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gca-pi06-en
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gca-pi06-en [2019/02/09 13:31] phg [Important note] |
gca-pi06-en [2020/04/01 21:07] (current) smitt48 typo |
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| =====Power supply difficulties===== | =====Power supply difficulties===== | ||
| - | The choice of using 5V adaptors for supply of RocNet was obvious.\\ | + | The choice of using 5V adapters for supply of RocNet was obvious.\\ |
| - | There is a massive assortiment of 5V adaptors to choose from, and also for good prices.\\ | + | There is a massive assortiment of 5V adapters to choose from, and also for good prices.\\ |
| But depending on the load drawn from the 5V adapter the following problems could occur: | But depending on the load drawn from the 5V adapter the following problems could occur: | ||
| * The Raspberry Pi shuts down or reset by itself. | * The Raspberry Pi shuts down or reset by itself. | ||
| - | * The Ethernet connection is signalled OK by the Raspberry LEDs but does no longer operate correctly. | + | * The Ethernet connection is signaled OK by the Raspberry LEDs but does no longer operate correctly. |
| * No SSH session is possible or an existing is stalled. | * No SSH session is possible or an existing is stalled. | ||
| * RocNetNode does not respond in the LAN. | * RocNetNode does not respond in the LAN. | ||
| * The middle position of the Pi04 acts the same as the left position.\\ | * The middle position of the Pi04 acts the same as the left position.\\ | ||
| - | It prooves that all these negative aspects are referring back to the too-low voltage output from the adaptor itself.\\ | + | It proves that all these negative aspects are referring back to the too-low voltage output from the adapter itself.\\ |
| The indicated voltage of 5V is not very seldom as low as 4,2 or 4.3 volt.\\ | The indicated voltage of 5V is not very seldom as low as 4,2 or 4.3 volt.\\ | ||
| Adding that to the small but normally acceptable loss in the RJ12 cables, could lead to the effects as indicated above.\\ | Adding that to the small but normally acceptable loss in the RJ12 cables, could lead to the effects as indicated above.\\ | ||
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| PI 3 and GCA_PI06 are too long (> 0,5 m).\\ | PI 3 and GCA_PI06 are too long (> 0,5 m).\\ | ||
| The used RJ12 cables can not handle that current.\\ | The used RJ12 cables can not handle that current.\\ | ||
| - | So two possiblities are to be mentioned to overcome this minor problem.\\ | + | So two possibilities are to be mentioned to overcome this minor problem.\\ |
| * 1 Shorten connection between PI 3 and GCA_PI06 to less than 0,5 m.\\ | * 1 Shorten connection between PI 3 and GCA_PI06 to less than 0,5 m.\\ | ||
| * 2 Use RJ45 Ethernet cables and connectors between GCA-PI06 and PI 3\\ | * 2 Use RJ45 Ethernet cables and connectors between GCA-PI06 and PI 3\\ | ||
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| \\ | \\ | ||
| + | ===== Need more Power? ===== | ||
| + | It is possible that even his power supply does not match your needs.\\ | ||
| + | So the idea comes near to use more than one GCA-06 units in the RocNet network.\\ | ||
| + | Basically no problem but please use separate adapter/transformer for supply of GCA_PI06.\\ | ||
| + | Using the same adapter/transformer for multi GCA_PI06 units can cause many unexpected problems.\\ | ||
| + | It is strongly discouraged. \\ | ||
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| ===== Hardware ===== | ===== Hardware ===== | ||
gca-pi06-en.1549715477.txt.gz · Last modified: 2019/02/09 13:31 by phg
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