Thermometer using an arduino, a 7 segment display and a DS18B20 sensor

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Simple DYI project using an arduino, a 7 segment display and a DS18B20 sensor.

The 7 segment display is mulitplexed using the arduino, thus we get some flickering.
To avoid overloading the arduino, sinking all current through one pin, 4 pnp transistors were used.

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Is there a schematic available for this build?

lawrencehallman