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SU109 3.3V- 5V USB to TTL Bridge board
Product Description: SU109 is 3.3V and 5V USB bridge. It converts the USB signal into a 3.3V or 5V TTL signal and vice versa. This USB bridge is easy to connect with our RF modules, and convenience to configure the parameters of the RF modules. Users can download the USB driver from our website freely.
Shorting the different pads to make the USB bridge worked as a 3.3V or 5V interface. Put on or off the cap of setting can make the RF module enter/exit setting mode when connected with our RF modules.