6v led strobe circuit using CD74HC4017 and MM74C14

6v led strobe circuit using CD74HC4017 and MM74C14

Led Strobe
1 IC1 MC14584BCP
IC2 CD74HC4017N
T1 2N3904 or 2N4401 NPN transistor
8 D1 to D8 1N4148 or 1N914 Diodes
10 LEDs Blue, green or white Ultra-Bright LEDs

with Vf = 3.2V or less at 20mA
1 R1 100K 1/4W resistor
1 R2 1M Linear-taper potentiometer
1 R3 33K 1/4W resistor
1 R4 2.2M 1/4W resistor
1 R5 22M 1/4W resistor
1 R6 47K 1/4W resistor
1 R7 1M Audio-taper (logarithmic) potentiometer
1 R8 1.8K 1/4W resistor
1 R9 68 ohms 1/4W resistor

1 C1 100uF/16V Electrolytic capacitor
1 C2 0.1uF/50V Ceramic capacitor
2 C3 and C4 1uF/63V Metalized poly capacitor
1 C5 470nF Metalized poly capacitor
2 C6 and C7 1nF Metalized poly capacitor

A CD74C14 can also be used for IC1 but R4 = 1M,

R5 = 10M, C3 and C5 = 330nF, C4 = 470nF.
6v Led Strobe circuit using CD74HC4017 and MM74C14