自行车回安全光栅电路-Bicycle back Safety Light

Flashing 13 LED unit, 3V supply

Also suitable for jogger/walkers

Parts:

R1_____________10K   1/4W Resistor
R2,R9,R10_____100K   1/4W Resistors
R3-R8,R11-R16__10R   1/4W Resistors
R17___________150R   1/4W Resistor

C1______________1΅F  63V Polyester Capacitor
C2_____________10nF  63V Polyester Capacitor
C3____________100΅F  25V Electrolytic Capacitor

D1-D13_____Red LEDs  5mm. or bigger, high efficiency

IC1,IC2________7555  or TS555CN CMos Timer IC

SW1____________SPST  Slider Switch

B1_______________3V  Battery (2 AA 1.5V Cells in series)

Device purpose:

This circuit has been designed to provide a clearly visible light, formed by 13 high efficiency flashing LEDs arranged in a pseudo-rotating order. Due to low voltage, low drain battery operation and small size, the device is suitable for mounting border=0>

Notes:

Flashing frequency can be varied changing C1 value.

High efficiency LEDs are essential.