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STD TMC 24 Channel IO Decoder
TMC 24 Channel IO Decoder
License
GPL 3.0
License: GPL 3.0- 0
Update time：
2024-11-08 20:29:07
Creation time：
2024-01-26 20:19:23
Description
Description
Arduino code for the 24 Channel (SUBD-25 connector) I/O Decoder for DCC Accessory Commands and RS-Bus Feedback. This decoder was developed for the Twentse Modelspoorweg Club (TMC).
The 24 digital IO channels are devided into three ports of 8 bits. Using the DIP switches, each port can be used as input or as output. Input ports listen to DCC Accessory (switch) commands. Feedback is provided via the RS-Bus.
The design is based on a AVR64DA64 processor; this processor can be ordered (at JLCPCB) as Global Sourcing Part.
The PCB is designed for the Twentse Modelspoorweg Club (TMC), but may be used by others as well.
Software and further documentation can be found on https://github.com/aikopras/TMC-24-Channel-IO-Decoder
Design Drawing
Design Drawing
schematic diagram
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AVR64DA64
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RS-Bus interface
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DCC
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Connector
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Power
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PCB
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| ID | Name | Designator | Footprint | Quantity | |
|---|---|---|---|---|---|
| 1 | 1K | R47 | R0603 | 1 | C21190 |
| 2 | 100 | R51,R52 | R0603 | 2 | C22775 |
| 3 | 33 | R53 | R0603 | 1 | C23140 |
| 4 | 220 | R55 | R0603 | 1 | C22962 |
| 5 | L78M05ABDT-TR | U4 | TO-252-2_L6.5-W6.1-P4.58-LS10.0-TL | 1 | C58069 |
| 6 | EL357 | OK42 | SOP-4_L3.9-W4.4-P2.54-LS7.0-TL | 1 | C29981 |
| 7 | AVR64DA64 | U1 | TQFP-64_L10.0-W10.0-P0.50-LS12.0-BL | 1 | C3228496 |
| 8 | White | LED-TEST | LED0603-R-RD_WHITE | 1 | C2290 |
| 9 | Power In | CON60 | CONN-TH_2P-P5.08_WJ2EDGRC-5.08-2P | 1 | C3697 |
| 10 | 2510S-3P | MONITOR1 | CONN-TH_2510S-3P | 1 | C132505 |
| 11 | Red | LED-DEC | LED0603-RD | 1 | C2286 |
| 12 | 600Ω | L1 | L0805 | 1 | C1017 |
| 13 | 100nF | C41,C50 | C0402_NEW | 2 | C1525 |
| 14 | 1N4148 | D40,D52 | SOD-323_L1.8-W1.3-LS2.5-RD | 2 | C2128 |
| 15 | 5V6 | D51 | SOD-123_L2.8-W1.8-LS3.7-RD | 1 | C173406 |
| 16 | 6N137 | OK41 | SMD-8_L9.8-W6.6-P2.54-LS10.3-BL | 1 | C110020 |
| 17 | 4N35 | OK51 | DIP-6_L8.5-W6.4-P2.54-LS7.6-BL | 1 | C57084 |
| 18 | EL357N(C) | OK52 | SOP-4_L3.9-W4.4-P2.54-LS7.0-TL | 1 | C29981 |
| 19 | 1.5K | R40,R41,R42,R43 | R0805 | 4 | C4310 |
| 20 | 10kΩ | R44,R45 | R0402 | 2 | C25744 |
| 21 | 100 | R46 | R0805 | 1 | C17408 |
| 22 | 470Ω | R49 | R0402 | 1 | C25117 |
| 23 | 22K | R54 | R0402 | 1 | C25768 |
| 24 | Taster | S1 | TASTER | 1 | |
| 25 | MMBT5401 | T41,T51 | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | 2 | C8326 |
| 26 | MMBT5551 | T52,T53,T54 | SOT-23-3_L2.9-W1.3-P1.90-LS2.4-BR | 3 | C2145 |
| 27 | DSWB03LHGET | IO1 | SW-TH_DSWB03LHGET | 1 | C99420 |
| 28 | 470uF | C60 | CAP-TH_BD10.0-P5.00-D1.0-FD | 1 | C59355 |
| 29 | 10uF/50V | C61 | C1206 | 1 | C13585 |
| 30 | 100nF | C62 | C0603 | 1 | C14663 |
| 31 | 100nF | C63,C65,C66,C67,C68 | C0402 | 5 | C1525 |
| 32 | 10uF | C64 | CAP-SMD_L3.2-W1.6-R-RD | 1 | C7171 |
| 33 | DCC | CON40 | CONN-TH_2P-P5.08_WJ2EDGRC-5.08-2P | 1 | C3697 |
| 34 | RS-Bus | CON50 | CONN-TH_2P-P3.50_WJ15EDGRC-3.5-2P | 1 | C2924837 |
| 35 | 4007 | D60,D61,D62,D63 | SOD-123F_L2.8-W1.8-LS3.7-RD | 4 | C64898 |
| 36 | 4.7kΩ | R60,R2,R3,R4,R5,R6 | R0603 | 6 | C23162 |
| 37 | MB10S_C2488 | D41 | DIO-BG-SMD_4P-L4.9-W4.0-P2.54-LS7.0-TL | 1 | C2488 |
| 38 | 1.5kΩ | R48,R56 | R0402 | 2 | C25867 |
| 39 | SUBD25-Female | DSUB1 | DSUB-TH_DS1037-25FNAKT74-0CC | 1 | C77838 |
| 40 | Yellow | LED-FB,LED-RS,LED-ACC,LED-DCC | LED0603-RD-YELLOW | 4 | C72038 |
| 41 | Green | POWERLED | LED0805-R-RD | 1 | C2297 |
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