gamelektro Posted April 15, 2007 Report Share Posted April 15, 2007 i made the project DS1621 pc thermometer From electronics-lab.comhttp://www.electronics-lab.com/proje...010/index.html or From http://www.riccibitti.com/pc_therm.htmi'm a newbie for electronics so There is something i want to ask?1. about voltage limiters (R1, DZ2, R2, DZ1) on the SCL clock input and SDA data input. how to look for the value for resistor and dioda zener for that project, i mean 4700 ohm and 5 volt dioda zener, what formula used in searching the value for that resistor and dioda zener. ? how to count it ? until we get the value for resistor and dioda zener?. i'm having trouble to read the data sheet because to many symbol that i don't understand.2.i'm learning the source code, but there is something i don't understand.temperature = (temperature_int * 256 + temperature_frac) / 128 * 5 / 10If temperature_int >= 128 Thentemperature = temperature - 256i don't understand about the code, does anyone can help me to explain this code and explain the formula code? Please help. i'm sorry about the english sentencei'm doing my best to write it. Thank YouPlease Help me explain this project!!!! Quote Link to comment Share on other sites More sharing options...
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