MULTIPLEXING FUNCTIONALITIES IN A SINGLE CHANNEL OF A MICROCONTROLLER

A control system for use with a cordless power tool having a trigger switch includes a microcontroller having an analog I/O pin and a pin I/O driver driving the pin to high output and low output, and setting the pin to high impedance input. A temperature sensor connected to the analog I/O pin is com...

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Bibliographische Detailangaben
Hauptverfasser:	BROTTO, Daniele, CUNANAN, Regina, G.C, TRINH, Danh
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDEDFOR CONTROL OR REGULATING SYSTEMS IN GENERAL CONTROLLING DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOTPARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOTOTHERWISE PROVIDED FOR FUNCTIONAL ELEMENTS OF SUCH SYSTEMS HAND TOOLS MANIPULATORS MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS PERFORMING OPERATIONS PHYSICS PORTABLE POWER-DRIVEN TOOLS REGULATING TRANSPORTING
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Beschreibung
Zusammenfassung:	A control system for use with a cordless power tool having a trigger switch includes a microcontroller having an analog I/O pin and a pin I/O driver driving the pin to high output and low output, and setting the pin to high impedance input. A temperature sensor connected to the analog I/O pin is comprised of a voltage divider circuit and a thermistor disposed proximate to a heat source to be measured. A control module of the microcontroller measures and records temperature of the heat source by first setting the analog I/O pin high, waiting a predetermined amount of time for a capacitor of the voltage divider circuit to discharge, setting the analog I/O pin to high impedance input, taking the temperature reading, and storing the temperature reading in a computer readable medium.