Bike Tail Light with Standlight
Be seen even at standstill!
Materials
Gerber file
CAM/CAD data for the PCB referred to in this article is available as a Gerber file. Elektor GREEN and GOLD members can exclusively download these files for free as part of their membership. Gerber files allow a PCB to be produced on an appropriate device available locally, or through an online PCB manufacturing service.
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Component list
R1 = 12Ohm
R2 = 1kOhm
R3 = 3kOhm 9
R4 = 27Ohm
R5 = 390Ohm
R6 = 150Ohm 1W
Capacitors:
C1 = 100µ F 35V radial
C2 = 22µ F 16V radial
C3 = Goldcap 1F /5.5V (Conrad Electronics # 473120)
Semiconductors:
B1 = B80C1500, round case (80V iv, 1.5A)
D1,D2 = LED, red, 3mm, Kingbright L-934SRC-J (Reichelt, LED 3-3500RT)
D3 = LED super-red, 8 mm, Kingbright L-793SRC-F (Maplin # N46AT)
D4,D5 = 1N4148
D6 = zener diode 6.2V, 500mW
T1,T2 = BC547B
Miscellaneous:
Bike rear light case, Busch & Müller type 339, www.bumm.de/docu/ruecklicht1.htm (UK distributor: Amba Marketing)
PCB, available from the PCBShop
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