gca-pi08-en
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gca-pi08-en [2018/12/04 14:50] – [GCA_PI08 16 channel module with max 40V 100 mA output per channel] rjversluis | gca-pi08-en [2021/09/04 08:52] (current) – [How to find out which pcb I have?] rjversluis | ||
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[[english|{{ | [[english|{{ | ||
[[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en# | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en# | ||
- | * [[GCA1-PI01-en|GCA-PI01]] | [[: | + | * [[GCA1-PI01-en|GCA-PI01]] | [[: |
* [[mgv-overview-en|The GCA modules]] | * [[mgv-overview-en|The GCA modules]] | ||
* [[: | * [[: | ||
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Each port can drive up to 100 mA max.\\ | Each port can drive up to 100 mA max.\\ | ||
The GCA_PI08 is part of the RocNet network, Rocrail provides of course all the setting options that are needed.\\ | The GCA_PI08 is part of the RocNet network, Rocrail provides of course all the setting options that are needed.\\ | ||
- | See https:// | + | See: __**[[:rocnet: |
The GCA_PI08 has a connection J3 \\ | The GCA_PI08 has a connection J3 \\ | ||
* for power in of max 40 V dc (V+, V-) | * for power in of max 40 V dc (V+, V-) | ||
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And all outputs are also available on a 20 pin flatcable header.\\ | And all outputs are also available on a 20 pin flatcable header.\\ | ||
This poor quality type of connector is not really favorite inside GCA boards, but is possible anyway.\\ | This poor quality type of connector is not really favorite inside GCA boards, but is possible anyway.\\ | ||
- | | {{: | + | | {{: |
- | \\ | + | |
The standard used PSS 254/PSK254 connectors might be not the first choice of many railroaders, | The standard used PSS 254/PSK254 connectors might be not the first choice of many railroaders, | ||
can handle a current of at least 1,5 amp att each pin and is very rigid.\\ | can handle a current of at least 1,5 amp att each pin and is very rigid.\\ | ||
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+ | ==== How to find out which pcb I have? ==== | ||
+ | \\ | ||
+ | On version 1.x there is no C3 nor R3.\\ | ||
+ | |||
+ | \\ | ||
+ | ===== The version 1 hardware files ===== | ||
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+ | | {{: | ||
+ | | {{: | ||
+ | | {{: | ||
+ | | {{: | ||
+ | \\ | ||
+ | ===== Version 2 ===== | ||
+ | In the first edition, it was possible to damage the PC9622 chip, when suppply was changed from 15 to 5 Volt.\\ | ||
+ | To avoid that, v2 has an extra capacitor.\\ | ||
+ | \\ | ||
+ | | {{ : | ||
+ | | {{ : | ||
+ | | {{ : | ||
+ | \\ | ||
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- | ===== Important warnings | + | ===== Important warnings |
If you are using external power to be connected to J3, please be sure that this power is 100% isolated from anything else.\\ | If you are using external power to be connected to J3, please be sure that this power is 100% isolated from anything else.\\ | ||
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it appears that capacitor C2 is fully charged.\\ | it appears that capacitor C2 is fully charged.\\ | ||
Since there is no more drain for that capacitor, it will put the full charge into the 5V circuit, | Since there is no more drain for that capacitor, it will put the full charge into the 5V circuit, | ||
- | Future boards version | + | Version |
- | One other option is to fix a resistor of +/- 2.2 KOhm between the + and - of the large Elco.\\ | + | An option |
Just fit it at the bottom side of the pcb.\\ | Just fit it at the bottom side of the pcb.\\ | ||
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- | ===== The hardware files ===== | + | |
- | | {{: | + | |
- | | {{: | + | |
- | | {{: | + | |
- | | {{: | + | |
- | \\ | + | |
===== Jumper JP1 en power supply ===== | ===== Jumper JP1 en power supply ===== | ||
The on-board chip is connected to 5 V of the RocNet bus.\\ | The on-board chip is connected to 5 V of the RocNet bus.\\ | ||
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Indication on board shows the right settings for this jumper.\\ | Indication on board shows the right settings for this jumper.\\ | ||
\\ | \\ | ||
- | :!: **It must be absolutely certain that during operation the jumper between pin 2 and 3 may only be connected when capcitor | + | :!: **In version 1 it must be absolutely certain that during operation the jumper between pin 2 and 3 may only be connected when capacitor |
- | \\ | + | In version 2 that action is protected. |
+ | ** :!: \\ | ||
===== Total possible led outputs in one RocNet setup ===== | ===== Total possible led outputs in one RocNet setup ===== | ||
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+ | ==== a small correction needed ==== | ||
+ | It appears that version 1 circuits are missing the internal ground connection with the two RJ12 connectors\\ | ||
+ | That can easily be solved with the short wire bridge marked in this picture:\\ | ||
+ | {{: | ||
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gca-pi08-en.1543931431.txt.gz · Last modified: 2018/12/04 14:50 by rjversluis