Emergency strobe light complete, showing front with all 33 LEDs mounted and wired.
Emergency strobe light complete, showing front with all 33 LEDs mounted and wired.

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.

Table of content

Operation

Sequences

  1. Flashing with fade
  2. 3 x strobe, pause
  3. Random pause strobe
  4. Strobe

I/O

Input pins

  1. PD.0 : Automatic mode change
  2. PD.1 : Manual mode change
  3. PD.2 : External controller: available
  4. PD.3 : External controller: pulse constant
  5. PD.4 : External controller: pulse fade

Output pins

  1. PB.0 : Mode 1
  2. PB.1 : Mode 2
  3. PB.3 : LEDs (PWM)
  4. PB.5 : Mode 3
  5. PB.6 : Mode 4
  6. PB.7 : External Mode

D-Sub 9-pin connector

Back of the emergency strobe, with sequence selector and indicator, power and external signal connectors.
Back of the emergency strobe, with sequence selector and indicator, power and external signal connectors.
  1. 12/13.8 V +
  2. 5 V +
  3. GND
  4. Trigger on/off
  5. Trigger fade on/off
  6. Trigger common +
  7. External controller available (N.O)
  8. External controller available (N.O)

Please leave a comment or tweet if you have any questions or feedback on this project.

Videos

Schematic drawing

Schematic drawing for the emergency strobe light module; with AVR ATtiny2313.
Schematic drawing for the emergency strobe light module; with AVR ATtiny2313.

Source code

AVR-Emergency-strobe-light

33 high intensity LEDs with four flashing patterns, written with BASCOM-AVR. Last pushed 3 weeks ago.

Master Releases


1 1 0 v1.0 Visual Basic

Image gallery

Parts list

Project: Emergency strobe light by Thomas Jensen is licensed under CC BY-SA 4.0 with attribution required.

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  •   Created Aug 06, 2007
  •   Last modified 2 months ago

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