help Pic16F628a connection

brian25 · Jan 31, 2014

i'm using this bluetooth shield, how's the connection between this and PIC16F628A stand alone microcontroller?

can i connect directly the RX/TX of bt shield and PIC16F628A or do i need to put resistor between them?

http://www.e-gizmo.com/KIT/BLUETOOTH%20SHIELD.html

thanks

betwixt · Jan 31, 2014

There is no specification for that particular device but I would guess it runs off 3.3V maximum supply. If you can run the PIC from 3.3V there should be no problem with a direct connection. If the PIC is running from 5V, connect the output of the bluetooth module directly to the input of the PIC and connect the output of the PIC through a potential divider to the module. You should be able to make the divider from a 1K resistor in series with the signal and 1.5K to ground across the input to the module. That will drop the PIC 5V levels down to about 3.3V.

Brian.

brian25 · Feb 4, 2014

thanks Bet f628A runs in 3.3V :grin:

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