|
Storbe light when phone rings
Does anyone have a schematic for once of those strobe circuits that will
flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
Keith,
I have a commercial (AT&T?) device in a sealed package that turns an outlet/lamp on when the phone rings. Don't believe it has a schematic though. Evan |
Keith,
I have a commercial (AT&T?) device in a sealed package that turns an outlet/lamp on when the phone rings. Don't believe it has a schematic though. Evan |
In article ,
"Keith" wrote: Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Buy one at Radio Shack for about $10. I got one for my very hard of hearing M-I-L who really loved it. I rigged a light next to her TV. When it flashed, she answered the phone. Her hearing aid was designed to receive signals from an inductive ear piece in the phone. Al -- There's never enough time to do it right the first time....... |
In article ,
"Keith" wrote: Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Buy one at Radio Shack for about $10. I got one for my very hard of hearing M-I-L who really loved it. I rigged a light next to her TV. When it flashed, she answered the phone. Her hearing aid was designed to receive signals from an inductive ear piece in the phone. Al -- There's never enough time to do it right the first time....... |
Radio Shack here in Canada is charging almost 50 bucks for it!!!!!
de Keith VO1AE |
Radio Shack here in Canada is charging almost 50 bucks for it!!!!!
de Keith VO1AE |
If you really want to build something (why not? this is a HomeBrew newsgroup!) there are several choices he
http://www.ee.washington.edu/circuit...Schem_Tel.html Gavin "Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
If you really want to build something (why not? this is a HomeBrew newsgroup!) there are several choices he
http://www.ee.washington.edu/circuit...Schem_Tel.html Gavin "Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
|
|
$3.95 US...You wish!! :O)
|
$3.95 US...You wish!! :O)
|
RS used to sell such an item...plugs in and strobes when the line rings...
use them a lot in broadcast use..... Chris WB5ITT at arrl.net Keith wrote: Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
RS used to sell such an item...plugs in and strobes when the line rings...
use them a lot in broadcast use..... Chris WB5ITT at arrl.net Keith wrote: Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
The easiest is a neon bulb NE-2 [don't use an NE-2H] and the largest
resistor to get it to light. Probably in the 10's to 100k. This isn't bright, but needs no power. This was used for many years in many circuits. If it is not bright enough, then one of the other circuits with a high resistance sense and external power to light a bright light is needed. That link has one http://www.ee.washington.edu/circuit...Schem_Tel.html "Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
The easiest is a neon bulb NE-2 [don't use an NE-2H] and the largest
resistor to get it to light. Probably in the 10's to 100k. This isn't bright, but needs no power. This was used for many years in many circuits. If it is not bright enough, then one of the other circuits with a high resistance sense and external power to light a bright light is needed. That link has one http://www.ee.washington.edu/circuit...Schem_Tel.html "Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. Thanks Keith |
"Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. All Electronics has boards that will do this, 5 for $1.00. http://www.allelectronics.com/cgi-bi...arch&item=EX-7 0&type=store Tom |
"Keith" wrote in message ... Does anyone have a schematic for once of those strobe circuits that will flash when the phone rings. I want to make one for my workshop where it's very noisy at times and I don't hear the phone. All Electronics has boards that will do this, 5 for $1.00. http://www.allelectronics.com/cgi-bi...arch&item=EX-7 0&type=store Tom |
| All times are GMT +1. The time now is 10:37 PM. |
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com