The software ArcheryClock (www.archeryclock.com) by Henk Jegers is used for controlling archery competitions. The software can use computer screens to show who is supposed to shoot when. It can also send signals to external hardware for traffic lights, buzzer and other indications.
This project is an LED-screen controller that can interpret the signals from ArcheryCklock software and light up the appropriate LED:s on the screen. You need to add an Arduino Mega 2560 Rev3 to the controller board and also an XBee module for communication. The Arduino software provided at www.archerclock.com is not capable of controlling all features that this project can control. To use all features you need the Arduino software provided here.
An example of LED screen hardware is also provided here.
The fan is controlled by the Arduino software. The board have a temperature sensor connected to the Arduino port A7 and controls the fan by port 13. Port 13 have PWM so it is possible to control the fan speed if a fan that supports that is used. The cheapest fans usually don’t support speed control by PWM. The Arduino software provided do not use the PWM ability.
If you do not put the controller in a case you should not be needing a fan. Most of the heat is radiating from the Arduino on board voltage regulator. That's a known problem when you feed it 12V as VIN. To lower the problem I added a pre voltage regulator so we only feed the Arduino 9V as VIN.
- All outputs can draw maximum 300mA. If more current is needed go via a relay.
- All outputs connects to ground when on.
The Terminal blocks:
The WAGO terminal blocks is of Cage Clamp type. This type is good when the temperature shifts as it can adjust itself for the expansion and shrinking of metal.
The WAGO terminal blocks is a bit expensive but can be replaced by simpler ones.
The pin spacing for WAGO 233 series is 2.54 mm (0.1 inch) and for the 255 series is 5.08 mm (0.2 inch)