PIC DS1820 Thermometer
Tuesday, August 11th, 2009
This application shows how to use the PIC16F877 to control, and interface with the Dallas DS1820 1-Wire Digital Thermometer. [...] Link
PIC DS1820 Thermometer
Temperature controlled Fan 12V dc
Tuesday, August 4th, 2009
Suitable for computer cooling fans
LED motor speed indicator
Requested by some correspondents, this simple design allows an accurate speed control of 12V dc fan motors, proportional to temperature.
A n.t.c. Thermistor (R1) is used as temperature sensor, driving two directly coupled complementary transistors wired in a dc feedback circuit.
An optional circuitry was added to remotely monitor fan [...]
Temperature-controlled 12V dc Fan
Wednesday, December 3rd, 2008
Suitable for computer cooling fans
LED motor speed indicator
The required number of reporters, this simple design can accurately control the speed of the 12V DC motor fans, is directly proportional to the temperature.
Ntc the Arab-Israeli re-thermal (r1) as a temperature sensor, direct drive coupling of the two complementary transistors wired in the DC feedback circuit.
An optional [...]
