I want to builld this circuit http://skemarangkaian.com/dc-fan-temperature-controlled-circuit/



can you give me the part number of this component 15k @ 20°C, N.T.C Thermistor. Thanks

 

Vishay part#: NTCLE100E3123
They're ~12k at 25°C, and ~14.77k @20°C
Digikey stocks them:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=BC2401-ND
Datasheet: http://www.vishay.com/docs/29049/ntcle100.pdf

 

By the way, I'm not very impressed with that schematic compared with their claims; I ran a simulation on it, and the transistor Q2 was dissipating too much power.

 

By the way, I'm not very impressed with that schematic compared with their claims; I ran a simulation on it, and the transistor Q2 was dissipating too much power.

can you help make it better?thanks