MAX232 issue...

[Adam Bradley]

Having an issue configuring a MAX232 chip (I know - there's not much to it!)
I'm using a 7.5V 1A DC plugpack regulated by a 78l05 -
http://members.optushome.com.au/adambradley/electronics/MAX232/78l05-5V 1A
%20source.JPG

Chip is configured as per datasheet
http://members.optushome.com.au/adambradley/electronics/MAX232/MAX232 data
sheet.jpg

on a breadboard
http://members.optushome.com.au/adambradley/electronics/MAX232/MAX232 -
breadboard.jpg

Pin 2 reads +4.71V (I believe this should be +10V)
http://members.optushome.com.au/adambradley/electronics/MAX232/MAX232 -
pin%202%20(should%20be%20+10V).jpg

Pin 6 reads 1.32V...
http://members.optushome.com.au/adambradley/electronics/MAX232/MAX232 -
pin%206%20(should%20be%20-10V).jpg

down to 0.73V after a couple of seconds
http://members.optushome.com.au/adambradley/electronics/MAX232/MAX232 -
pin%206%20after%203%20seconds.jpg

Any ideas?
Thanks in advance!
Adam

 

[Adam Bradley]

Pin 15 - Ground - fixed!