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一些其他的工作坊結束的home work記錄

1。solid state relay－ the easiest way is to use 5V mechanical relay, in the spec for solid state relay watch for control current – in your example on page 4 there is 15mA – so for 5v you need a V/A = Ohm -> 5V / 0.015 A = 333,33 Ohm, 333 Ohm doesnt exist so take a 330 Ohm or 470 Ohm will also work

Made in Malaysia OMRON DC-12V

Advice from Tobi: 如果買了12v的有 two voltages in your circuit， 5V from arduino and 12V for relais，for 110V you should solder some screw plugs an a board and make it stable – so no wire is flying around,  for easy prototyping you can use the pre fabricated proto boards. Remember to hook the solid state direct to arduino the LED inside while burne out.

His example : A relais with a transistor – but now we where using L293 bridge for mechanical relais and a resistor for solid state, these are the easiest – but expensive.

a relais with a transistor

固態繼電器solid-rsr1

conductor copper board

Fabricated proto boards

on the otherside are copper holes

screw plugs