What does LED / PT mean when defining electronics parts?
I know that LED means Light Emiting Diode but what is the PT?
these are used for TACH monitoring in a roomba.
Just wondering what PT stand for?
I know that the LED produces a signal on one side of a wheel and the PT senses the signal so as to monitor the speed of the robot. just dpnt know what PT stands for..
Light Emitting Diodes. It is a simple PN junction in a clear casing. It grows when current is passed though
May 25th, 2010 at 9:56 pm
Cindy Crawford
References :
May 25th, 2010 at 10:11 pm
Light Emitting Diodes. It is a simple PN junction in a clear casing. It grows when current is passed though
References :
May 25th, 2010 at 10:57 pm
Platinum Resistance Temperature sensors on a 1206-sized surface mount chip are now available from UK Switching & Sensing specialist, Willow Technologies Ltd. Designed, developed and manufactured by Sensotherm GmbH the sensors provide high accuracy, excellent long-term stability and a near linear output over the operating temperature range ?50 to +150C.
The sensors may be pre-aged by temperature cycling to provide a maximum long-term drift of 0.02% over the full temperature range. Available as 100 & 500 devices, the sensors are laser trimmed to standard tolerance bands with a positive temperature coefficient compliant with DIN EN 60751 specifications.
The sensors may be supplied blister-taped & reeled compatible with latest automated insertion techniques. Applications are wide and the devices make an excellent replacement for thermistors in most temperature measurement or compensation circuits.
hope this helps
References :
http://www.willow.co.uk/html/pt_sensor.html
http://en.wikipedia.org/wiki/Resistance_thermometer