imranahmed
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"Alternatively, you can still use the MAX7219 but instead of joining all the LOAD pins together, you can arrange the displays in groups with a different LOAD signal to each group."
I agree with that.the 74xx595 is NOT an LED driver, it should have additional current drivers before connecting to an LED display.
The interface is SPI so there is a Clock, Data and Enable signal, you can take the data out of one MAX7219 and in to the next. If they are all in a chain, you send the data for all the devices serially and it passes through from one IC to the next until they all have the data they need, then you raise the Enable pin to latch the data to the display drivers. The alternative is to join the Clock and Data pins along the chain but keep the Enable signals apart. In that configuration you only send the data bits for one MAX7219 at a time. All the ICs receive the same clock and data sigal but only the one with it Enable pin low will read it in, the others ignore it. It means more connections are needed and you have to add circuitry to Enable (address) one device at a time but the data transfer is quicker.Dear betwixt,
Again thank you, please more define this statement you stated in post 7.
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