Stroboscopic PC Fan
No flash in the pan
A PC case with a side window gives plenty of opportunities for pimping the machine out with visual effects. Stand out from the crowd with the fan stroboscope circuit described here: based on an Atmel microcontroller, it drives an LED in such a way as to make the vanes of the fan seem to stop, turn slowly backwards or forwards, or suddenly change position.
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.
Elektor recommends the Elektor PCB Service service from its business partner Eurocircuits or AISLER as the best services for its own prototypes and volume production.
The use of our Gerber files is provided under a modified Creative Commons license. Creative Commons offers authors, scientists, educators and other creatives the freedom to handle their copyright in a more free way without losing their ownership.
Component list
Resistors
R1 = see text
R2 = 100kOhm
Capacitors
C1 = 100nF
C2 = 1000µF 16V
C3 = 10µF 10V
C4,C5 = 22pF
Semiconductors
D1 = BAT43
D2 = 1N4007
D3 = power LED (see text)
IC1 = ATTiny2313-20PU, programmed, Elektor # 100127-41
IC2 = 78L05
T1 = IRLU120N (International Rectifier)
Miscellaneous
K1 = 3-pin pinheader
K2 = 4- pin pinheader
JP1= 18-pin (2x9) DIL pinheader with Jumper
X1 = 20MHz quartz crystal
PCB # 100127-1
Discussion (0 comments)