จาก
http://www.extremecircuits.net/2010/01/bicycle-back-safety-light-circuit.htmlParts:
R1 = 10K
R2 = 100K
R3 = 10R
R4 = 10R
R5 = 10R
R6 = 10R
R7 = 10R
R8 = 10R
R9 = 100K
R10 = 100K
R11 = 10R
R16 = 10R
R17 = 150R
C1 = 1µF-63V
C2 = 10nF-63V
C3 = 100µF-25V
B1 = 3V Battery (2 AA 1.5V Cells in series)
SW1 = SPST Slider Switch
D1-D13 = Red LEDs 5mm. or bigger, high efficiency
IC1-IC2 = 7555 or TS555CN CMos Timer IC