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Two Stupid Questions

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Hi,
I need answers to these two stupid questions:

#1-How can I use a CMOS-level output (logic HI) to trigger a 555 timer for 1 hour (delay), which in turn triggers another 555 timer for 1 minute (alarm)? (Circuit needed!)

#2-Does anyone have a non-rechargeable battery-backup circuit for 12-volts? Back-up MUST occur within 40 nS of AC Mains failure. Injection time is based on 74AHCT00 series CMOS requirements.

Thanks.

p.s. Please forgive me for double-posting, but I need more help.
 

tansis

New Member
the web has more than one web site with a javascript simulator for the 555 timer any good search should turn one up, as for battery backup what's wrong with with with a battery / diode on the supply rail?
 
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