Name Board LEDs using relays

128

01:37:56

Out put getting from.. IC4017 and 555timer.. Clock signal.  In the name board 3 shares, 
FirstName, 2ndName, Phone #.

Btn 1. Out1 =ic4017 Q1.1stName ON for 1sec. 
Then Off for 1sec, Q2 is empty. 

Btb2. Out2 = ic4017 Q3, 2ndName ON for 1sec. 
Then Off for 1sec, Q4 is empty. 

Btn3. Out3 = ic4017 Q5...phone #
Then Off. ...

Btn4, out 4 = ic4017 Q7,Q8,Q9.all leds groups...FirstName, 2ndName, Phone # ON for 3 sec. 
.. 

MY QUESTION :
How to manage voltage ?  any led group can be 100 to 500+ leds.? 

published 4 years ago

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