Gadget Freak Case #115: Remote Telephone Indicator Lights up Ringing Cubicle
By Design News Staff -- Design News, February 3, 2008
You leave your cubicle to get a cup of coffee. You get a few feet and hear a phone ring. Is it yours? You dash back and nope, not yours. You head back for the coffee and hear a phone ring again...
Alan Vogel has a gadget that solves that aggravating problem. His Remote Telephone Indicator turns on a light above the cubicle when your phone is the one ringing. The gadget is relatively simple. You don't have to open the phone and add wires. It senses when your phone is ringing and sends a signal to the light posted high above your cubicle. Even from a distance, you can see that your cubicle’s phone is the one that’s ringing.
Get the Build Instructions | View Parts List | Post a Comment
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| Amt | Part Description | |
| 1 | Wall XFMR 9V dc, 200 mA | 928-9892 |
| 1 | J1 2.1 mm Power Jack | 932-9425 |
| 1 | CDS1 Photocell | 699-6051 |
| 1 | R1 750 Ω, 1/4W Resistor | 832-0869 |
| 1 | R2 330 Ω, 1/4W Resistor | 832-0018 |
| 1 | R3 10K Ω, 12-Turn Pot | 754-2232 |
| 1 | Q1 VN2222L N-FET Transistor | 568-0414 |
| 1 | D1 1206 SMT Red LED | 679-0260 |
| Get Build Instructions | ||
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Comments entered here are posting to the 'phone ringing indicator' project instead of to the...
- 2008-7-4 08:18:57 EDT -
Jamison wrote:"If this hasn't been patented before, you should seriously consider writing...
- 2008-7-4 08:06:47 EDT -
The DC blocking capacitor is nonpolar because the phone line's ringing voltage which can be as...
- 2008-7-4 08:03:04 EDT -
When are you filing the patent? If this hasn't been patented before, you should seriously...
- 2008-2-4 05:29:32 EDT -
This is cool, easy, and applicable. I did not know pulse dialing was still avaiable. I have...
- 2008-19-3 06:37:30 EDT
























