Hi, everyone sorry I haven't written anything back as I have been unwell for sometime but all good now .
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Intensions:
I'm trying to Learn how design a complete device that will interface and power the complete circuit from RS232 port with regulated voltage of between 5 to 12V dc. I'm using 5 x Common Anode 7 segment displays with transistors ,also using standard LDR like in the pic below to control the brightness off the displays and Pot described below :eg displays should dim when day and full brightness at night , there will also be 3 x DPDT MOM OFF MOM toggle switches to increment or decrement each digits.
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Parts List:
1 x PIC16F628A for the control of most of circuit.
5 x Common Anode Displays Multiplexed and need FULL Brightness maxed out.
5 x BC557A Transistors
1 x RS232 Converter to TTL Module .
1 x On/Off /Vol /Pull to Test Potentiometer
Sorry for the mouth full guys, I hope I'm making sense. any help is appreciated