How to build master slave clocks with pic micro

[koolguy]

Hello,
I just found nice project on Gps clocks
https://www.sparkfun.com/tutorials/47

 

[koolguy]

Hello again,
How to communicate the slave clock master will have Ds1703 RTC in it, for communication which is best ?

 

[koolguy]

hello,
in case of wireless it will costly for customers..so, any other communication for less wires and more length..

 

[Ian Rogers]

For distance, use RS485..... Its nearly the same as RS232, but designed for greater distance... It is a bit more robust!!

 

[koolguy]

One thing more i am using LM35 with PIC16F72 i want to connect 7 segment Display the range i want is 0 to 99 on 2 digit!
5V is working and reff. value for uC also ADC.
5V/255=19mV per bit,right?
and 10 mV mean 10*C...

 

[Ian Rogers]

I wrote some software for that somewhere!! I'll dig it out for you!

 

[koolguy]

hello,
the 8 bit ADC micro will do 255 steps of 5V which mean 19.0mV as, 5/255=19mV so, how to convert in *C...?

 

[koolguy]

I wrote some software for that somewhere!! I'll dig it out for you!

Hello,
is LM 35 is fine for Temperature sensor can we use other like DS18B20, which is reliable?

 

[Ian Rogers]

Hello,
is LM 35 is fine for Temperature sensor can we use other like DS18B20, which is reliable?

One Wire is a bit of a learning curve.... I have written a library for that as well... Got to find it though...

I wrote these ages ago and will be on a computer somewhere!!

 

[koolguy]

Hello ,
For scrolling display for getting bold font without changing the font look up table can we make 5x7 font 1 pixel of 4 leds to get more high light??
i got STP16CP05 which say Vout 20max bout V supply is 7 max i am confused with it ?