Dragon32Issue2aSecam
About the Dragon32Issue2aSecam PCB
Dragon32Issue2aSecam is an open source PCB design by jimbro1000, published on GitHub under the MIT license. It is a 2-layer board measuring 253 × 199.1 mm, with 206 components from 90 distinct parts.
Other key parts include the M3732H-20RS, MC14053, MC6847, 74LS273N and 74LS86AN. By type, the board carries 77 resistors, 59 capacitors, 34 ICs, 12 diodes, 7 inductors and 1 switch.
From the project
SECAM specific reproduction of the Issue 2 Dragon 32 main board
This repository contains the KiCad project files to reproduce the SECAM variation of the Dragon 32 Issue 2a main board.
This design requires the SECAM power board to operate correctly and will not work with the standard board. See https://github.com/jimbro1000/Dragon32PowerSecam
The board incorporates some factory bodges to simplify assembly efforts.
A front and back ground plane fill has also been added along with effort to make sure that a ground plane is present across most of the board.
Main components on the Dragon32Issue2aSecam
Dragon32Issue2aSecam bill of materials (BOM)
206 components, 90 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | M3732H-20RS | DIP-16_W7.62mm | IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8 |
| 1 | MC14053 | DIP-16_W7.62mm | IC11 |
| 1 | MC6847 | DIP-40_W15.24mm | IC12 |
| 1 | 74LS273N | DIP-20_W7.62mm | IC13 |
| 1 | 74LS86AN | DIP-14_W7.62mm | IC14 |
| 1 | MC6883 | DIP-40_W15.24mm | IC15 |
| 2 | 74LS244N | DIP-20_W7.62mm | IC16, IC24 |
| 2 | 68A364 | DIP-24_W15.24mm | IC17, IC18 |
| 1 | MC6809E | DIP-40_W15.24mm | IC19 |
| 1 | MC14529B | DIP-16_W7.62mm | IC20 |
| 1 | 74LS74 | DIP-14_W7.62mm | IC21 |
| 1 | 74LS00N | DIP-14_W7.62mm | IC22 |
| 1 | 74ALS74N | DIP-14_W7.62mm | IC23 |
| 1 | LM393P | DIP-8_W7.62mm | IC25 |
| 2 | MC6821 | DIP-40_W15.24mm | IC26, IC35 |
| 1 | 74LS20N | DIP-14_W7.62mm | IC27 |
| 2 | 74LS393N | DIP-14_W7.62mm | IC28, IC29 |
| 1 | 74LS32N | DIP-14_W7.62mm | IC30 |
| 1 | 74LS02N | DIP-14_W7.62mm | IC31 |
| 1 | 74LS390 | DIP-16_W7.62mm | IC32 |
Show 70 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS138N | DIP-16_W7.62mm | IC33 |
| 1 | MC14050BCP | DIP-16_W7.62mm | IC34 |
| 1 | MC3346 | DIP-14_W7.62mm | IC44 |
| 1 | 390ns 1K1 | Delay_Line-V9663 | DL1 |
| 1 | LK2 | PinHeader_1x03_P2.54mm_Vertical | LK2 |
| 1 | Dragon Keyboard | PinHeader_1x16_P2.54mm_Vertical | PL1 |
| 1 | Printer | IDC-Header_2x10-1MP_P2.54mm_Latch_Horizontal | PL2 |
| 1 | DIN-6 J/S R | DIN-6_DELTRON_671-0601_Horizontal | PL3 |
| 1 | DIN-5 (180) Cassette | DIN-5_DELTRON_671-0501_45deg_Horizontal | PL4 |
| 1 | DIN-6 J/S L | DIN-6_DELTRON_671-0601_Horizontal | PL5 |
| 1 | Power Board Interconnect | Molex_KK-396_A-41791-0009_1x09_P3.96mm_Vertical | PL6 |
| 1 | EDAC 392-040-558-201 | Edge_2x20_P2.54mm_OvalMP | PL7 |
| 1 | OMRON G2E | OMRON_G2E | RL1 |
| 1 | RESET | Button_AlpsAlpine_SPUN190900 | SW1 |
| 1 | BC141 | TO-92 | TR1 |
| 3 | BC238B | TO-92 | TR2, TR3, TR4 |
| 1 | 10K | Potentiometer_ACP_CA6-H2,5_Horizontal | VR1 |
| 1 | 14.31818MHZ 14.31818MHz | Crystal_HC49-U_Horizontal | XL2 |
| 12 | 1N914 | D_DO-35_SOD27_P12.70mm_Horizontal | D1, D2, D3, D4, D5, D6, D7, D8 +4 |
| 3 | 3.3UH 3.3uH | L_Axial_L7.0mm_D3.3mm_P12.70mm_Horizontal_Fastron_MICC | L1, L2, L99 |
| 1 | 22UH 22uH | L_Axial_L9.5mm_D4.0mm_P15.24mm_Horizontal_Fastron_SMCC | L4 |
| 1 | 3.3UH 3.3uH | L_Axial_L9.5mm_D4.0mm_P15.24mm_Horizontal_Fastron_SMCC | L5 |
| 2 | 10.7MHZ 10.7MHz | TOKO_RCL_10K | L6, L7 |
| 5 | 0.01UF 0.01uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C38, C39, C43, C45 |
| 13 | 0.1UF 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C14, C15, C16, C17, C18, C19, C20 +5 |
| 2 | 4.7UF 4.7uF | CP_Radial_Tantal_D5.5mm_P5.00mm | C11, C37 |
| 3 | 100UF 100uF | CP_Radial_D8.0mm_P5.00mm | C22, C23, C36 |
| 1 | 2.2NF 2.2nF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C26 |
| 5 | 22NF 22nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C30, C31, C32, C33, C44 |
| 2 | 10UF 10uF | CP_Radial_D5.0mm_P2.50mm | C35, C42 |
| 1 | 22PF 22pF | C_Radial_Special | C40 |
| 1 | 33PF 33pF | C_Disc_D3.0mm_W1.6mm_P2.50mm | C41 |
| 2 | 180PF 180pF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C46, C60 |
| 10 | 100PF 100pF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C47, C61, C65, C67, C70, C71, C72, C75 +2 |
| 1 | 22PF 22pF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C48 |
| 5 | 100NF 100nF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C49, C53, C54, C55, C56 |
| 4 | 100NF 100nF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C68, C69, C73, C74 |
| 1 | 10UF 10uF | CP_Radial_D8.0mm_P5.00mm | C78 |
| 2 | 33NF 33nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C97, C98 |
| 1 | 180PF 180pF | C_Disc_D4.7mm_W2.5mm_P5.00mm | C99 |
| 1 | 100R | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R1 |
| 11 | 22R | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R12, R19, R20, R21, R22, R23, R24, R25 +3 |
| 11 | 4K7 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R13, R14, R30, R31, R32, R38, R39, R40 +3 |
| 1 | 33K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R16 |
| 1 | 68K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R29 |
| 1 | 1K8 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R33 |
| 2 | 8K2 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R34, R47 |
| 1 | 12K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R35 |
| 2 | 100K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R36, R64 |
| 1 | 1K5 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R37 |
| 4 | 10K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R42, R43, R55, R56 |
| 1 | 6K8 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R45 |
| 1 | 220R | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R46 |
| 1 | 15K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R48 |
| 2 | 1K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R49, R54 |
| 2 | 56K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R50, R52 |
| 1 | 1M5 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R51 |
| 1 | 10M | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R53 |
| 1 | 20K 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R57 |
| 1 | 80K6 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R58 |
| 1 | 160K 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R59 |
| 1 | 330K 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R60 |
| 1 | 40K2 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R61 |
| 1 | 10K 1% | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R62 |
| 14 | 47K | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R75, R78, R79, R80, R81, R82, R83, R84 +6 |
| 3 | 1200UH 1200uH | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R76, R77, R89 |
| 4 | 6K5 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R91, R92, R93, R100 |
| 2 | 1K6 | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R94, R99 |
| 2 | 470UH 470uH | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R95, R98 |
| 1 | 270R | R_Axial_DIN0309_L9.0mm_D2.5mm_P12.70mm_Horizontal | R97 |
Dragon32Issue2aSecam design files
The KiCad project lives in the jimbro1000/Dragon32Issue2aSecam repository on GitHub; these links point at the commit this page was built from.
Dragon32Issue2aSecam: common questions
How big is the Dragon32Issue2aSecam PCB?
The Dragon32Issue2aSecam measures 253 × 199.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dragon32Issue2aSecam?
206 components, from 90 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Dragon32Issue2aSecam design files?
From the jimbro1000/Dragon32Issue2aSecam repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Dragon32Issue2aSecam design in my own project?
Yes, under the terms of its MIT license, which jimbro1000 chose for the repository.