I am going to be using an μC with only 13 IO pins to drive peripherals requiring around 30 or so. Namely starburst / alpha numeric LED displays. It has already been suggested that some 74HC595 serial shift registers could be used to do this, but are there other ways, cheaper ways, more professional ways.
This is the LED display that I will be using:
multiplexed x 8
As you can see, there are many segments that need to be driven. I require letters as well as numbers. I also have to interface some tactile switches, a buzzer and an IR receiver, which will all be at the realm of a very cheap one-dollar μC. True that I could go with a slightly larger μC, but it works out being more expensive with the 40-pin types hovering around three-dollars. So I am hoping that I can do it all with the one-dollar MCU for two-dollars if you know what I mean. These discrete logic ICs such as the 74HC595 are bubble gum cheap at probably well under 20-cents if I buy 100 pcs or so.
What are your thoughts?
This is the LED display that I will be using:
As you can see, there are many segments that need to be driven. I require letters as well as numbers. I also have to interface some tactile switches, a buzzer and an IR receiver, which will all be at the realm of a very cheap one-dollar μC. True that I could go with a slightly larger μC, but it works out being more expensive with the 40-pin types hovering around three-dollars. So I am hoping that I can do it all with the one-dollar MCU for two-dollars if you know what I mean. These discrete logic ICs such as the 74HC595 are bubble gum cheap at probably well under 20-cents if I buy 100 pcs or so.
What are your thoughts?
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