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RE: Electronics Question


  • To: <ukha_d@xxxxxxx>
  • Subject: RE: Electronics Question
  • From: "Ian B" <Ian@xxxxxxx>
  • Date: Sun, 24 Feb 2002 22:19:57 -0000
  • Delivered-to: mailing list ukha_d@xxxxxxx
  • Mailing-list: list ukha_d@xxxxxxx; contact ukha_d-owner@xxxxxxx
  • Reply-to: ukha_d@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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