LED control unit v1.0

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Mounted in the living room

LED control unit, 4 digital channels, driven by AVR ATTiny2313.

Contents

Information

A build-in voltage regulator for 5V allows a input voltage of 9 to 24V. The used is used for digital control of four channels, every channel with a dual color LED (red/green) and a push button. The LEDs show the status of the output, they lit up when a button is pushed and turns off after 10 seconds. By pushing the buttons the outputs can be toggled. The module can receive a external signal that turns off all outputs. Max load is 0.5 A (about 25 LEDs). It's possible to power anything running on 5V with this controller, like relays.

I/O

Inputs

  1. PA.0 Push button 1
  2. PA.1 Push button 2
  3. PD.0 Push button 3
  4. PD.1 Push button 4
  5. PD.2 Lights out, from LCU

Outputs

Status LED

  1. PB.0 LED 1 green
  2. PB.1 LED 1 red
  3. PB.2 LED 2 green
  4. PB.3 LED 2 red
  5. PB.4 LED 3 green
  6. PB.5 LED 3 red
  7. PB.6 LED 4 green
  8. PB.7 LED 4 red

LED light outputs

  1. PD.3 LED lighting 1
  2. PD.4 LED lighting 2
  3. PD.5 LED lighting 3
  4. PD.6 LED lighting 4

D-Sub 9-pin

  1. LED lighting 1
  2. LED lighting 2
  3. LED lighting 3
  4. LED lighting 4
  5. Lights out -12V, from LCU
  6. Lights out +12V, from LCU
  7. -5V out
  8. +5V out

Wires

  1. Yellow
  2. Green
  3. Blue
  4. Purple
  5. Red
  6. Brown
  7. White
  8. Black

Parts list

Quantity Supplier Part number Description
1 Elfa 73-646-56 AVR-RISC, ATtiny2313-20PI
1 Elfa 50-197-32 Plastic Enclosure (1591 FL), 120x65x40mm fixed install.
1 Elfa 50-194-27 Plastic Enclosure (1591), 112x62x31mm
1 Elfa 44-093-55 D-Sub plastic hood, 9-pin, black
1 Elfa 44-055-51 D-Sub soldering cups, 9 pin male
1 Elfa 44-055-02 D-Sub soldering cups, 9 pin female
1 Elfa 48-161-53 DIL socket, 20-pin, 7,62mm
1 Elfa 48-161-04 DIL socket, 6-pin, 7,62mm
1 Elfa 70-003-91 Rectifier diode, 1A 400V, 1N4004
1 Elfa 75-646-77 Heat conducting film for heatsink, Adhesive, TO220
1 Elfa 75-637-78 Heatsink 6C/W at 10 W, 37,5mm 49g
2 Elfa 48-375-06 Terminal block, PCB, screw, 5mm 2-pin
9 Elfa 48-356-90 Terminal block, screw, 2,5 mm
1 Elfa 67-008-01 Aluminium electrolytic capacitor, 10uF 25V
2 Elfa 67-008-68 Aluminium electrolytic capacitor, 47uF 25V
1 Elfa 65-851-94 Ceramic Disc Capacitor, 1 nF 100V
4 Elfa 75-007-13 LED 5mm, Red/Green, 2.0 2.1V, 10mA, 100 63mcd, 30°
4 Elfa 75-031-96 LED holder 5mm, RTC51, black plastic
3 Elfa 55-264-88 Stranded Wire, 0.22mm2, 7x0,20mm 50 V grey
3 Elfa 55-264-47 Multiple contact strip, Flat Cable, 7x0,20mm 50 V yellow
1 Elfa 55-264-21 Stranded Wire, 0.22mm2, 7x0,20mm 50 V red
1 Elfa 55-264-05 Stranded Wire, 0.22mm2, 7x0,20mm 50 V black
1 Elfa 60-722-84 Metal film resistor 1% 0,6W, 1 K
5 Elfa 60-106-15 Carbon film resistor 5% 1/4W, 10 K
13 Elfa 60-104-33 Carbon film resistor 5% 1/4W, 330 Ohm
5 Elfa 60-105-73 Carbon film resistor 5% 1/4W, 4,7 K
1 Elfa 75-355-94 Optocoupler DIL-6, CNY17F-3
13 Elfa 43-708-05 Socket connector 2,54, 1×36, female
13 Elfa 43-702-19 Straight pin header 2,54, 1×36, PCB
1 Elfa 33-167-26 Fuse 5x20 mm, 500 mA, quick-acting
1 Elfa 33-150-17 Open fuse holder, PCB, 5x20mm
1 Elfa 33-150-25 Open fuse holder, PCB, Protective cover
4 Elfa 48-858-02 Skrew, wood, recessed, 3x12mm, +
1 AUX-01 Voltage regulator +5V, 1.0A
1 Elfa 42-051-18 Power Jack, panel, 2,1mm
4 Elfa 71-049-87 Transistor BC337-25, NPN, 45V 0.5A 0.8W
4 Elfa 35-084-39 Push-button Switch, 1-pole, 1A, 50VAC, on-(off)

Images

Box complete inside

Box complete inside

Box with heat-sink

PCB complete

PCB complete

Box complete inside

Box complete with PCB

Box complete

Mounted in the living room

Relay box for lamp

Connection

Mounted in the living room

Connector 5V for LEDs

Schematic drawing

Led styringsenhet 10 circuit.png

Resources

Source code

The program is written in basic, using Bascom-AVR. 

'--------------------------------------------------------------
'                         Thomas Jensen
'--------------------------------------------------------------
'  file: AVR_LED_CONTROL_DIGITAL_4CH_v.1.0
'  date: 17/02/2007
'--------------------------------------------------------------
$regfile = "attiny2313.dat"
$crystal = 8000000
Config Watchdog = 1024
Config Portb = Output
Config Porta.0 = Input
Config Porta.1 = Input
Config Portd.0 = Input
Config Portd.1 = Input
Config Portd.2 = Input
Config Portd.3 = Output
Config Portd.4 = Output
Config Portd.5 = Output
Config Portd.6 = Output
 
Dim A As Byte , Ledtimer As Integer
Dim Bryter1 As Bit , Bryter2 As Bit , Bryter3 As Bit , Bryter4 As Bit
 
Ledtimer = 100
Bryter1 = 0
Bryter2 = 0
Bryter3 = 0
Bryter4 = 0
 
Portb = 0
Portd.3 = 0
Portd.4 = 0
Portd.5 = 0
Portd.6 = 0
 
'Boot sequence
For A = 0 To 7
    Portb.a = Not Portb.a                                   'all LEDs on
    Waitms 250
Next A
 
For A = 0 To 7
    Portb.a = Not Portb.a                                   'all LEDs off
    Waitms 250
Next A
 
Waitms 1000
 
Start Watchdog
 
Main:                                                       'start loop
'Change status
If Pina.0 = 1 And Bryter1 = 0 Then                          'push button 1
   Bryter1 = 1
   Portd.3 = Not Portd.3
   Ledtimer = 100
   End If
If Pina.1 = 1 And Bryter2 = 0 Then                          'push button 2
   Bryter2 = 1
   Portd.4 = Not Portd.4
   Ledtimer = 100
   End If
If Pind.0 = 1 And Bryter3 = 0 Then                          'push button 3
   Bryter3 = 1
   Portd.5 = Not Portd.5
   Ledtimer = 100
   End If
If Pind.1 = 1 And Bryter4 = 0 Then                          'push button 4
   Bryter4 = 1
   Portd.6 = Not Portd.6
   Ledtimer = 100
   End If
 
'Reset button timers
If Pina.0 = 0 Then Bryter1 = 0                              'push button 1
If Pina.1 = 0 Then Bryter2 = 0                              'push button 2
If Pind.0 = 0 Then Bryter3 = 0                              'push button 3
If Pind.1 = 0 Then Bryter4 = 0                              'push button 4
 
'LEDs
If Ledtimer > 0 Then
   Decr Ledtimer
   Portb.0 = Portd.3                                        'ch 1 LED green
   Portb.1 = Not Portd.3                                    'ch 1 LED red
   Portb.2 = Portd.4                                        'ch 2 LED green
   Portb.3 = Not Portd.4                                    'ch 2 LED red
   Portb.4 = Portd.5                                        'ch 3 LED green
   Portb.5 = Not Portd.5                                    'ch 3 LED red
   Portb.6 = Portd.6                                        'ch 4 LED green
   Portb.7 = Not Portd.6                                    'ch 4 LED red
   End If
If Ledtimer = 0 Then
   Portb = 0                                                'all LEDs off
   End If
 
'Lights out
If Pind.2 = 0 Then
   Ledtimer = 100
   Portd.3 = 0
   Portd.4 = 0
   Portd.5 = 0
   Portd.6 = 0
   End If
 
Reset Watchdog
Waitms 100
Goto Main                                                   'restart loop
End
Retrieved from "http://uctrl.net/w/LED_control_unit_v1.0"
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