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.
From: - René -
Subject: Re: Light gun circuit
Date: Mon, 13 Jan 2003 16:45:14 +0100
References: <firstname.lastname@example.org> <email@example.com>
X-Newsreader: Forte Agent 1.93/32.576 English (American)
NNTP-Posting-Date: 13 Jan 2003 16:45:14 CET
On 13 Jan 2003 07:31:23 -0800, LouisCimon@sympatico.ca (Louis Cimon)
> wrote in message news:...
>> Louis Cimon wrote:
>> > Hi,
>> > I am looking for a circuit to build a target game. What I would like
>> > to do is do is project a target on a wall (5 to 20 feet, room with
>> > normal interior lighting). The gun should be able to detect the
>> > target.
>> > Ideally I would like to have 3 to 5 different simultaneous targets
>> > that the gun could recognize individually.
>> > I have seen a commercial target game that used a slide projector to
>> > project targets. I dont know how it worked but the gun was capable of
>> > detecting a very small specific part of the target.
>> Detecting colours in the target, bright patches, detecting flicker or
>> a beam scanned across the target areas, or even going the whole
>> hog, and sticking a video camera with microprocessor in there to do target
>> What's the budget, and do you want to make one or many?
>I intend to build a few (less than 5) and I have a low budget (less
>than 100$ per unit lower; cheaper be better).
>I was thinking to use a circuit built on a photo transistor (with a
>lens), an op-amp and a 567 tone decoder for detection and a 555 driven
>LED projected on a wall(using a lens)as target. This type of circuit
>is used (in reverse) by "laser tag" games. They use infrared and
>pretty good range (more than I need). Is this scheme workable?
>The other option that I was thinking about is based on color detection
>but I never saw circuits for this.
Better puls an IR led with ~ 38 KHz (led + collimator lens) , use a
stock standard integrated IR decoder for pickup (+ lens or pipe for
directivity) For multiple targets, perhaps use data protocol as used
in RC's (RC5?)
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup