Radio-86rk
About the Radio-86rk PCB
Radio-86rk is an open source PCB design by skiselev, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 266.7 × 203.2 mm, with 190 components from 127 distinct parts.
Other key parts include the 8080A/КР580ВМ80А, 8224/КР580ГФ24, 8251A/КР580ВВ51А, 8253/КР580ВИ53 and 8255A/КР580ВВ55А. By type, the board carries 68 switches, 44 capacitors, 27 ICs, 19 resistors, 11 diodes and 7 connectors.
It belongs with the rf & radio designs in this gallery.
From the project
Re-make of the Soviet Ham Radio computer published in Radio Magazine in 1986
The goal of the original design was to create a computer that can be built relatively easily and cheaply using commonly available components. Therefore it included several short-cuts. For example it didn't use 8228 bus controller. Instead, it uses /WR and DBIN CPU signals instead to distinguish between write and read CPU cycles. Since the system doesn't decode I/O control signals, all the I/O devices are memory mapped. Another optimization is the use of DMA controller for both supplying the data to the CRT controller and for refreshing DRAMs. The system didn't support interrupts. The sound…
Main components on the Radio-86rk
Radio-86rk bill of materials (BOM)
190 components, 127 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 8080A/КР580ВМ80А | IC_DIP40_600 | U1 |
| 1 | 8224/КР580ГФ24 | IC_DIP16_300 | U2 |
| 1 | 8251A/КР580ВВ51А | IC_DIP28_600 | U3 |
| 1 | 8253/КР580ВИ53 | IC_DIP24_600 | U4 |
| 2 | 8255A/КР580ВВ55А | IC_DIP40_600 | U5, U6 |
| 1 | 8257/КР580ВТ57 | IC_DIP40_600 | U7 |
| 1 | 8275/КР580ВГ75 | IC_DIP40_600 | U8 |
| 1 | AS6C62256 | IC_DIP28_600 | U9 |
| 2 | 2764/К573РФ6/28C64 | IC_DIP28_600 | U10, U11 |
| 1 | 74LS373/К555ИР22 | IC_DIP20_300 | U12 |
| 1 | 74198/К155ИР13 | IC_DIP24_600 | U13 |
| 1 | 74LS138/К555ИД7 | IC_DIP16_300 | U14 |
| 1 | 7492/К155ИЕ4 | IC_DIP14_300 | U15 |
| 1 | 7486/К155ЛП5 | IC_DIP14_300 | U16 |
| 1 | 7474/К155ТМ2 | IC_DIP14_300 | U17 |
| 1 | 7408/К155ЛИ1 | IC_DIP14_300 | U18 |
| 1 | 7404/К155ЛН1 | IC_DIP14_300 | U19 |
| 1 | 7400/К155ЛА3 | IC_DIP14_300 | U20 |
| 1 | TL071/КР140УД608 | IC_DIP8_300 | U21 |
| 1 | SN75154N/К170УП2В | IC_DIP16_300 | U22 |
Show 107 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | SN75150P/К170АП2 | IC_DIP8_300 | U23, U24 |
| 1 | LM7905/КР1179ЕН5В | IC_TO220-3_Vert | U25 |
| 1 | IZ0512S | DC-DC_SIP8 | U26 |
| 1 | DS1233 | Transistor_TO92_EBC_254 | U27 |
| 2 | 2N3904 | Transistor_TO92_EBC_254 | Q1, Q2 |
| 1 | 16MHz | Crystal_HC-49U_Vert | Y1 |
| 1 | Video | Conn_RCA_Right | J1 |
| 1 | 5V | Conn_Power_Jack_Circular_Pads | J2 |
| 1 | Power | Conn_Friction_Lock_8P_2.54mm | J3 |
| 1 | Cassette | Conn_DIN_8pin | J4 |
| 1 | Serial | Conn_Dsub_DE9M | J5 |
| 1 | Parallel | Conn_Pin_Header_13x2_2.54mm_Shrouded | J6 |
| 1 | Extension | Conn_Pin_Header_20x1_2.54mm | J7 |
| 1 | 1.1A | Cap_Cer_508 | F1 |
| 7 | M3 | Hole_3mm | HOLE1, HOLE2, HOLE3, HOLE4, HOLE5, HOLE6, HOLE7 |
| 1 | U10 EPROM Type | Conn_Pin_Header_4x1_2.54mm | JP1 |
| 1 | U11 EPROM Type | Conn_Pin_Header_4x1_2.54mm | JP2 |
| 1 | SPEAKER | Speaker_12mm | SP1 |
| 1 | FF | CHERRY_PCB_100H | SW1 |
| 1 | CLS СТР | CHERRY_PCB_100H | SW2 |
| 1 | ESC АР2 | CHERRY_PCB_100H | SW3 |
| 1 | F1 | CHERRY_PCB_100H | SW4 |
| 1 | F2 | CHERRY_PCB_100H | SW5 |
| 1 | F3 | CHERRY_PCB_100H | SW6 |
| 1 | F4 | CHERRY_PCB_100H | SW7 |
| 1 | F5 | CHERRY_PCB_100H | SW8 |
| 1 | TAB ТАБ | CHERRY_PCB_100H | SW9 |
| 1 | LF ПС | CHERRY_PCB_100H | SW10 |
| 1 | CR ВК | CHERRY_PCB_225H | SW11 |
| 1 | DEL ЗБ | CHERRY_PCB_100H | SW12 |
| 1 | LEFT | CHERRY_PCB_100H | SW13 |
| 1 | UP | CHERRY_PCB_100H | SW14 |
| 1 | RIGHT | CHERRY_PCB_100H | SW15 |
| 1 | DOWN | CHERRY_PCB_100H | SW16 |
| 1 | 0 | CHERRY_PCB_100H | SW17 |
| 1 | 1 ! | CHERRY_PCB_100H | SW18 |
| 1 | 2 " | CHERRY_PCB_100H | SW19 |
| 1 | 3 # | CHERRY_PCB_100H | SW20 |
| 1 | 4 $ | CHERRY_PCB_100H | SW21 |
| 1 | 5 % | CHERRY_PCB_100H | SW22 |
| 1 | 6 & | CHERRY_PCB_100H | SW23 |
| 1 | 7 ' | CHERRY_PCB_100H | SW24 |
| 1 | 8 ( | CHERRY_PCB_100H | SW25 |
| 1 | 9 ) | CHERRY_PCB_100H | SW26 |
| 1 | : * | CHERRY_PCB_100H | SW27 |
| 1 | ; + | CHERRY_PCB_100H | SW28 |
| 1 | , < | CHERRY_PCB_100H | SW29 |
| 1 | - = | CHERRY_PCB_100H | SW30 |
| 1 | . > | CHERRY_PCB_100H | SW31 |
| 1 | / ? | CHERRY_PCB_100H | SW32 |
| 1 | @ Ю | CHERRY_PCB_100H | SW33 |
| 1 | A А | CHERRY_PCB_100H | SW34 |
| 1 | B Б | CHERRY_PCB_100H | SW35 |
| 1 | C Ц | CHERRY_PCB_100H | SW36 |
| 1 | D Д | CHERRY_PCB_100H | SW37 |
| 1 | E Е | CHERRY_PCB_100H | SW38 |
| 1 | F Ф | CHERRY_PCB_100H | SW39 |
| 1 | G Г | CHERRY_PCB_100H | SW40 |
| 1 | H Х | CHERRY_PCB_100H | SW41 |
| 1 | I И | CHERRY_PCB_100H | SW42 |
| 1 | J Й | CHERRY_PCB_100H | SW43 |
| 1 | K К | CHERRY_PCB_100H | SW44 |
| 1 | L Л | CHERRY_PCB_100H | SW45 |
| 1 | M М | CHERRY_PCB_100H | SW46 |
| 1 | N Н | CHERRY_PCB_100H | SW47 |
| 1 | O О | CHERRY_PCB_100H | SW48 |
| 1 | P П | CHERRY_PCB_100H | SW49 |
| 1 | Q Я | CHERRY_PCB_100H | SW50 |
| 1 | R Р | CHERRY_PCB_100H | SW51 |
| 1 | S С | CHERRY_PCB_100H | SW52 |
| 1 | T Т | CHERRY_PCB_100H | SW53 |
| 1 | U У | CHERRY_PCB_100H | SW54 |
| 1 | V Ж | CHERRY_PCB_100H | SW55 |
| 1 | W В | CHERRY_PCB_100H | SW56 |
| 1 | X Ь | CHERRY_PCB_100H | SW57 |
| 1 | Y Ы | CHERRY_PCB_100H | SW58 |
| 1 | Z З | CHERRY_PCB_100H | SW59 |
| 1 | [ Ш | CHERRY_PCB_100H | SW60 |
| 1 | \ Э | CHERRY_PCB_150H | SW61 |
| 1 | ] Щ | CHERRY_PCB_100H | SW62 |
| 1 | ^ Ч | CHERRY_PCB_100H | SW63 |
| 1 | SPACE | CHERRY_PCB_625H | SW64 |
| 1 | CTRL УС | CHERRY_PCB_125H | SW65 |
| 1 | SHIFT CC | CHERRY_PCB_125H | SW66 |
| 1 | RUS/LAT | CHERRY_PCB_100H | SW67 |
| 1 | Reset | Switch_Tactile_6mm_Right | SW68 |
| 9 | 1N4148 | Diode_762 | D1, D2, D3, D4, D5, D6, D7, D8 +1 |
| 1 | POWER | LED_3mm | D10 |
| 1 | RUS/LAT | LED_3mm | D11 |
| 32 | 0.1uF | Cap_Cer_508 | C1, C2, C3, C4, C5, C6, C7, C8 +24 |
| 6 | 47uF | Cap_Elec_Radial_6.3mm | C33, C34, C35, C36, C37, C38 |
| 1 | 0.22uF | Cap_Cer_508 | C39 |
| 1 | 22nF | Cap_Cer_508 | C40 |
| 1 | 10nF | Cap_Cer_508 | C41 |
| 1 | 2.2nF | Cap_Cer_508 | C42 |
| 1 | 1nF | Cap_Cer_508 | C43 |
| 1 | 10pF | Cap_Cer_508 | C44 |
| 1 | 33 | Res_762 | R1 |
| 1 | 75 | Res_762 | R2 |
| 1 | 150 | Res_762 | R3 |
| 1 | 330 | Res_762 | R4 |
| 1 | 1.5k | Res_762 | R5 |
| 8 | 1k | Res_762 | R6, R7, R8, R9, R10, R11, R12, R13 |
| 1 | 2.4k | Res_762 | R14 |
| 1 | 12k | Res_762 | R15 |
| 1 | 10k | Conn_SIL10 | RN1 |
| 3 | 4.7k | Conn_SIL6 | RN2, RN3, RN4 |
Radio-86rk design files
The KiCad project lives in the skiselev/radio-86rk repository on GitHub; these links point at the commit this page was built from.
- LayoutKiCad/Radio-86RK.kicad_pcb
- SchematicKiCad/Radio-86RK.kicad_sch
Radio-86rk: common questions
How big is the Radio-86rk PCB?
The Radio-86rk measures 266.7 × 203.2 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Radio-86rk?
190 components, from 127 distinct parts. The full bill of materials is listed on this page.
Where can I download the Radio-86rk design files?
From the skiselev/radio-86rk repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Radio-86rk design in my own project?
Yes, under the terms of its GPL-3.0 license, which skiselev chose for the repository.
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