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STD DCC Track Occupancy decoder / GBM (Gleis Besetzt Meldung)
License: CC-BY 3.0
Mode: Editors' pick
- 1
Update time：
2024-01-02 15:42:46
Creation time：
2020-06-14 13:19:48
Description
Decoder for the DCC system to detect if tracks are occupied. Detection is performed by measuring voltage over a resistor / (high speed) diode. Feedback to the master station uses the RS-Bus.
Note that there are SMD variants of this board as well.
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | ATMEGA-8535PDIL40WITHSOCKET | IC1 | DIL40WITHSOCKET | 1 |
| 2 | 11.0592 | Q1 | QS | 1 |
| 3 | 18p | C1,C2 | C2.5-2 | 2 |
| 4 | 100NF | C3,C4,C5,C9,C10,C11,C12 | C025-025X050 | 7 |
| 5 | 10microH | L1 | 0309/11 | 1 |
| 6 | 10K | R1,R3 | 0207/10 | 2 |
| 7 | 1k5 | R2 | 0207/10 | 1 |
| 8 | 1N4148 | D1,D2,D3,D4,D5 | DO35-7 | 5 |
| 9 | 6N136 | OK1 | DIL08 | 1 |
| 10 | 470microF / 40V | C7 | E5-10,5 | 1 |
| 11 | 100 microF / 10V | C8 | E2,5-7 | 1 |
| 12 | 7805TV | IC2 | TO220V | 1 |
| 13 | 0,5A | F1 | TE5 | 1 |
| 14 | DIL28 | CON-FEEDBACK | 28P | 1 |
| 15 | MOUNT-HOLE3.5 | H2,H3,H4,H5,H6,H1 | 3,5 | 6 |
| 16 | Taster | S1 | TASTER | 1 |
| 17 | PC817 | OK2 | DIL04 | 1 |
| 18 | BC557 | Q2 | TO92 | 1 |
| 19 | 100 | R4,R7,R9,R11,R14,R16,R18,R20,R22 | 0207/10 | 9 |
| 20 | 1K | R5,R8,R10,R12,R15,R17,R19,R21,R23 | 0207/10 | 9 |
| 21 | 3mm LED | LED1 | LED3MM | 1 |
| 22 | 1K5 | R6 | 0207/10 | 1 |
| 23 | EGP30A | D6,D7,D8,D9,D10,D11,D13,D14,D15,D16,D17,D18,D19,D20,D21,D22 | DO201-15 | 16 |
| 24 | SRP100D | D12 | DO41-10 | 1 |
| 25 | J | PAD1 | 3,81/1,1 | 1 |
| 26 | STL950/2 | X1,X2,X3,X4,X9,X10,X11,X12,X13,X14 | STL(Z)-950-2-V | 10 |
| 27 | STL1550/2 | X5,X6 | STL-1550-2-V | 2 |
| 28 | 16PIN-CON | X7 | PAK100/2500-16 | 1 |
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