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jw0752

Power Straw

Posted by jw0752 Top Member Oct 31, 2016
For several years my Mom has been in a Nursing Home with Parkinson's disease. As she has lost function of her muscles I have attempted to use technology to assist her. I have posted a couple of my attempts to assist her in my Blog on E-14.   https://www.element14.com/community/people/jw0752/blog/2015/07/07/hacking-a-lift-chair   https://www.element14.com/community/people/jw0752/blog/2016/01/15/building-an-led-amplifier-for-mom   Recently on her bad days she has been too weak to ...
Tonight I am experimenting with an LTC 6992 Voltage Controlled PWM IC. I had an application where I wanted to control a motor's speed using a variable voltage and the LTC6992 came up in my search. Here is the chip as listed on the Newark site:   http://www.newark.com/linear-technology/ltc6992cs6-1-trmpbf/timerblox-single-1mhz-5-5v-6-tsot/dp/24T2694   And here is the link to the Data Sheet from Linear Technology.   http://www.farnell.com/datasheets/1642034.pdf?_ga=1.70056336.141 ...
While digging through my stores of old and obsolete parts I came across this 3.5 X 2.5 X 1.25 cm black box with 4 leads and no markings.     I can remember it being in my stock of parts back in the late 1960s and early 1970s when I was repairing equipment for the Radio Shack but I can not place the piece of equipment that it was used in. I also was not sure exactly what it was. With only 4 leads the puzzle seemed solvable.   An Ohmmeter check of the leads showed that there is ...