RE: Electronics Question

["Ian B" <Ian@xxxxxxx>]

or for a one off the 233 which doesn't need caps at all. As mentioned before before you may want to put it through a NOT gate chip. About 30p from memory.

 

Ian

-----Original Message-----
From: Dave McLaughlin [mailto:dave@xxxxxxx]
Sent: 24 February 2002 10:51
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Electronics Question

Have a look at the MAX202 as it can use simpler polyester type caps.

 

Dave...

 

-----Original Message-----
From: Keith Doxey [mailto:lists.diyha@xxxxxxx]
Sent: 24 February 2002 09:23
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Electronics Question

The MAX232 I posted to the list yesterday includes voltage doublers and converters all in a single 16pin DIP.

 

In fact I was building a test board last night with a MAX232 and PIC 16F628.

 

Keith

-----Original Message-----
From: Dr John Tankard [mailto:john@xxxxxxx]
Sent: 24 February 2002 06:50
To: ukha_d@xxxxxxxSubject: RE: [ukha_d] Electronics Question

> Hi,
>
> I'd like to take a data signal clocked at 1200 Baud, from a battery
> powered deivce (power is 3x1.5V AAA) for connection to a
> serial input at
> either 5V or RS232 levels, any suggestions on the best way to do this.
>
> Note I only need to read the data.

I assume the question you are asking is how do I get the required
voltage to run rs232 ? If that is what you want then you could look at a
DC-DC converter, mamim do them from memory
http://dbserv.maxim-ic.com/PowerSupplies.cfm

Or if you don't heed a higher voltage for any other parts of you design
you could look at a rs232 driver with voltage conversion built in. Again
Maxim do loads of theses but I can't remember the part numbers, take a
look on the same site under interface.

John





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