engineer-in-wonderland
Rooting around in the fascinating stuff at the bottom of a draw labelled 'Engineering - Junk Miscellaneous'. Delving amongst the delightful...

Tiny vibration sensor is easy to use

 vibrationswitch.jpg
In need of a vibration sensor?

Don’t want the complexity of an accelerometer?

How about a miniature implementation of an old-fashioned rattling-bits-of-metal switch.

Fuji has a very tiny (2x2x1.2) version called CMN200.

If this is a bit too fiddly to handle, there is the 10x10mm CMN200-K
evaluation board that can take a couple of flying leads, or a similar through-hole model – MN530-02S model

I discovered this device in a comment to a bike light blog by miceuz on WeMakeThings – bought to my attention by the ever-watchful Andy C via Hackaday.

Looking at miceuz’ circuit (scroll down) and, while it is a neat idea, I balked at the use of a 10MΩ in a damp environment like an un-sealed bike light – as reduction of the resistor will shorten the time the light stays on.

So, one for those that live in deserts?

Also, it rather relies on low leakage through the tantalum.

‘Alice’

If you respond below, our spam-blocking system may throw away your comment.
Better email alice@electronicsweekly.com with ‘Vibration’ in the title.
No email addresses are collected for marketing (or any other) purposes from responses to this blog. I will keep it that way for as long as possible.

Related posts