IR receiver resistance

[Colin F. <tr...@ih...>]

Hi,
 
I'm trying to put together a basic serial reciever, but I'm having some
voltage problems. The IR module (Sharp IS1U621) doesn't seem to be getting
enough voltage when connected.
When it's not connected - I get 10.5V before the regulator - and 5V after
When the IR module is connected - I get 6.5V before the regulator - and 4.3V
after - This is not enough to power the module!
I'm not really eletronics savy enough to work out why this is - and what I
need to do to fix it. Help?
 
Regards
Colin