DS18B20 Terminal Block

At the top edge of the board is a 1x3 terminal block. This block lets you connect a DS18B20 sensor to the breakout board.

• V+ - the power connection for the DS18B20
• Signal - the signal connection for the DS18B20 1-wire line
• GND - the ground connection for the DS18B20

STEMMA JST PH Ports

On either side of the breakout is a STEMMA JST PH port. These two ports allow for chaining multiple breakouts together for use with 3-pin STEMMA JST PH cables. It has connections for:

• GND - common ground for power and data. It is the black wire on the JST PH cable.
• Vin - power input for the breakout. It is the red wire on the JST PH cable. To power the board, give it the same power as the logic level of your microcontroller - e.g. for a 5V microcontroller like Arduino, use 5V.
• Sig - signal output from the DS18B20 to your microcontroller. It is the white wire on the JST PH cable.

Pullup Jumper

On the front of the board, in the center, is a jumper labeled PU. This is the Pullup Jumper for the breakout that is connected to the 4.7K signal pullup on board. You can cut the trace on this jumper to disconnect the signal pullup.

Signal LED and Jumper

• Signal LED - in the bottom left corner on the front of the board is the signal LED, labeled Sig. It is the red LED. It will blink when there is data transmission on the 1-Wire line.
• LED jumper - on the back of the board is a jumper for the signal LED. It is labeled SIG on the board silk. If you want to disable the signal LED, cut the trace on this jumper.

Power LED and Jumper

• Power LED - in the bottom right corner on the front of the board is the power LED, labeled ON. It is the green LED.
• LED jumper - on the back of the board is a jumper for the power LED. It is labeled ON on the board silk. If you want to disable the power LED, cut the trace on this jumper.