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From: Oliver Betz
Subject: Re: Line-powered EIA-232 interface
Date: Tue, 17 Dec 2002 18:37:03 +0100
References: <firstname.lastname@example.org> <email@example.com> <firstname.lastname@example.org>
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email@example.com (Allan Herriman) wrote:
>>Ack. And the data sheets don't say too much about 766x startup without
>yes, that's why I said:
>>> Put a diode from your laptop +3V rail to the '7660 +ve rail to avoid
>>> startup problems.
Maybe I misunderstand completely what you intend to do.
The OP wrote: "Want to interface it to a (laptop) PC's EIA-232
interface." IMHO no possibility to access the "laptop +3V rail".
Supplying the 766x from the Li battery is also no option, since "the
battery should last several years" and 0,2mA * 40000h is 8Ah...
Oliver Betz, Muenchen
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