I have an ac relay jqc-3fc(t73)dc5v that I am trying to use with a atmega and drive with 5v. Is the wiring as shown in the picture a good idea? Considering that ac and DC need to be very close together on the pins? The brass thing will be carrying 220 v ac. The jumpers carry DC. The relay will drive the pump as shown in the picture. The wooden box will be used to contain the relay and ac lines. relay imagewiring.the relay will drive thisenter image description here

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    \$\begingroup\$ I really don't like that big brass thing exposed with 240 V. I suggest using one of the "Arduino" relay modules - a relay mounted on a small PC board with screw terminal blocks, and an optoisolator for the control input. That will have much safer connections on the AC side. \$\endgroup\$ – Peter Bennett Nov 20 '18 at 5:53
  • \$\begingroup\$ I agree - I would solder a wire to the relay and insulate with heat-shrink tubing, then put the other end of the wire in the brass thing, ideally located in a plastic box so that it can't be touched. \$\endgroup\$ – John U Nov 20 '18 at 11:00

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