gca-pi07-en
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| + | ====== GCA-PI07 Transformer Sensor ====== | ||
| + | [[english|{{ | ||
| + | [[english|Content]] -> [[hardware-en|Hardware]] -> [[hardware-en# | ||
| + | * [[GCA1-PI01-en|GCA-PI01]] | [[: | ||
| + | * [[mgv-overview-en|The GCA modules]] | ||
| + | * [[: | ||
| + | \\ | ||
| + | | Discontinued, | ||
| + | \\ | ||
| + | =====Introduction===== | ||
| + | Sensoring trains is a very essential part of automatic train control.\\ | ||
| + | Rocrail is no exception for that.\\ | ||
| + | There are various ways of keeping track of your trains.\\ | ||
| + | For a longer time GCA93 current detector has been widely used because its excellent reliability.\\ | ||
| + | This GCA93 is also, connected to a GCA_PI02 very useful for RocNet network.\\ | ||
| + | But there is one very little disadvantage, | ||
| + | It looses 1.2 V of your booster power.\\ | ||
| + | In practice it is hardly noticeable, specially with the modern decoders with load control.\\ | ||
| + | The GCA_PI07 is made in a different way, which avoids this 1.2 V lost.\\ | ||
| + | There is hardly any loss at all (approx 5 mV)\\ | ||
| + | The disadvantage is a larger board, compared to GCA93.\\ | ||
| + | Max four of these boards are to be connected to one Raspberry Pi.\\ | ||
| + | A dip-switch on board selects the address, see table below.\\ | ||
| + | The sensibility of two groups of 4 inputs can be influenced by jumpers.\\ | ||
| + | \\ | ||
| + | ===== Features ===== | ||
| + | * 8 current inputs on each board | ||
| + | * Direct link to I2C in RocNet. | ||
| + | * Very low power loss due to use of transformers.\\ | ||
| + | * Total 32 sensors inputs to one Raspberry Pi.\\ | ||
| + | * The load per sensor is reported to Rocrail for **[[: | ||
| + | |||
| + | |||
| + | \\ | ||
| + | |||
| + | =====The Hardware===== | ||
| + | ^ Final product ^ Professional board ^ | ||
| + | | {{: | ||
| + | \\ | ||
| + | ===== Dip Switch settings ===== | ||
| + | Maximum of 4 boards | ||
| + | ^ sensors | ||
| + | | 1..8 | OFF | OFF | | ||
| + | | 9..16 | OFF | ON | | ||
| + | | 17..24 | ||
| + | | 25..32 | ||
| + | \\ | ||
| + | |||
| + | ===== Jumper settings ===== | ||
| + | Jp1 and Jp2 are to seelct a more or less sensitivity to the inputs.\\ | ||
| + | There indications on board : | ||
| + | Normal settings will be a jumper to pos 5.\\ | ||
| + | If you need a lightly better sensitivity put the jumper on pos 3.\\ | ||
| + | Jp1 is for input 1..4.\\ | ||
| + | Jp2 is for input 5..8.\\ | ||
| + | |||
| + | ===== Files ====== | ||
| + | |{{: | ||
| + | |{{: | ||
| + | |{{: | ||
| + | ^ N.B. Only complete ordered kits will be supported! ^ | ||
| + | |||
| + | \\ | ||
| + | ===== Two ways of connecting railsections ===== | ||
| + | |||
| + | To connect railsections to GCA_PI07 there are two options.\\ | ||
| + | First, the easiest way is NOT to use J2 connector, but instead loop the wire that feeds the rail section through the coil.\\ | ||
| + | Usually just feeding through is sufficient, but with lower currents like waggons with 10K resistor between\\ | ||
| + | the wheels, an extra winding will be needed.\\ | ||
| + | It is never critical to use more windings.\\ | ||
| + | The second option is to use connector J2.\\ | ||
| + | But then you need to make 2 windings of isolated wire on each coil and connect the ends to the free solder pads\\ | ||
| + | on both sides of each coil.\\ | ||
| + | \\ | ||
| + | ===== Testing ===== | ||
| + | GCA_PI07 is using a transformer to detect current.\\ | ||
| + | But like every transformer, | ||
| + | This current can be any digital signal from central units, but also the 50 Hz of a Märklin system.\\ | ||
| + | It will definitely not work with dc powered analog trains.\\ | ||
| + | \\ | ||
| + | |||
| + | =====Links===== | ||
| + | * http:// | ||