Text only | Text with Images

Dangerous Prototypes

In development => Project logs => Topic started by: asgard on June 02, 2015, 06:23:54 pm

Title: Thermal PWM Fan calculation
Post by: asgard on June 02, 2015, 06:23:54 pm
Here is an Excel spreadsheet which I have used to design a PWM Fan temp sensor connected to an
Arduino ADC pin.  With this I can play around and get the right factor and base numbers for setting
the DAC output to the PWM fan (a 12V mini muffin fan).

I have the sensor approximating ambient temperature in the TFT, but since this is not a high-accuracy
requirement (just intended to keep the circuitry from melting off :) the approximation is sufficient.

The URL to the Epcos online calculator for getting the curve data is included as well as a typical circuit.
[attachment=0]
Text only | Text with Images

( ! ) Fatal error: Uncaught exception 'Elk_Exception' with message 'Please try again. If you come back to this error screen, report the error to an administrator.' in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
( ! ) Elk_Exception: Please try again. If you come back to this error screen, report the error to an administrator. in /var/www/dangerousprototypes/forum/sources/database/Db-mysql.class.php on line 696
Call Stack
#TimeMemoryFunctionLocation
10.00852033680session_write_close ( )...(null):0
20.00882165256ElkArte\sources\subs\SessionHandler\DatabaseHandler->write( )...(null):0
30.00882166032Database_MySQL->query( ).../DatabaseHandler.php:119
40.05212304752Database_MySQL->error( ).../Db-mysql.class.php:273