Pager motor replacement

[Ron Marcus]

I have a product that uses a flat 12 mm diameter pager motor for silent signaling. I bought them surplus by the hundred, and as happens, they have run out. It ran at 3 volts, drawing 30 mA. Does anyone have a line on a similar part? I've seen some on line, but they draw 100 mils. Since the device is battery operated, I am trying to keep the draw as low as possible.
I am surprised that there isn't some piezo counterpart that can do the same thing more efficiently without noise.

[Luciano]

Ron,

Type "pager vibrator" in Google.
(Sorry if you get also the wrong vibrators).

Example: (Pager vibrator!)
http://www.73.com/a/0185.shtml

* * *

The vibrator of a Motorola phone draws 180 mA at 3V.
(The phone uses a 3.6V battery).

Best regards,

Luciano

[Ron Marcus]

"The vibrator of a Motorola phone draws 180 mA at 3V."

I need something under 80 mA @ 3 volts.

[sayzer]

I am far away from this area but just as an idea why don't you look for tiny bobbin conductors?

You know, the ones that create magnetic field and pushes a tiny metal pin forward and pulls backward hundreds of times in a second, and thus creates a vibration.

I am sure the current is around your needs.

[Luciano]

Ron,

Check the page:
http://www.73.com/a/0185.shtml

Examples on that page:

Type 1: (38,000 AVAILABLE)
Operates on 1.3VDC@80MA. 7/8" x 3/8" x 1/4". Used in pagers, cell phones and vibrating batteries. 1-1/2" leads with mini 2 pin connector. $2.45 Ea/100, $1.95 Ea/1000. 93 in stock MC099


Type 2:
Low voltage, low current miniature vibrating motor. Operates on 1.5 - 3 VDC @ 62 mA. Tiny motor with offset weighted shaft is used in cell phones and pagers for vibrating alert signal. A removable black rubber boot surrounds the motor and provides a flat mounting surface. Without the rubber boot the motor measures 0.24" dia. x 0.5" long. The shaft and weight add an extra 0.21" to the overall length. Prepped with 0.42" long metal tabs. $1.95 Ea/100. ME235

* * *

The info about the vibrator of a Motorola phone was just to help you
when you search on the WEB. The vibrator was in a GSM phone I purchased
back in the year 2001.

* * *

Best regards,

Luciano

[Ron Marcus]

Thanks for the leads. It looks like Jameco has a good selection, but the current draw is still up there. Once again, I can't believe there isn't some other silent signalling device that is more efficient out there. If only small Piezos could be used for low frequency...

Ron