2 layers121.4 × 130.3 mm
2 layers75.5 × 56.1 mm
Serial
dimitrit/pal1serial1A serial interface expansion board for the PAL-1 system based on the Motorola MC6850 Asynchronous Communications Interface Adapter
- Size
- 75.5 × 56.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 43
- Nets
- 101
- Pads
- 248
- Tracks, vias
- 782, 5
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 13 Oct 2022
- Updated
- 21 Oct 2023
Overview
Serial is an open-source printed circuit board by dimitrit, from the dimitrit/pal1serial repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 75.5 × 56.1 mm with 43 parts on 101 nets, routed with 782 tracks and 5 vias.
It is built around the MAX232N, 74LS02PC and 74LS04PC, with the 74LS30PC and CD4060BE among its other parts. Its parts include 13 capacitors, 7 resistors, 7 ICs, 6 diodes and 3 connectors. It belongs with the interfaces and adapters boards of this library.
Main components
5
MAX232N
PDIP-160℃~+70℃ 120Kbps 2 2 4.5V~5.5V Transceiver PDIP-16 RS232 ICs ROHSTexas InstrumentsRS232 ICs
74LS02PC
DIP-140℃~+70℃ 15ns@5V,15pF 2 2.7V 2V 4 4.75V~5.25V 400uA 500mV 74LS 800mV 8mA 8mA NOR Gate DIP-14 Logic Gates ROHSonsemiLogic Gates74LS04PC
PDIP-140℃~+70℃ 4.75V~5.25V 6 6.6mA 74LS PDIP-14 InvertersonsemiInverters74LS30PC
PDIP-140℃~+70℃ 1 1.1mA 18ns@5V,50pF、20ns@5V,50pF 2.7V 2V 4.75V~5.25V 400uA 500mV 74LS Series 8 800mV 8mA NAND Gate PDIP-14 Logic GatesTexas InstrumentsLogic GatesCD4060BE
DIP-16-40℃~+85℃ 100ns 12MHz 14 2V~20V Asynchronous Asynchronous Binary Counter Falling Edge Reset function DIP-16 Counters, Dividers ROHSHGSEMICounters, Dividers
README
readme.mdPAL-1 Serial Interface Adapter
The PAL-1 Serial Interface Adapter is an expansion module for the PAL-1 system1 based on the Motorola MC6850 Asynchronous Communications Interface Adapter (ACIA)2. The design was inspired by a homebrew project in CPC Schneider International magazine3.
Acknowledgements
PAL-1 and the PAL-1 logo used with kind permission of Liu Ganning.
References
- Liu Ganning, ‘PAL-1 Microcomputer User Manual’, 2020 http://pal.aibs.ws/assets/PAL_en.pdf [accessed 21 July 2022].
- Motorola Semiconductors, ‘MC6850, Asynchronous Communications Interface Adapter (ACIA)’ (Motorola Semiconductors, 1994).
- Joachim Schweda, ‘Schnittstelle RS-232 im Selbstbau’, CPC Schneider International, 7.3 (1986), 88-92.
Parts
43| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C1, C2, C3, C4, C5, C6, C7 |
| 6 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D4, D5, D6 |
| 5 | 2K2 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R4, R5, R6, R7 |
| 4 | 1.0uF | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C8, C9, C10, C11 |
| 2 | 33pF | Capacitor_THT:C_Disc_D3.0mm_W1.6mm_P2.50mm | C12, C13 |
| 2 | Jumper_2_Open | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP3, JP4 |
| 1 | 10K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R2 |
| 1 | 4.0Mhz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 74LS02 | Package_DIP:DIP-14_W7.62mm | U5 |
| 1 | 74LS04 | Package_DIP:DIP-14_W7.62mm | U6 |
| 1 | 74LS08 | Package_DIP:DIP-14_W7.62mm | U4 |
| 1 | 74LS30 | Package_DIP:DIP-14_W7.62mm | U3 |
| 1 | CD4060BE | Package_DIP:DIP-16_W7.62mm | U2 |
| 1 | Conn_01x06_Male | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Horizontal | J2 |
| 1 | Conn_02x09_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x09_P2.54mm_Vertical | JP2 |
| 1 | Conn_02x20_Odd_Even | Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical | J1 |
| 1 | DB9_Male | Connector_Dsub:DSUB-9_Male_Horizontal_P2.77x2.84mm_EdgePinOffset7.70mm_Housed_MountingHolesOffset9.12mm | J3 |
| 1 | LOGO | PAL-1:logo_eb | G*** |
| 1 | LOGO | LOGO | G*** |
| 1 | MAX232 | Package_DIP:DIP-16_W7.62mm | U7 |
| 1 | MC6850 | Package_DIP:DIP-24_W15.24mm | U1 |
| 1 | addr select | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | ~ | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
Questions
How big is the Serial PCB?
It measures 75.5 × 56.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Serial use?
43 parts, built around the MAX232N, 74LS02PC, 74LS04PC and 74LS30PC. 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 Serial KiCad files?
From the dimitrit/pal1serial repository on GitHub, at the commit this page was made from: the board is serial/serial.kicad_pcb and its schematic serial/serial.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Serial design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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