I am using a light activated switch to close a relay and turn on a motor. The problem I am having is that the LDR will move out of the light in a very short time period from the motors movement. In turn the relay will always be opening and closing each time the LDR moves back into the sunlight as the angle of the LDR changes, and the angle of the sun does too. This will wear out my relays in no time and could be noisy. Essentially the LDR is following the sun but must go into the shade for a longer period of time, until the suns angle changes and reaches it again. I need to run the motor (keep the relay closed) for just a few seconds 4-8 seconds probably. This way the relay will only be activated every 10 minutes or so. I am hoping there is a timer circuit of some sort that will do this.
This light activated circuit very similar to mine accept there is no D2 and R6, and the pot is next to the op-amp. http://www.electroschematics.com/wp-content/uploads/2010/07/light-activated-switch.jpg
I was hoping that I could stay away from any signal type stuff that is necessary in a digital circuit. I haven't toyed with electronics this much for about 20 years, and the digital Arduino projects are well over my head.
Thanks,
Brentg
This light activated circuit very similar to mine accept there is no D2 and R6, and the pot is next to the op-amp. http://www.electroschematics.com/wp-content/uploads/2010/07/light-activated-switch.jpg
I was hoping that I could stay away from any signal type stuff that is necessary in a digital circuit. I haven't toyed with electronics this much for about 20 years, and the digital Arduino projects are well over my head.
Thanks,
Brentg
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