Bar-mode LED-cluster sequencer Can drive up to 16 clusters
This circuit, designed on request, allows up to 16 LED clusters illuminate in bar-mode sequence. LED sequencing will start when the Brake pedal is pressed (or Turn Lights are switched-on) and, when the last cluster illuminates, all LED clusters will remain steady on until the Brake pedal is released or Turn Lights are switched-off.
Parts:
R1,R5____________1K 1/4W Resistors
R2______________33K 1/4W Resistor
R3_____________100K 1/2W Trimmer Cermet
R4_______________1M 1/4W Resistor
R6,R7,R8________10K 1/4W Resistors
R9_______________4K7 1/4W Resistor
R10_____________33R 1/4W Resistor (See Notes)
[...]
D1______________LED (Any dimension, shape or color)
D2,D3________1N4002 100V 1A Diodes
D4–D15________LEDs High brightness, high efficiency red types (See Notes)
Q1___________2N3819 General-purpose N-Channel FET
Q2____________BC337 45V 800mA NPN Transistor
Q3____________BC547 45V 100mA NPN Transistor
IC1____________7555 or TS555CN CMos Timer IC
IC2,IC3________4094 8-stage shift-and-store bus register IC
SW1____________SPST Brake/Turn Lights Switch
Please read more at the original source :http://www.redcircuits.com//Page105.htm
Thank you.
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This entry was posted on Monday, September 10th, 2007 at 10:32 pm and is filed under Automotive, LED Flasher, Lighting.
