please help me with the concept, i explain after the situation introduction
i have been recently looking into arduino control of electrical outlets. unfortunately the popular relay boards all use a relay that uses a constant power in the coil to activate the switch. it seems even sellers on ebay are uninformed and selling some of these as latching switches.
i was looking into reed relays and saw that the BESTAR ELECTRIC LTD. BR-1050 only can run 10W total, so it isn’t suitable for mains power of at least 200W.
Mercury switches and Mercury wetted relays seem to be the correct pieces of reliable equipment, especially for durability.
as far as mercury wetted relays go, i have only seen the hgrm-55211-p00 which only can run 100W, 500V, 2A max.
also i am fuzzy/not totally comprehending about how to set up the circuit.
if you will please review my concept and advise me on what i may use/need/and need to know
i figured from a video called "Using NPN Biploar Transistors with Arduino, PIC " by Lewis Loflin on youtube that it will need a darlington transistor configuration.
if i need to run a coil or something that may feed back high voltage when shut off, it will seemingly need diodes to protect the transistors and arduino pin which can handle only 20mA.
arduino grounds to negative and the exact setup of the transistor still confuses me as the base is P in NPN.
the other part to the concept is running two wires per terminal from a battery to power the coil in an on and a reversed off configuration. the positive would have a diode in and out on the two wires and the same for the negative.