dr@ski.UUCP (David Robins) (04/04/85)
Recent net.analog news queried how to turn-on equipment, controlled by
the turning-on of another piece of equipment. Several of us had
suggestions for circuits to accomplish this.
At the 10th Computer Faire, I just found a company that manufactures a
power strip, especially designed for personal computer systems. The
monitor is plugged in to the control outletm and when the monitor is
turned on, the rest of the strip outlets go on, thus sending power to
your CPU, printer, and other peripherals. There is also built-in
surge protection (quantity undefined).
This Auto Turn-on Power Strip with Surge Protection is Model #EZSTRIP.
The company is:
EZTEK
15060 Redwood Way
Sonora, CA 95370
(209) 533-0341
Price is regularly $79.95. The Faire special was $49.95.
--
David Robins, M.D.; Smith-Kettlewell Institute of Visual Sciences
2232 Webster St; San Francisco CA 94115
415/561-1705
{ucbvax,dual,sun}!twg!ski!dr
dual!ptsfa!ski!drcem@intelca.UUCP (Chuck McManis) (04/15/85)
Why the fuss he says? Heathkit has been selling a 12 outlet strip for more than
a year now that has 1 always on socket, 1 control socket, and 10 "controlled"
sockets. It also includes transient and spike suppression. The whole thing is a
kit (I put mine together in about 3 hours ) and costs $50 regularly. When you
get a catalog with the 10% off offer its only $45. I am quite pleased with it.
--Chuck
--
- - - D I S C L A I M E R - - -
{ihnp4,fortune}!dual\ All opinions expressed herein are my
{qantel,idi}-> !intelca!cem own and not those of my employer, my
{ucbvax,hao}!hplabs/ friends, or my avocado plant. :-}darrelj@sdcrdcf.UUCP (Darrel VanBuer) (04/20/85)
I have a homebrew auto outlet (based on a electronics article of 10 years
ago) which uses all of three components. Here is a crude diagram.
White --------------------------------------------------------
(AC plug) | Master | Controlled
= =
| |
Black --+-->|-->|--+------+--^v^v^v----\ |
+--|<--|<--+ G \|>| |
+--------------------------------|<|-----------------+
MT1 MT2
Bridge rectifier 10 ohm Triac
or 4 diodes resistor
Voltage rating of bridge is not important, current rating should exceed the
master load (e.g. mine has 3 amp diodes, 300 watts worth). Even a small
load will trigger the switch--minimum is the trigger current of the triac.
The triac needs voltage and current ratings to match the load (e.g. mine has
200 V 6A rating for 110V 600 watts).
The resistor is 1/2 watt.
The effect is about a 1.5 volt drop on both outlets, switching noise is
negligible since the triac gets turned on within a few volts of each zero
crossing.
(Just to clarify the diagram, the bridge is in series with one outlet, the
triac in series with the other. The resistor connects the gate to the hot
side of the master outlet).
--
Darrel J. Van Buer, PhD
System Development Corp.
2500 Colorado Ave
Santa Monica, CA 90406
(213)820-4111 x5449
...{allegra,burdvax,cbosgd,hplabs,ihnp4,orstcs,sdcsvax,ucla-cs,akgua}
!sdcrdcf!darrelj
VANBUER@USC-ECL.ARPA