramic Trimmer C3 100F 25V Electrolytic Capacitor Q1 BC337 45V 800mA NPN Transistor Q2 BD139 80V 1.5A NPN Transistor L1 500 turns on a 10mm. […]

400 watts full power transistor audio amplifier circuit

400 watts full power transistor audio amplifier circuit 400 watts power transistor audio amplifier circuit using TR 7199P, 6L6GC, 6SN7 Parts: R1 10 kΩ         C1 0.22 µF      Q1 7199 P R2 100 kΩ       C2 0.2 µF        Q2 6L6GC R3 220 kΩ       C3 0.5 µF        Q3 6L6GC R4 820 kΩ […]

Relay Driver circuit using Light Dependent Resistor

Relay Driver circuit using NE5534, LDR – Light Dependent Resistor

Audio preamplifier with tone control

Audio preamplifier with tone control using TDA1524A

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