The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
Subject: Re: infrared simple circuit
Date: Thu, 26 Sep 2002 07:53:42 +0100
NNTP-Posting-Date: 26 Sep 2002 06:53:43 GMT
X-Newsreader: Microsoft Outlook Express 5.50.4807.1700
I think you need to modulate the signal applied to the IR LED. A frequency
of something like 38KHz with a near by capacitor for when the LED is
switched on. I remember I burnt out some LEDs by not using the right valued
resistors. You should be able to find more information on this in the
"Eitan Herman" wrote in message
> i'm trying to build infra red simple transmitter , and from a reason
> much less powerful than my TV remote, the circuit is simple 9v to the
> led... (i'm using the same infrared LED as the remote)...
> i checked the voltage on the infra-red it seems to be : 1.20v (i'm
> with 7805 but even w/o it i got the same results).
> IR LED resistance(when not connected) is 1.3M OHM.
> P.S the circuit is working but it's less powerfull than the remote.
> schematic --> 9v=7805=IRLED maximum working distance (20-25 cm).
> i have a device that can check the IR power so the reciever was the
> same for my circuit and for the remote control.
> Please Your Advice...
> (if you want to email me directly please email to
> Thanks in advance..
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup