Recording time

[sl@exabyte]

I need to record the time a device (say A1) is switched on (nice if it
records the time the device is switched off).

I suppose that I need to wire the power cable through this device and from
this device connect to A1.

Is there any such device ? Or any other method of doing this ? (the device
A1 is at home).

Thanks.

 

[N_Cook]

sl@exabyte <ecp_gen@my-rialto.com> wrote in message
news:iuegau$s39$1@news.albasani.net...

I need to record the time a device (say A1) is switched on (nice if it
records the time the device is switched off).

I suppose that I need to wire the power cable through this device and from
this device connect to A1.

Is there any such device ? Or any other method of doing this ? (the device
A1 is at home).

Thanks.

A basic digital watch , assuming it starts from cold at 00:00 , 01 Jan 1981
or whatever .
And a latch to keep the power to watch going . Another watch and another
latch set by the first latch.
Then subtruct the hours and mins from the reading time

 

On Wed, 29 Jun 2011 15:39:08 -0700, "sl@exabyte"
<ecp_gen@my-rialto.com> wrote:

I need to record the time a device (say A1) is switched on (nice if it
records the time the device is switched off).

I suppose that I need to wire the power cable through this device and from
this device connect to A1.

Is there any such device ? Or any other method of doing this ? (the device
A1 is at home).

Thanks.

An AC hour meter should work. It would be connected across the
switched AC line where goes to device A1. They cost about $10US on
ebay:
http://cgi.ebay.com/Tech-Hour-Meter-AC-100-250V-Boat-Car-Truck-Tractor-/200587032950?pt=LH_DefaultDomain_0&hash=item2eb3eb3976

This one displays up to 99999.9 hours then cycles back to 0.

John

 

[Bennett Price]

On 6/29/2011 3:39 PM, sl@exabyte wrote:

I need to record the time a device (say A1) is switched on (nice if it
records the time the device is switched off).

I suppose that I need to wire the power cable through this device and from
this device connect to A1.

Is there any such device ? Or any other method of doing this ? (the device
A1 is at home).

Thanks.


An analog clock, either battery or AC, plus a DPST switch.

When the switch turns A1 on, it turns the clock off, thus
indicating when A1 was turned on.