Simple Magnetic stripe reader circuit using CVBC337, BD139
Magneticradtrans 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. diameter, 10cm. long ferrite rod.
Enameled wire diameter: 0.2mm.
The tap is made after 200 turns, ground side
P1 SPST Pushbutton
B1 6-9V Battery (4 to 6 AA 1.5V Cells in series, see Notes)
