how to build a latching relay circuit

ANY Timer Rrelay
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RHX DC 12V Delay Timer Switch Adjustable Module 0 to 10 Second NE555 Electrical New

  • Delay modue:delay connect module. One size: 77 x 23 x 18mm (length x width x height)
  • The operating voltage: 12 volts DC; (otherwise 5V optional). The use of high-performance timing CPU design.
  • The power indicator LED and switch trigger timing indication LEDs;
  • The output can be connected to AC 250V 10A DC 30V 10A load;
  • There is the chronopotentiometry regulation time, adjustable from 0 to 10 seconds by default, or by changing the Capacitance adjustment time longer.

This is a delay turn-on module.
Module based on: NE555 chip
Dimension: 68 (L) * 22 (W) * 18 (H) mm (with potentiometer )
Input voltage: DC12V
Adjustable time: 0 to 10 seconds
Control voltage: AC 0~250V / max. 10A, DC 0~30V / max. 10A
Max. load: 2200W
For applications of£º
Vehicle equipment-delay to prevent car ignition, prevention of high sudden current to burn components and devices.
Main Chip (NE555) Characteristics:
Timing from microseconds to long hours
Simple circuit design
Precision Pulse Generation / Timing
Adjustable Duty Cycle
Monostable or Astable Operation
Countless Application and Information Sources

Buy Now!
Price: $4.89


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Nikolaos asked What would be needed to make your own 'Robo-Dome" for a SCT?

I've been considering for a bit to construct a Robo-Dome type set-up, and run wires from there, to my computer. Even get a short shipping container, find an empty dark place, and use it as a 'semi-mobile' observatory. I've been thinking about it conceptually, but like to know if anyone has done this before, or can give me ideas that I may have not come to yet. Thanks.

And got the following answer:

Not knowing what your skills are at programming,electrical and mechanical stuff and how far away you are going to be from the observatory (back yard to other side of the planet). You have some basic things to consider. Power - Does your site have shore power on site? Or will you need to run a generator or use solar cells and batteries? You'll need to figure out overall current demands for things like motors, computers, telescope, cameras, dew heaters and so on. My observatory (I guessing) runs about 5 amp hours with the scope, computer, monitors, USB hubs and cameras running at the same time. Something else to think about - What happens if you loose power completely? How will you be able to button up the observatory? If its a short walk, that's one thing. If you have to drive for hours, that's quite a bit different matter. Security - If the observatory is going to be aways away from your location, you need to be able to not only lock it up remotely but also monitor what's going on. That might means some sort of monitored alarm system, webcams and microphones. Internet access - This day and age, its really nice to have that on site. Then you can login remotely, run the whole system, get your pictures or data and monitor the the facility. You can use dial up for monitoring and control, but high speed for high bandwidth stuff for photos. Dome vs. Roll Off Roof. Domes are what people expect an observatory to look like. So if its at a remote location, it might be an easy to spot target for someone looking to break in. Domes also mean more power to keep the slit in line with where the scope is pointing (unless you're using a clamshell design). But you'll need safety switches that tell you if everything opened and closed as expected and a way to auto stop, if something (like the scope), get in the way. Roll-offs can be made to look more like a shed and as such, less tempting of a target. And they are easier and cheaper to build. You can use a garage door opener with a wire loop to push open and pull close the roof (depending on your power source, could be AC or DC). But you'll need to install safety switches to stop the thing if it bumps into something. You'll also need a way to park the scope before the roof closes. And a latching system to secure the roof when closed. Weather - Depending on your location, you could have high humidity along with heat or heat with low humidity. Or like me here in Oregon. Nice summers, but cold and damp winters. So you may need to run a heater or dehumidifier, just to keep the observatory from rusting over or growing mildew. If your not that far from your observatory (walking distance) and you have good power and internet access at the site, observatory control could be nothing more than having a motor control system and a joystick with a couple of buttons. The system could of set of wires that goes from your location (say in the house) to the observatory. Have a little toggle switch that jogs the dome left or right and a pair of buttons that opens and closes the dome. Or if you go with a roll off roof, just open and close with contacts that tell the roof to stop at the end of its run. The control lines would be low voltage (signal) lines and the observatory would have the control relays. This way your not switching house power directly, but through isolated relays (less of a hazard from electrical shocks or blowing up circuit breakers). The other thing to do is to search the web and see what others have done - http://massapoag.org/astro_2/observatory/dome_control/dome_control.html http://www.jatobservatory.org/control.html More than a few sites here don't work. The page has never been updated. http://obs.nineplanets.org/obs/obslist.html

The how to build a latching relay circuit function incredibly properly with different applications which are certain to power distribution and protection. The relays include wide adjustment ranges having a scale that is definitely simple to read either in three or four digits in accordance with the model. These how to build a latching relay circuit enable in growing the flexibility from the applications, cut down the general power and maintenance costs. There are actually relays which are utilised for general purposes which come in reputable styles with rapid replacement choices. And you will find models which can be applied for industrial applications and heavier duty applications that work on massive loads. These merchandise are created to meet the lifetime industrial control requirements with the applications.
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