Don't forget, even though there is a limitation on sink or source there is also the fact that most never use all the LEDs at the same time !. Hence one mega CAN handle loads of LEDs - perhaps 50 or more - just not all at the same time.
So if calculate the likely maximum 'in use' at one time numbers and then you spread the load across the megas you can still probably get the maximum amount you need.
Glad to see the old Keith back and kicking. !
Go for it you old bugger - Nice one.
Joe
Don't forget, even though there is a limitation on sink or source there is also the fact that most never use all the LEDs at the same time !. Hence one mega CAN handle loads of LEDs - perhaps 50 or more - just not all at the same time.
So if calculate the likely maximum 'in use' at one time numbers and then you spread the load across the megas you can still probably get the maximum amount you need.
Glad to see the old Keith back and kicking. !
Go for it you old bugger - Nice one.
Joe
Joe,
Thank you bud.
I want to have the test function working. That means all the led's, 7seg, 14seg displays, lcd clock and other indications will be on doing their test sequence at same time. Some flash others remain static full brightness.
So unfortunately I have to manage the mA draw on each board very carefully.
Don't sweat about the 7 seg units and alpha numeric units are they are 'muxed' (multiplexed) and the power draw is therefore minimal. It is really only the single leds that really contribute to the overall power consumption bro.
Looking forward to this beast along with the small nuclear power plant to run it haha
You will be glowing green.
- Nice one.