This is a test project built hastily on a solder less breadboard. It uses a LM75 to read the current temperature via I2C and displays the result on three 7 segment displays. It uses a PIC16F628 with an internal 4 Mhz clock.
The program was created using JAL
Note the LM75 is a surface mount device, so I had to solder wires onto it to use it on the solderless breadboard.
Sorry for the bad quality photo. The stuff on the left is a 5V voltage regulator and not shown on the schematic below.
Component List
Part Value Device Package Library Sheet D1 7SEG-CA 7SEG-13 special 1 D2 7SEG-CA 7SEG-13 special 1 D3 7SEG-CA 7SEG-13 special 1 IC1 PIC16F628 PIC16F628 DIL18 microchip 1 IC2 LM75 LM75 SOP-8 andre_lm75 1 Q1 BC557C BC557C TO92-EBC transistor-pnp 1 Q2 BC557C BC557C TO92-EBC transistor-pnp 1 Q3 BC557C BC557C TO92-EBC transistor-pnp 1 R1 12K R-EU_0207/7 0207/7 rcl 1 R2 12K R-EU_0207/7 0207/7 rcl 1 R3 1K R-EU_0207/7 0207/7 rcl 1 R4 1K R-EU_0207/7 0207/7 rcl 1 R5 1K R-EU_0207/7 0207/7 rcl 1 R7 220 R-EU_0207/7 0207/7 rcl 1 R8 220 R-EU_0207/7 0207/7 rcl 1 R9 220 R-EU_0207/7 0207/7 rcl 1 R10 220 R-EU_0207/7 0207/7 rcl 1 R11 220 R-EU_0207/7 0207/7 rcl 1 R12 220 R-EU_0207/7 0207/7 rcl 1 R13 220 R-EU_0207/7 0207/7 rcl 1 R14 220 R-EU_0207/7 0207/7 rcl 1
For more detail: LM75 Temperature Sensor with 7 segment display output using PIC16F628
