gamelektro Posted March 31, 2007 Report Share Posted March 31, 2007 i made the project DS1621 pc thermometerhttp://www.electronics-lab.com/projects/pc/010/index.htmlThere 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?.2.i'm learning the source code, but there is something i don't understand.temperature = (temperature_int * 256 + temperature_frac) / 128 * 5 / 10 If temperature_int >= 128 Then temperature = 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 You Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.