Same PCB to suit both 0.56" and 1.0"
Design in Eagle CAD
Each PCB adressable
No surface mount
PCB size no greater than 5cm x 2.5 cm
Discussion on the possibility of using an ATTINY
I think you could do this best with an AS1108 driver on each board, these can be daisy-chained so the hardware for each module is simple with no processor required.Thanks Rob. I looked at the datasheet and I guess it's similar to the MAX7219?? Any observations from those more learned as to which chip is better?QuoteSame PCB to suit both 0.56" and 1.0" This might be tricky, probably OK but will need some research into displays to find some with pinouts that can co-exist like that.Yep, your're right. Min width for 1" is 24mm (x 4 = 100mm). There goes that one out the window....QuoteDesign in Eagle CADI'd rather chew my own arm off than use Eagle, but hey, that's just me Just had a quick learning experience with EC; I thought it was good. Any other suggestions? QuoteEach PCB adressableNot necessary in the normal sense of the word if you use chips like the AS1108, addressing is implied by the position in the daisy chain.Agreed!QuoteNo surface mountThat's easy.... ...QuotePCB size no greater than 5cm x 2.5 cmI'm pretty sure 4x 1" displays will be larger than 50mm.See above!QuoteDiscussion on the possibility of using an ATTINYSure, but what will the Tiny be doing?Seen some other tinkerers who basically simulate the MAX7219/AS1108 functions with an ATTINY. I guess it adds extensibility..._____RobLooked at you web page, and if you think you're grey mate, you could use my hair for headlights!
I suggest the MAX7219 or MAX7221Each MAX7219/7221 can drive up to 8 digits of 7-segment display. They are easy to work with (SPI, 3-wire) and daisy-chainable. They also come in 24-pin DIP packages AND there is an automotive version available (which I think might suit you better than the regular version).There is plenty of examples out there that uses the MAX7219 with Arduinos, driving either led matrices or 7-sd's
Min width for 1" is 24mm (x 4 = 100mm). There goes that one out the window....
Just had a quick learning experience with EC; I thought it was good. Any other suggestions?
if you think you're grey mate, you could use my hair for headlights!