Emergency strobe light with 33 LEDs
33 high intensity LEDs are controlled with a AVR ATtiny2313 microcontroller. Four flashing patterns that can be set manually or cycle through. Uses an AVR ATtiny2313 microcontroller.
Details
The emergency strobe light consists of 33 high intensive 5 mm LEDs and control circuit. It has four sequences, and can be set on a single sequence or to cycle through every fifth second. When selecting a sequence manually it is stored in EEPROM and continues on power-up. If an external controlling unit is plugged in; the internal sequences will stop and the external unit is in control. This makes it possible to synchronize multiple units. LEDs are driven by a PWM output, module is powered by 9-24V.
Video
Sequences
- Flashing with fade
- 3 x strobe, pause
- Random pause strobe
- Strobe
I/O
Inputs
- PD.0 : Automatic mode change
- PD.1 : Manual mode change
- PD.2 : External controller: available
- PD.3 : External controller: pulse constant
- PD.4 : External controller: pulse fade
Outputs
- PB.0 : Mode 1
- PB.1 : Mode 2
- PB.3 : LEDs (PWM)
- PB.5 : Mode 3
- PB.6 : Mode 4
- PB.7 : External Mode
D-Sub 9-pin
- 12/13.8 V +
- 5 V +
- GND
- Trigger on/off
- Trigger fade on/off
- Trigger common +
- External controller available (N.O)
- External controller available (N.O)
Source code
Gallery
Schematic drawing
Parts list
Qty.
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Part
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1 × |
AVR ATtiny2313-20PU, DIL-20, 20 MHz, 18 I/Os
|
1 × |
Capacitor, aluminium electrolytic, 10 µF, 25V
|
2 × |
Capacitor, aluminium electrolytic, 47 µF, 25V
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1 × |
Capacitor, ceramic, 1 nF, 100V
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1 × |
D-sub soldering cups, 9 pin male
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1 × |
DIL socket, 20-pin, 7.62mm
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2 × |
DIL socket, 6-pin, 7.62mm
|
1 × |
Enclosure, plastic (1591), 120x80x59mm
|
1 × |
Fuse 5x20 mm, 1 A, fast-acting
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1 × |
Fuse holder, open, PCB, 5x20mm
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1 × |
Fuse holder, open, PCB, Protective cover
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2 × |
Heatsink, 27.3K/W, 19mm, attachable, TO220
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4 × |
LED 3mm, Red, 2.1V, 20mA, 1.0mcd, 38°
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1 × |
LED 3mm, Yellow, 2.0V, 20mA, 2.5mcd, 38°
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33 × |
LED 5mm clear, Blue, 3.4V, 20mA, 7.200mcd, 20°
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5 × |
LED holder 3mm, Black plastic
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33 × |
LED holder 5mm, Black plastic
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2 × |
Metal bracket, 15x50mm
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2 × |
Optocoupler, single, CNY17F-3, DIL-6
|
32 cm2 |
PCB, stripboard, 100x160mm, 160cm2
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1 × |
Power jack, panel, 2.1mm, plastic housing
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10 × |
Resistor, carbon film, 0.25W, 330 Ω, 5%
|
33 × |
Resistor, carbon film, 0.25W, 560 Ω, 5%
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2 × |
Resistor, carbon film, 0.25W, 4.7 kΩ, 5%
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5 × |
Resistor, carbon film, 0.25W, 10 kΩ, 5%
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3 × |
Resistor, metal film, 0.6W, 1 kΩ, 1%
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2 × |
Spacer, round unthreaded, 3mm, Ø6mm, Delrin
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10 × |
Straight pin header, female, Single row, 2.54mm
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10 × |
Straight pin header, male, Single row, 2.54mm
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1 × |
Switch, toggle, 1-pole, micro, on-off-(on)
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1 × |
Switch, toggle, 1-pole, micro, on-on
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2 × |
Terminal block, pluggable, 3.5 mm, 2-pin screw female
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2 × |
Terminal block, pluggable, 3.5 mm, 2-pin vertical male
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1 × |
Transistor, NPN, 100 mA, 45V, 0.5W, BC547B
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1 × |
Transistor, PNP, 3 A, 100V, 40W, BD242C
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1 × |
Voltage regulator +5V, 2 A, L78S05CV
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