D
Dave
- Jan 1, 1970
- 0
I would like to build a device which turns an AC power outlet for a
predetermined (ideally adjustable or programmable) time. I will use it to
power a battery charger on my boat. I've got a fully automatic battery
charger, but not a terribly expensive one. This charger charges the battery
until a "full" indicator comes on, at which time charge voltage shuts off.
However, the sensor that detects "full" is a simple voltage sensor, which
appears to toggle at about 14.5VDC. Well, as the battery settles down after
charging ceases the voltage drops over 10 minutes or so until it reaches
14.4VDC, at which time the charger turns on again. As the boat is
unattended, I'd rather not have the charger turning on and off indefinitely.
Instead, I'd like a simple box with one button on it. I push the button, AC
circuit that powers the charger is energized for, say, 8 hours, then shuts
off. I have seen homemade versions of this device at a high-tech company I
worked at, where the lab manager built a bunch and hooked up all of the
solder stations to them so that when people forgot to shut them down, it
would happen automatically.
Any help greatly appreciated.
Dave
predetermined (ideally adjustable or programmable) time. I will use it to
power a battery charger on my boat. I've got a fully automatic battery
charger, but not a terribly expensive one. This charger charges the battery
until a "full" indicator comes on, at which time charge voltage shuts off.
However, the sensor that detects "full" is a simple voltage sensor, which
appears to toggle at about 14.5VDC. Well, as the battery settles down after
charging ceases the voltage drops over 10 minutes or so until it reaches
14.4VDC, at which time the charger turns on again. As the boat is
unattended, I'd rather not have the charger turning on and off indefinitely.
Instead, I'd like a simple box with one button on it. I push the button, AC
circuit that powers the charger is energized for, say, 8 hours, then shuts
off. I have seen homemade versions of this device at a high-tech company I
worked at, where the lab manager built a bunch and hooked up all of the
solder stations to them so that when people forgot to shut them down, it
would happen automatically.
Any help greatly appreciated.
Dave