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5cm for UT281A and 45
’ a solid-state relay is really just an IR LED and a photometric sealed up into a little box
If you use the 4051 as a Demultiplexer you can choose between 8 different outputs and select just one you want to write at the time
customs: demolition phone
Crystal 5mm Green Led Light Emitting Diode SMD rework station 5cm for UT281A and 45What is an LED? Who doesn't love LEDs? They are bright and blinky, or soft and elegant. They're festive! They're colorful! They're everywhere and they're a lot of fun. We love LEDs when we write tutorials because most of electronics hackery is hidden in chips, or goes very fast and we can't see or sense it without expensive equipment. But LEDs are easy to see for everyone this way we can visually identify what is going on inside our microcontroller.