Solve Raspberry Pi general problemsAlmost all problems that occur during operation with Raspberry Pi often have the following causes:
how to Measure Raspberry Pi power consumption
There are many different statements and statements about the power consumption of Raspberry Pi. One or the other has actually measured the power consumption times. And now these values are haunting in forums and on blogs. Unfortunately, these measurements are of little help if it is not known how and what was measured accurately.
Both the measurement and the measurement result must then be viewed critically. Usually, such a result is worthless if nothing is known about the results of the measurement. To make things worse, each measurement results must always be interpreted correctly.
The Raspberry Pi Model B+ has a common 4-pin jack plug for audio and video signals. The datasheet or the circuit diagram of the model B+ shows the following picture detail for the assignment of the jack socket:
 | |||
| 1 (plug) | 2 | 3 | 4 (top) |
| video | Ground (GND) | Right (right audio channel) | Left (left audio channel) |
The assignment is identical to the Apple iPod. However, not with the iPhone or iPad. There is no video output, but a microphone input, but the Raspberry Pi does not. Audio Enhancements The analog audio output of the Raspberry Pi is extremely bad. Noise, humming and a miserable sound are simply no fun. If it goes beyond experimentation, then audio extensions for GPIO or USB are recommended.
Occupancy GPIO for Raspberry Pi (Raspberry Pi GPIO assignment)
Description of the individual GPIO pins
Of the total of 26 or 40 pins (depending on the models) of the GPIO header, 17 or 26 pins can be programmed as either input or output, allowing them to be used for a variety of enhancements and electronic and digital circuits. The remaining pins are for power and other purposes.
Raspberry Pi GPIO is the abbreviation for General Purpose Input Output. This designates programmable inputs and outputs for general purposes
The gpio are led out as a solder pin or pin in the form of a pin header and serve as an interface to other systems or circuits to control them via Raspberry Pi. When programmed, Raspberry Pi can accept digital signals from outside (input) or send signals to the outside (output).
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