Hi, somebody know a 7 segment decoder let it A B C D E F as well because i have one but after the 9 the output are simbols.

 

hi Sergio,
Which type of decoder are you using.?
E

 

I'm not aware of any that are in production. One that you might be able to find in surplus is the MC14495. But beware of counterfeit parts.

 

You can create your own decoder with any 14 or 16-pin Atmel AVR, TI MSP430, PIC MCU.

 

7 segment decoder let it A B C D E F as well

I built my own with a matrix of diodes - a bit laborious but it worked fine. Seven columns A to G for the segments, 16 rows, where for each row the relevant columns are connected by diodes. B and D are sadly lower case (mabe even C) and rather bulky, but it works. Strip boards placed at right angles with diodes sandwiched between. Special care to get it right as it's impossible to correct once soldered!

 

somebody know a 7 segment decoder let it A B C D E F

MC14495 used a PROM to implement the decoder. You could implement most of the functionality with a 32x8 PROM.

 

As MrChips said, I used ATmega328 and ATtiny85 chips to write my own decoding and multiplexing schemes for various displays.

If you are looking for a challenge, try designing your own UART / I2C type bus from scratch.

 

MC14495 used a PROM to implement the decoder. You could implement most of the functionality with a 32x8 PROM.

And with 32 words, you can store both a CC and a CA map for convenience.