3.3V <-> 5V

[Di'ego]

Hi,

I need a bidirectional level converter to convert 3.3V to 5V. It has to be
bidirectional as the signal is bidirectional. Im aware that IC's exist to
do this, but I want to do it without any IC's. Can anyone give me any
pointers on how to do this?

Thanks in advance,

 

[Robert Monsen]

"Di'ego" &lt;diego@no_spam.com&gt; wrote in message
news:bj326q$h2o$1@newsg1.svr.pol.co.uk...

Hi,

I need a bidirectional level converter to convert 3.3V to 5V. It has to
be
bidirectional as the signal is bidirectional. Im aware that IC's exist to
do this, but I want to do it without any IC's. Can anyone give me any
pointers on how to do this?

Thanks in advance,

If you use a capacitor and a couple of voltage dividers, you can pass small
signals between 3.3 and 5V. You can also do this with an optoisolation. Take
a look at the following url:

http://matthieu.benoit.free.fr/optoi2c.htm

regards
Bob Monsen