Ray, I designed a smart circuit for my 3500 w RV generator. I didn't want to buy a bigger generator that uses more fuel, is louder and still doesn't have a 110v 30 amp out.
So, I designed a smart circuit, using relays, contactors, current sensors, 24 vac transformers and timers. Many of the parts I already had. All the parts are commonly used on furnaces and air conditioners. None of the parts were expensive.
My smart circuit will automatically turn off all other loads when it senses the pump is on. After pump shuts off, another circuit instantly powered up. This circuit is for hotplates, lamps, coffee pot. Then a timer will later send power to the refrigerator. I have the timer set for 5 minutes delay. If pump ever comes on, all the other loads are turned off and the cycle starts over.
I no more than finished building the smart circuit, and the power went off for 7 hours. At which time it my smart circuit worked perfectly.
So, I made a new and improved circuit, bought a second RV generator with electric start and a 15 second delay before generator produces electricity. This genny also has a remote start, so I can push a button and start it inside, sweet.
The third generation to my smart circuit, has a feature that will put a shunt in line with the output. Currently I'm using a diode as a shunt. I'm using the diode for up to one second. I'm using this feature for my 4 hp electric chainsaw, which draws very close to 70 peak amps when it's first turned on. The diode soft starts motor. After one second motor gets full power. Because the motor is turning and generating a reverse EMF after one second, the peak current stays within the range of genny when full power is applied. Genny is never stressed. I never have to plug or unplug loads. I can get buy with the genny I already had.
Not to mention, it was fun building something that I can't buy.
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Today's Featured Article - The Ferguson System Principal An implement cutting through the soil at a certain depth say eight inches requires a certain force or draft to pull it. Obviously that draft will increase if the implement runs deeper than eight inches, and decrease if it runs shallower. Why not use that draft fact to control the depth of work automatically? The draft forces are
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