2 layers394.1 × 155.1 mm
Keyboard
btb/Telcon-Ambassador
The Telcon Ambassador was a series of portable terminals by Telcon Industries (who later created the Zorba portable computer).
140 parts
2 layers414.3 × 266.7 mm
Telcon Ambassador
btb/Telcon-AmbassadorThe Telcon Ambassador was a series of portable terminals by Telcon Industries (who later created the Zorba portable computer).
- Size
- 414.3 × 266.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 155
- Nets
- 523
- Pads
- 1,505
- Tracks, vias
- 3,660, 281
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 7 Sep 2022
- Updated
- 27 Sep 2024
Overview
Telcon Ambassador is an open-source printed circuit board by btb, from the btb/Telcon-Ambassador repository on GitHub. It is a 2-layer board of 414.3 × 266.7 mm with 155 parts on 523 nets, routed with 3,660 tracks and 281 vias.
It is built around the 74LS241P-E, 74S139DC and 74S138PC, with the 74LS163APC among its other parts. Its parts include 73 ICs, 43 capacitors, 20 resistors, 3 diodes and 3 transistors.
Main components
4
74LS241P-E
-- Interface - Specialized ROHSRenesas ElectronicsInterface - Specialized74S139DC
CDIP-16-55℃~+125℃ 5V CDIP-16 Interface - SpecializedTexas InstrumentsInterface - Specialized
74S138PC
PDIP-160℃~+70℃ 5V PDIP-16 Interface - SpecializedTexas InstrumentsInterface - Specialized74LS163APC
DIP-164 74LS Programmable divide ratio、Reset function、Cascade counter、Synchronous counting DIP-16 Counters, Dividers ROHSTexas InstrumentsCounters, Dividers
README
README.mdTelcon Ambassador Portable Terminals
The Telcon Ambassador was a series of portable terminals by Telcon Industries (who later created the Zorba portable computer).
The info here is primarily derived from my reverse-engineering of a Telcon Ambassador IV which I acquired in very rough shape.
Parts
155| Qty | Value | Footprint | References |
|---|---|---|---|
| 39 | 220nF | ambassador:C_Disc_D4.3mm_W1.9mm_P6.35mm | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C27 +23 |
| 12 | 74163 | Package_DIP:DIP-16_W7.62mm | U15, U16, U17, U30, U31, U32, U35, U36, U37, U46, U55, U57 |
| 7 | 7474 | Package_DIP:DIP-14_W7.62mm | U34, U41, U63, U64, U65, U66, U72 |
| 6 | 220 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R3, R4, R5, R6, R7, R8 |
| 6 | MM2114 | Package_DIP:DIP-18_W7.62mm | U22, U23, U24, U26, U27, U28 |
| 5 | 7404 | Package_DIP:DIP-14_W7.62mm | U12, U43, U51, U75, U76 |
| 4 | 7400 | Package_DIP:DIP-14_W7.62mm | U11, U33, U50, U67 |
| 3 | 2N3904 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3 |
| 3 | 7408 | Package_DIP:DIP-14_W7.62mm | U10, U39, U53 |
| 3 | 74157 | Package_DIP:DIP-16_W7.62mm | U18, U19, U20 |
| 3 | 74175 | Package_DIP:DIP-16_W7.62mm | U58, U59, U68 |
| 3 | 74LS241 | Package_DIP:DIP-20_W7.62mm | U8, U9, U56 |
| 3 | 74S139 | Package_DIP:DIP-16_W7.62mm | U13, U14, U21 |
| 2 | 150 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R13, R15 |
| 2 | 1N4148 | Diode_THT:D_DO-35_SOD27_P7.62mm_Horizontal | D2, D17 |
| 2 | 2716 | Package_DIP:DIP-24_W15.24mm | U5, U6 |
| 2 | 3.3K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R10, R11 |
| 2 | 3.3K | Resistor_THT:R_Array_SIP10 | RN2, RN3 |
| 2 | 4K7 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R16, R18 |
| 2 | 6116 | Package_DIP:DIP-24_W15.24mm | U3, U4 |
| 2 | 680 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R12, R14 |
| 2 | 6821 | Package_DIP:DIP-40_W15.24mm | U70, U71 |
| 2 | 7420 | Package_DIP:DIP-14_W7.62mm | U38, U54 |
| 2 | 74S138 | Package_DIP:DIP-16_W7.62mm | U40, U52 |
| 2 | 75150_2 | Package_DIP:DIP-8_W7.62mm | U73, U79 |
| 2 | 75154 | Package_DIP:DIP-16_W7.62mm | U77, U78 |
| 1 | 10 | Capacitor_THT:CP_Radial_Tantal_D4.5mm_P5.00mm | C23 |
| 1 | 10 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R2 |
| 1 | 100 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R171 |
| 1 | 12.5MHZ | Oscillator:Oscillator_DIP-14 | U44 |
| 1 | 130PF | Capacitor_THT:C_Disc_D11.0mm_W5.0mm_P7.50mm | C25 |
| 1 | 22 | Capacitor_THT:C_Disc_D11.0mm_W5.0mm_P7.50mm | C24 |
| 1 | 2758 | Package_DIP:DIP-24_W15.24mm | U60 |
| 1 | 3.9K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R1 |
| 1 | 47K | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R172 |
| 1 | 5307 | Package_DIP:DIP-14_W7.62mm | U69 |
| 1 | 6810 | Package_DIP:DIP-24_W15.24mm | U47 |
| 1 | 6M2 | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R17 |
| 1 | 7414 | Package_DIP:DIP-14_W7.62mm | U80 |
| 1 | 74166 | Package_DIP:DIP-16_W7.62mm | U61 |
| 1 | 7486 | Package_DIP:DIP-14_W7.62mm | U62 |
| 1 | 74LS163 | Package_DIP:DIP-16_W7.62mm | U45 |
| 1 | 8251 | Package_DIP:DIP-28_W15.24mm | U74 |
| 1 | 921.6KHZ | Crystal:Crystal_HC33-U_Horizontal_1EP_style2 | Y1 |
| 1 | C_Polarized_US | Capacitor_THT:CP_Axial_L18.0mm_D10.0mm_P25.00mm_Horizontal | C26 |
| 1 | Conn_01x04 | Connector_Wire:SolderWire-2sqmm_1x04_P7.8mm_D2mm_OD3.9mm | B1 |
| 1 | Conn_01x05 | ambassador:SolderWire-0.75sqmm_1x05_P6.35mm_D1.25mm_OD2.3mm | A1 |
| 1 | Conn_01x20 | ambassador:SolderWire-0.75sqmm_1x020_P3.96mm_D1.25mm_OD2.3mm | JC1 |
| 1 | Conn_01x21 | ambassador:SolderWire-0.75sqmm_1x021_P3.96mm_D1.25mm_OD2.3mm | D1 |
| 1 | Jumper_2_Bridged | ambassador:SolderWire-0.5sqmm_1x02_P10.16mm_D0.9mm_OD2.1mm | JW1 |
| 1 | Jumper_2_Bridged | ambassador:SolderWire-0.5sqmm_1x02_P12.7mm_D0.9mm_OD2.1mm | JW2 |
| 1 | MC6800 | Package_DIP:DIP-40_W15.24mm | U7 |
| 1 | Presets | Package_DIP:DIP-16_W7.62mm | P1 |
| 1 | R_Network09_Split | Resistor_THT:R_Array_SIP10 | RN4 |
| 1 | R_Network09_US | Resistor_THT:R_Array_SIP10 | RN1 |
| 1 | Speaker | Buzzer_Beeper:Buzzer_15x7.5RM7.6 | LS1 |
| 1 | TestPoint | TestPoint:TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP1 |
| 1 | heatshrink bodge | Resistor_THT:R_Axial_DIN0309_L9.0mm_D3.2mm_P12.70mm_Horizontal | R9 |
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Questions
How big is the Telcon Ambassador PCB?
It measures 414.3 × 266.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Telcon Ambassador use?
155 parts, built around the 74LS241P-E, 74S139DC, 74S138PC and 74LS163APC. 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 Telcon Ambassador KiCad files?
From the btb/Telcon-Ambassador repository on GitHub, at the commit this page was made from: the board is boards/mainboard/mainboard.kicad_pcb and its schematic boards/keyboard/key_matrix.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Telcon Ambassador design in my own project?
Its repository states no licence, so its author keeps all rights: ask btb before reusing the design.