Alt-BEAM Archive

Message #05544



To: beam beam@sgiblab.sgi.com
From: "Ben Hitchcock" ben@wollongong.apana.org.au
Date: Fri, 06 Aug 1999 14:49:55 +0000
Subject: [alt-beam] Low power oscillator


Although not strictly BEAM, I am putting this question to the list in the
hope that someone here can help me...

I'm doing a project for university where I need a small, low power
oscillator. The oscillator must have an on-time of about 0.2 seconds, and
an off time of 5 seconds.

I would like standby power consumption of less than say 0.1 mA.

The voltage used is 12 volts (I can't change that). At the moment, I have
tried a couple of designs of oscillator, using a 74C14 chip but the best
power consumption I get is about 3 or 4 milliamps - way too high for the
poor little 12 volt battery.

The whole circuit is going to fit inside one of those 'car alarm
transmitters' which use a 12 volt battery which is about half the size of a
AAA battery. The whole thing fits very easily into a pocket, or onto a
keychain.

Any help would be greatly appreciated.

Thanks,
Ben Hitchcock



5545 Fri, 6 Aug 1999 08:43:14 -0400 [alt-beam] Low power oscillator beam Ben Hitchcock
> Although not strictly BEAM, I am putting this question to the list in the
> hope that someone here can help me...
>
> I'm doing a project for university where I need a small, low power
> oscillator. The oscillator must have an on-time of about 0.2 seconds, and
> an off time of 5 seconds.
>
> I would like standby power consumption of less than say 0.1 mA.
>
> The voltage used is 12 volts (I can't change that). At the moment, I have
> tried a couple of designs of oscillator, using a 74C14 chip but the best
> power consumption I get is about 3 or 4 milliamps - way too high for the
> poor little 12 volt battery.
>
> The whole circuit is going to fit inside one of those 'car alarm
> transmitters' which use a 12 volt battery which is about half the size of
a
> AAA battery. The whole thing fits very easily into a pocket, or onto a
> keychain.
>
> Any help would be greatly appreciated.
>
> Thanks,
> Ben Hitchcock
>
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