Warning strobe light controller, dual channel

From StdOut
This page is kept for historical interest. It may document projects or methods that are obsolete and/or no longer relevant. The information here is not kept up-to-date.

This module was sold, many years ago.
WALU25 with four LED warning lights.

Using this control unit one can control four LED warning lights, using two channels. The Waning Lights Unit has five programs (sequences) that can be selected manually or cycled trough. When selecting manually the selection is stored in EEPROM and automatically started on power-up. Powered by 12V, suitable for usage in cars.

Sequences:

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

I/O

Inputs

  1. PD0 Select program
  2. PD1 Run all programs

Outputs

  1. PB3 Channel 1 (PWM)
  2. PB4 Channel 2 (PWM)

LEDs

Pluggable-led-connector-g25oxg.png

Source code

Git-alt-brands.svg
Bascom-AVR source is available in a git repository:
https://github.com/thomasjsn/AVR-Warning-strobe-light-controller

Gallery

Schematic drawing

Warning-strobe-light-controller-circuit-pgoj9q.png

Parts list

Qty. Part
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
1 × Capacitor, ceramic, 1 nF, 100V
1 × Capacitor, metallized polyester foil, 10 nF, (0.01 µF)
1 × DIL socket, 20-pin, 7.62mm
1 × Enclosure, plastic (1591 FL), 120x65x40mm, flange
1 × Fuse 5x20 mm, 2 A, fast-acting
1 × Fuse holder, open, PCB, 5x20mm
2 × Heatsink, 27.3K/W, 19mm, attachable, TO220
1 × LED 5mm, Red/Green, 2.0 2.1V, 10mA, 100 63mcd, 30°
1 × LED holder 5mm, Black plastic
32 cm2 PCB, stripboard, 100x160mm, 160cm2
1 × Power jack, panel, 2.1mm, plastic housing
2 × Resistor, carbon film, 0.25W, 330 Ω, 5%
3 × Resistor, carbon film, 0.25W, 4.7 kΩ, 5%
2 × Resistor, carbon film, 0.25W, 10 kΩ, 5%
4 × Resistor, metal film, 0.6W, 1 kΩ, 1%
1 × Spacer, round unthreaded, 3mm, Ø6mm, Delrin
3 × Straight pin header, female, Dual row, 2.54mm
8 × Straight pin header, female, Single row, 2.54mm
3 × Straight pin header, male, Dual row, 2.54mm
8 × Straight pin header, male, Single row, 2.54mm
1 × Switch, toggle, 1-pole, micro, on-off-(on)
1 × Switch, toggle, 1-pole, micro, on-on
1 × Terminal block, pluggable, 3.5 mm, 2-pin screw female
5 × Terminal block, pluggable, 3.5 mm, 2-pin vertical male
2 × Transistor, NPN, 100 mA, 45V, 0.5W, BC547B
2 × Transistor, PNP, 3 A, 100V, 40W, BD242C
1 × Voltage regulator +5V, 2 A, L78S05CV