2 layers53 × 30 mm
Breadboard Power Supply
DeepSpace00/Breadboard-Power-Supply
Duel power supply for breadboard power rails
28 partsCERN-OHL-P-2.0
2 layers99.1 × 49.9 mm
Comm interface
ezod/rc2014-comm-interface1RC2014 Communication Interface Module
- Size
- 99.1 × 49.9 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 32
- Nets
- 100
- Pads
- 192
- Tracks, vias
- 152, 14
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 25 Jun 2025
- Updated
- 25 Jun 2025
Overview
Comm interface is an open-source printed circuit board by ezod, from the ezod/rc2014-comm-interface repository on GitHub. It is a 2-layer board of 99.1 × 49.9 mm with 32 parts on 100 nets, routed with 152 tracks and 14 vias.
It is built around the MAX232N, CD4053BE and LD1117V33, with the EG2315 among its other parts. Its parts include 10 capacitors, 10 resistors, 4 ICs, 3 connectors and 2 switches. It belongs with the interfaces and adapters and retro computing and games boards and the ESP8266 boards of this library.
Main components
4
MAX232N
PDIP-160℃~+70℃ 120Kbps 2 2 4.5V~5.5V Transceiver PDIP-16 RS232 ICs ROHSTexas InstrumentsRS232 ICsCD4053BE
DIP-16-40℃~+85℃ 0.2pF 2:1 3 3V~15V 7ns 90Ω Bidirectional analog channel、Level shifting、Glitch-free switching DIP-16 Analog Switches, Multiplexers ROHSHGSEMIAnalog Switches, Multiplexers
LD1117V33
TO-2200℃~+125℃@(Tj) 1 1.2V@(800mA) 100uV 15V 3.3V 5mA 75dB@(120Hz) 800mA Fixed Over Current Protection、Thermal Shutdown Positive TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSSTMicroelectronicsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
EG2315
插件-20℃~+70℃ 30V DP3T PC Pin Rectangular Columnar Through Hole 插件 Slide Switches ROHSE-SwitchSlide Switches
README
README.mdRC2014 Communication Interface Module
This is a serial communication module for RC2014 computers providing an easy way to switch dual serial port connections between RS232, FTDI, and an ESP01 module.
| Switch Position | Port A | Port B |
|---|---|---|
| left | FTDI | ESP01 |
| middle | RS232 | ESP01 |
| right | RS232 | FTDI |
These configuration options allow you to switch between a PC and a serial terminal as the main console, connect either to an ESP01 modem using Zimodem or similar, and do XMODEM transfers over FTDI from a serial terminal.
Bill of Materials
| Reference | Part |
|---|---|
| U1 | LD1117V33 |
| U2 | MAX232N |
| U3-U4 | CD4053B |
| R1-R6 | 1K resistor |
| R7 | 3.3K resistor |
| R8 | 4.7K resistor |
| R9-R10 | 10K resistor |
| C1-C4 | 1uF electrolytic capacitor |
| C5-C6 | 10uF electrolytic capacitor |
| C7 | 47uF electrolytic capacitor |
| C8-C10 | 0.1uF disc/MLCC capacitor |
| S1 | EG2315 DP3T slide switch |
| S2 | right angle tactile switch |
| J1 | 1x6 0.1" right angle pin header |
| J2 | DE9 female socket |
| J3 | 2x8 0.1" straight pin socket |
| JP1 | 1x2 0.1" straight pin header |
| BUS | 2x40 0.1" right angle pin header |
For the DE9 socket (J2), use NorComp 182-009-213R561 or similar.
This module optionally connects RTS signals to the RS232 and FTDI connectors. If you are using the Dual Serial Module SIO/2, to use the RTS signals, you will need to bodge pin 17 (RTSA) of U3 to pin 37 (SPARE1) of the bus, and pin 24 (RTSB) of U3 to pin 38 (SPARE2) of the bus. Otherwise, you can leave R5 and R6 unpopulated.
Parts
32| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3, R4, R5, R6 |
| 4 | 1u | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C1, C2, C3, C4 |
| 3 | C | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C8, C9, C10 |
| 2 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R9, R10 |
| 2 | 10u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C5, C6 |
| 2 | CD4053B | Package_DIP:DIP-16_W7.62mm_Socket | U3, U4 |
| 1 | 3.3K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7 |
| 1 | 4.7K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | 47u | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C7 |
| 1 | 5V | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | Conn_01x20 | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | BUS1 |
| 1 | Conn_01x39 | Connector_PinHeader_2.54mm:PinHeader_1x39_P2.54mm_Vertical | BUS2 |
| 1 | DE9 | Connector_Dsub:DSUB-9_Female_Horizontal_P2.77x2.84mm_EdgePinOffset7.70mm_Housed_MountingHolesOffset9.12mm | J1 |
| 1 | EG2315 | EG2315:EG2315 | S1 |
| 1 | ESP01 | Connector_PinSocket_2.54mm:PinSocket_2x04_P2.54mm_Vertical | J3 |
| 1 | FTDI | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J2 |
| 1 | LD1117V33 | Package_TO_SOT_THT:TO-220-3_Horizontal_TabDown | U1 |
| 1 | MAX232 | Package_DIP:DIP-16_W7.62mm_Socket | U2 |
| 1 | SW_Push | Button_Switch_THT:SW_Tactile_SPST_Angled_PTS645Vx39-2LFS | S2 |
Questions
How big is the Comm interface PCB?
It measures 99.1 × 49.9 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Comm interface use?
32 parts, built around the MAX232N, CD4053BE, LD1117V33 and EG2315. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Comm interface KiCad files?
From the ezod/rc2014-comm-interface repository on GitHub, at the commit this page was made from: the board is comm-interface.kicad_pcb and its schematic comm-interface.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Comm interface design in my own project?
Its repository states no licence, so its author keeps all rights: ask ezod before reusing the design.
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