Bluetooth supply voltage

Status
Not open for further replies.
A

amitaiwe

Member level 3
Joined
Feb 19, 2014
Messages
57
Helped
0
Reputation
0
Reaction score
0
Trophy points
6
Visit site
Activity points
547
Hi,
I'm trying to wire up a BT module RN42SM.
I have a battery of 9V and the recommended vin is 3.3v.
I tried using a Voltage divider and it turned out that the BT has a very
high resistance and for various values of resistor the voltage input to
the BT was epx. 1.5V.
only when I connected directly the 9V the BT turned on (led)
and became hot very quickly..
Is there a way of using the battery to connect to the BT without
ruining it? do I need to use some digital supply instead?

Thanks, Amitai
 

Hello!

If you connected your BT module directly to 9V, it's probably dead.
What you need is a voltage regulator. If you want to save energy, don't use a linear,
but a switching (buck) converter. If you use a linear converter, you will loose 2/3 of
the battery power.

Dora.
 
Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…