Electric Worm Gear Motor Right Angle Reversible 40W, 45 RPM@12V High Torque 55:1
C $53.36
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Reviews (2)
Dec 20, 2019
Handy Calculating device
1 of 1 found this helpful This is a magic black box with buttons that calculates things for you. It is extremely handy. You can store functions in it to recall when needed such as converting temperatures down Celsius to Fahrenheit or solving Ohm’s law for current or voltage.
The buttons work well and are very tactile and enjoyable to use, as opposed to the glass screens this plague of smartphones has wrought on us.
This device uses common AAA batteries that last for months if not years. The screen has good contrast but no color and no backlight—hey that’s what you get if you want good battery life!
The ergonomics are well thought out. It isn’t too big but it isn’t too small. It’s almost as if the device was designed for human hands. The buttons are big enough to be easy to push with a finger or far thumb, yet small enough to fit in the device’s compact form factor.
All in all, I wish all electronic human interfaces were designed this well. Unfortunately tactile buttons are not popular with the cool crowd.
Feb 04, 2016
Stickers. Just what you would expect.
Backside has watermark so its easy to see which side is up. Stickers peel off backing easily.