Problem with 74HC4067 multiplexer

Very weird problem I am investigating.

Ch0 to Ch3 - everything is fine

Ch4 to Ch11 - doesn’t function

Ch12 to Ch15 - works fine, but their values are replicated to every 4th channel backwards;

For example - Ch15 high (4095 adc) will show same value (or nearly the same) for Ch11 and Ch7.

Ch14 will show same readings for Ch10 and Ch6.

Ch13 will show same readings for Ch9 and Ch5.

Ch12 will show same readings for Ch8 and Ch4.

Help is appreciated.

Habilidades: Electronic Design, Analog Electronics, Digital Electronics, Eletrônica

Sobre o Cliente:
( 33 comentários ) Leeds, United Kingdom

ID do Projeto: #34359322

8 freelancers estão ofertando em média $24 nesse trabalho


hi, let us discuss ..........................................................................................

$30 USD in 2 dias
(30 Comentários)

Hi There, I am a senior PhD Level Expert and Have more than 5 years of experience in electronics and microcontroller, microprocessor and logic design problems. Just check my profile and share your details. Time and Bud Mais

$20 USD in 7 dias
(13 Comentários)

Hi, good afternoon, I am an Electronics Engineer, I have worked with the CD74HC4067 CMOS multiplexer in the past, I think that that the problem could be caused by phantom addresses. How are you driving the IC addresses Mais

$20 USD em 1 dia
(2 Comentários)

Hello, can you share the schematic for better understand where is the problem? Thanks

$20 USD in 7 dias
(1 Comentário)

Hello i am electronic engineer, iw ould like to help you so you can find a solution .lets discuss [login to view URL] regards.

$13 USD in 40 dias
(0 Comentários)

hi.... There seems to be a problem with your firmware. Are you choosing s0,s1,s2,s3 correctly? If they're all correct, let's look at your sketch and discuss it.* Are there any problems with the board? A/D conversion ti Mais

$20 USD em 1 dia
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So instead of bidding on your project, i will just give you some suggestions for things to look for. Some are very obvious and simple while others might be a little more non-obvious. 1. First, is this problem limited Mais

$50 USD in 7 dias
(0 Comentários)

Hello i have been working with HC Chips for many years i have got that Multiplexer i have got older Version CD4067 and that is the same i can prove you with both datasheets it is the same the CD4067 has working voltag Mais

$20 USD in 2 dias
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