Re: TI-H: new schematic

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: new schematic
From: Gregory Whitmore <gfw9941@usl.edu>
Date: Thu, 23 Oct 1997 22:45:07 +0000
Organization: University of Southwestern Louisiana
References: <01BCDFE8.44AFA620@dial184.bway.net>
Reply-To: ti-hardware@lists.ticalc.org

You can use a lower power supply, but the range will SUCK! I am currently working on a high output version, that in theory will work at about 75-100m and still only use a 9v battery.

Christopher Kalos wrote:

> Granted the range is good, but shouldn't low-power consumption come first.  We can always humiliate the HP pack later with a 150ft IR transmission assembly.
>
> ----------
> From:   Gregory Whitmore[SMTP:gfw9941@usl.edu]
> Sent:   Thursday, October 23, 1997 1:28 PM
> To:     ti-hardware@lists.ticalc.org
> Subject:        Re: TI-H: new schematic
>
> The size of the links depend on the builder, my prototype was large to make for mods. You could put it in a small enough box to hold the parts, a PCboard isn't really necessary. I really designed this to work between
> two calcs, but it can be used to link to your PC as well. It has a range of about 3.5m at the most. I am currently working on a high output version that should work at almost a 50m. Also, it does not have to be in
> direct-line-of-sight. It has about a 30 degree range. It NEEDS the 5v to power the IC's, it is NOT a SPINterface project. And finally, yes the RS-232 driversc ould be used as a TI-modem basis.
>
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References:

RE: TI-H: new schematic

From: Christopher Kalos <raptorone@stuytech.com>