Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uunet!sco!gorn!deeptht!spcecdt
From: spcecdt@deeptht.santa-cruz.ca.us (John DuBois)
Newsgroups: sci.electronics
Subject: Re: Lazer-Tag....
Keywords: remeber those???
Message-ID: <24@deeptht.UUCP>
Date: 11 Aug 90 23:10:06 GMT
References: <27113@unix.cis.pitt.edu>
Reply-To: spcecdt@deeptht.santa-cruz.ca.us (John DuBois)
Distribution: usa
Organization: The Armory
Lines: 27

In article <27113@unix.cis.pitt.edu> fmgst@unix.cis.pitt.edu (Filip Gieszczykiewicz) writes:
+
+	Greetings. I picked up about 15 of the reciever modules
+	(for $1.99 total) for Lazer Tag - a "craze" of a few years
+	back.
+
+	Now, anyone know what the "gun" consisted of and
+	possibly have any _cheap_ sources for them?
+
+	Also, what signal does a module have to recieve to
+	activate? Is it similar to a remote? (ie. carrier)

     I reverse engineered the Lazer-Tag pistol into a fairly complete
schematic.  It took me a helluvalong time and then I lost it... :-(
My goal was to up the power, which I succeeded in doing.  The gun pulses
an IR LED at about 1A; I replaced the LED with a higher power device and
added another gain stage (a nice VMOS xistor) to pulse it at 3A.  All I 
remember at this point of the signal is that the pulse was 3.2uS long. I
forget whether that was the on-time or the period, and what the duty cycle
was... sorry!  And I have a vague memory that the 3.2uS signal was modulated
with a lower-frequency signal.  Also, the signal itself lasted for some
fairly brief period of time each time the trigger was pulled.  
     There is also a Lazer-Tag rifle that was similar but autorepeated
(which was an easy mod to the pistol :-)
     Hope this is some help.

	John