Top header wildcard
Electronics Industry Search
Already a member? Log In
New to the site? Register
Blogs
Mechatronics Expo: A Summary of a Great Day from Design engineering at large
I am convinced there’s as many definitions of mechatronics as there are practitioners of the design philosophy underpinning this buzzword. It...


ADVERTISEMENT
  Print Friendly Version  |     Email This to a Friend  |     |  Article tools sponsored by 


Gadget Freak Case #115: Remote Telephone Indicator Lights up Ringing Cubicle

 



ADVERTISEMENT


Sponsored Content

Technology Marketplace



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

Gadget Freak Case 113

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

  Print Friendly Version  |     Email This to a Friend  |     |  Article tools sponsored by 

 
Talkback Comments on this Story

Comments entered here are posting t...... more >>
Jamison wrote: "If this hasn't bee...... more >>
The DC blocking capacitor is nonpol...... more >>
When are you filing the patent? If...... more >>
 
See all comments >>

ADVERTISEMENT
DN'S RESOURCE CENTER Get Free Information, Made Easy
| Product Brief
VIEW NOW

| Product Brief
VIEW NOW

View more View all DN resources