I recently got my hands on a circuit board that contained three 7-segment displays and 595 shift registers, and I decided to order some for myself to mess around with.
The shift registers I use are the CD4015B ones and I'm trying to daisy chain them together so that I can use at least four displays, without any success so far. To make matters worse, I cannot find anything about daisy chaining these specific ICs together. Does anyone here know if it's even possible at all?
QuintenJV:
The shift registers I use are the CD4015B ones and I'm trying to daisy chain them together so that I can use at least four displays, without any success so far.
Not a lot to go on. You can speed things along by reading How to use this forum; particularly nos. 7, 8, and 9.
QuintenJV:
I cannot find anything about daisy chaining these specific ICs together. Does anyone here know if it's even possible at all?
The usual way is a common clock for all the registers and data out of one stage feeding data in of the succeeding stage.
The CD4015 shift register is an essentially obsolete device, useful only for relatively slow speed applications where you need to operate at more than 5 V - up to 15. It is not suitable for driving displays as it does not have the current driving capability and does not have the latches.
If you want to use a shift register with an Arduino, you need to use 74HC595s. These are not really suitable for driving displays either, all the more so on certain rubbish modules offered on eBay and such, missing the current limiting resistors.
You should use one of the proper display modules available on eBay based on the MAX7219 or TM1637.
The CD4015 shift register is an essentially obsolete device, useful only for relatively slow speed applications where you need to operate at more than 5 V - up to 15. It is not suitable for driving displays as it does not have the current driving capability and does not have the latches.
If you want to use a shift register with an Arduino, you need to use 74HC595s. These are not really suitable for driving displays either, all the more so on certain rubbish modules offered on eBay and such, missing the current limiting resistors.
You should use one of the proper display modules available on eBay based on the MAX7219 or TM1637.
Thank you for your advice. I will use 74CH595s since I've already seen their capabilities. And I'll get into the other displays as well if I ever plan to do something serious with them.
