Physical computing: HowTo control LEDs, electric motors or servos through GPIOs





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Published on Sep 14, 2014

Table Of Content:

00:05 Introduction
01:01 Output pin
01:53 Maximum current / minimal resistance
02:55 Attaching LEDs
05:02 Sink current
06:17 Source current
07:01 Current between two pins
08:20 Electronic boards
09:09 Pulse-width modulation
10:34 Amlifying signals by field-effect transistors
15:00 Gate voltage
16:45 Switching a tiny electric motor (fan)
17:33 12V operating voltage
19:24 Power transistor (wiper motor)
22:05 Inverted switching
23:48 Don't forget a heat sink!
24:43 Operational amplifier
28:18 Inverting signals by Op-amps
29:24 Switching relays
31:34 Cascading relays
32:09 Electromechanical H-bridge
32:48 Transistor H-bridge
34:46 Attaching servos
36:15 Servo with external power supply
37:40 Input mode of GPIOs
38:41 Hysteresis
40:11 Bush buttons and switches
42:13 Communication between computers
45:01 Analog inputs
46:43 Robot arm with servos
48:28 Curiosity Pi
48:58 Battery powered off-road rover
50:19 R.I.T.T. (Raspberry Intelligent Transportation Technology)

Project page:


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