8.3.3 Input wiring (e.g.: light barrier) with PNP-transistor
Calculation of R1 as above with NPN Transistor.
8.3.4 Input wiring with a switch and an external voltage source
Calculation of R1 as above with NPN Transistor.
8.3.5 Input wiring with an external 5V TTL signal
Make sure that the external signal can source the LED minimal current (>10mA). Use R1 also.
MotionBLITZ®Kit Manual Ver.2.0 45
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