plug in digital electronic timer can be modified to work on 12vdc requires replacement relay and mains input components linked out..n things, or use a 12v dc door entry security programmer i also sell these programmers on ebay for solar/wind installations my ebay id is essex3lv6 or i can modify these plug in timers Kind Regards Geoff essex@gotadsl.co.uk

Hello Matt,
I just got to this page and I am not sure if you have already found the solution for your application. We have a 12V DC Timer that works pretty well on our application. Actually we use it on a chicken shed to open and close the door in the morning and evenings. We put together a system using an electric antenna (car antenna) which extends and opens the door in the morning and when the timer cuts the power, at the end of the day, it shuts the door until next morning. The door is like a a dog entrance door and is just swings vertically but it is firmly maintained closed during the nigh. The part number for the timer is BRX1224PTS1 the brand is Brazix. If you Google it you will find it.

Hi,

Have you looked at PICAXE microcontrollers - (basically PIC microcontrollers with comprehensive high level instruction set which takes all the grind out of a native PIC setup)?

Take a look at the PICAXE site: http://www.rev-ed.co.uk/picaxe/

I find them extremely versatile and very useful. By way of example, one of my projects is a mole scarer which runs from a 6V 10Ah battery (via. 5V low dropout regulator). It works without any charging for over 3 months at a time, despite driving 4 buzzer intermittently.

bheideman, the PICAXE could be powered from the 12V battery via regulator and drive a MOSFET at programmed intervals to run 12V pumps - such as Eheim 12V 1A (nicely engineered!). (You could have a light sensor feeding into one of the inputs to detect the start of day too if you wanted).

Hope this helps.

Regards
E.

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