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The MM106 module from Velleman is a opto isolator with open collector
output. This breakout board has been conceived so to supply whichever
circuit operating at a TTL level with an opto-isolated input: that is to
say, in order to transmit a logic condition between two circuits, while
still keeping them separated from a galvanic point of view. The heart of
the circuit is the TLP181 photocoupler, composed of an infrared LED that
is connected between pins 1 (anode) and 2 (cathode), leaning towards the
base of a NPN phototransistor, that is in turn connected to the
collector at pin 5, and to the emitter at pin 4 (in this photocoupler,
the base is not connected to the exterior via pins).
The breakout board’s power source is a 5V DC one, and the absorptionis a
very small one: just 1 milliampere at most. Thus you may couple it to
any circuit, even if battery-powered, or when using small photovoltaic
panels or other Energy Harvesting solutions. |
