2 layers132.1 × 45.7 mm
IPoS
peterheinrich/InternetOverSpaghetti
Transmitting IP packages over a pair of spaghetti thus demonstrating how media independent IP really is.
42 parts342
4 layers108.7 × 104.1 mm
RED 80
assoRED/RED_80RED_80 is a super simple Z80 based MicroComputer designed and built by RED
- Size
- 108.7 × 104.1 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 48
- Nets
- 111
- Pads
- 369
- Tracks, vias
- 1,110, 55
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Sep 2018
- Updated
- 30 Sep 2018
Overview
RED 80 is an open-source printed circuit board by assoRED, from the assoRED/RED_80 repository on GitHub. It is a 4-layer board of 108.7 × 104.1 mm with 48 parts on 111 nets, routed with 1,110 tracks and 55 vias.
It is built around the MAX232N and L7805. Its parts include 13 ICs, 12 capacitors, 10 resistors, 4 connectors and 2 switches.
Main components
2
MAX232N
PDIP-160℃~+70℃ 120Kbps 2 2 4.5V~5.5V Transceiver PDIP-16 RS232 ICs ROHSTexas InstrumentsRS232 ICs
L7805
TO-220ST0℃~+125℃@(Tj) 1 1.2A 20V 2V@(1A) 42uV 500uA 5V 73dB@(120Hz) Fixed Positive Short Circuit Protection TO-220ST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSOSENVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdRED_80 computer
Currently work in progress.
Repository content
BOM
- CMOS z80 CPU
- AS6c62256 32k*8bits CMOS low power SRAM
- CMOS 4011 quad NAND logic gate
- CMOS 4071 quad OR logic gate
- CMOS 40106 hex trigger
- 1x tactile switch
- 3x poalized electrolytic 0.01uF capacitor
- 2x ceramic (unpolarized) 22pF capactitor
- Crystal (freq. TBD)
- 1x 10k resistror
- 1x 1M resistor
Memory map
| memory address | Usage |
|---|---|
0x0000 - 0x1FFF | ROM |
0x2000 - 0x3FFF | EXT ROM |
0x8000 - 0xFFFF | RAM |
ROM content
0x0000system reset/init- memroy monitor
Serial interface
System has been designed to be interfaced with a French Minitel 1B made by MATRA communication terminal.
Serial output is slow (by design). Serial interface configuration :
- 4800 baud
- 7bit DATA
- 1bit STOP
- Even parity
- No flow control
To be able to use, you need to setup the minitel in the right comunication mode. Do in order
Fonction+T,AActivate "Péri-Informatique" modeFonction+T,EDeactivate local character echoFonction+P,4Set baudrate to 4800
Minitel interface can be adapted to serial using the assoRED/MinitelInterface circuit
Parts
48| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P2.54mm_Vertical | R4, R8, R9, R10 |
| 4 | 22pF | Capacitor_THT:C_Rect_L4.0mm_W2.5mm_P2.50mm | C4, C5, C9, C10 |
| 2 | 0.01uF | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C1, C2 |
| 2 | 1M | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R2, R5 |
| 2 | 4071 | Package_DIP:DIP-14_W7.62mm_Socket | U4, U8 |
| 2 | 4075 | Package_DIP:DIP-14_W7.62mm_Socket | U12, U13 |
| 2 | C | Capacitor_THT:C_Rect_L4.6mm_W2.0mm_P2.50mm_MKS02_FKP02 | C11, C12 |
| 2 | CP | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C7, C8 |
| 2 | Crystal | Crystal:Crystal_HC18-U_Vertical | Y1, Y2 |
| 2 | R | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R3, R6 |
| 1 | 0.01uf | Capacitor_THT:CP_Radial_D4.0mm_P1.50mm | C3 |
| 1 | 100nf | Capacitor_THT:CP_Radial_D5.0mm_P2.50mm | C6 |
| 1 | 10k | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R1 |
| 1 | 16550 | Package_DIP:DIP-40_W15.24mm_Socket | U10 |
| 1 | 180 | Resistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P5.08mm_Horizontal | R7 |
| 1 | 28C64 | Package_DIP:DIP-28_W15.24mm_Socket | U6 |
| 1 | 28C64 | RED_80_ADDITIONAL:3M-TEXTOOL-ZIF-DIP-28 | U7 |
| 1 | 40106 | Package_DIP:DIP-14_W7.62mm_Socket | U5 |
| 1 | 4011 | Package_DIP:DIP-14_W7.62mm_Socket | U3 |
| 1 | AS6C62256 | Package_DIP:DIP-28_W15.24mm_Socket | U2 |
| 1 | Barrel_Jack | Connector_BarrelJack:BarrelJack_CUI_PJ-063AH_Horizontal | J1 |
| 1 | Conn_01x03_Male | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | Conn_01x29_Male | Connector_PinHeader_2.54mm:PinHeader_1x29_P2.54mm_Vertical | J3 |
| 1 | L7805 | Package_TO_SOT_THT:TO-220-3_Vertical | U9 |
| 1 | LED | LED_THT:LED_D5.0mm | D1 |
| 1 | LOGO | RED_80_ADDITIONAL:RED_LOGO_7_6 | G*** |
| 1 | MAX232 | Package_DIP:DIP-16_W7.62mm_Socket | U11 |
| 1 | RESET_SW | Button_Switch_THT:SW_PUSH_6mm_H4.3mm | SW1 |
| 1 | SW_SPST | Button_Switch_THT:SW_DIP_SPSTx01_Slide_6.7x4.1mm_W7.62mm_P2.54mm_LowProfile | SW2 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Tensility_54-00023_Vertical | J2 |
| 1 | Z80CPU | Package_DIP:DIP-40_W15.24mm_Socket | U1 |
The 45 most common of 48 parts.
Questions
How big is the RED 80 PCB?
It measures 108.7 × 104.1 mm and has 4 copper layers, 1.6 mm thick.
What parts does the RED 80 use?
48 parts, built around the MAX232N and L7805. 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 RED 80 KiCad files?
From the assoRED/RED_80 repository on GitHub, at the commit this page was made from: the board is KiCad/RED_80/RED_80.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the RED 80 design in my own project?
Its repository states no licence, so its author keeps all rights: ask assoRED before reusing the design.
Similar boards
- 2 layers44.9 × 95.6 mm
Bluetoothkiste
julianschick/bluetoothkiste
Bluetooth-Box für Segelflugzeuge zur Kommunikation mit LX und FLARM
62 parts5MIT - 2 layers52.1 × 27.9 mm
MinitelInterface
assoRED/MinitelInterface
Minitel to RS232 converter circuit (based on a MAX232 IC). Can literally be built with random stuff laying around at RED ;-)
13 parts2MIT - 2 layers135.6 × 85.3 mm
- 2 layers120 × 75 mm
- 2 layers315.2 × 190 mm
- 2 layers189.5 × 178 mm
- 4 layers78.3 × 65.8 mm
