

Schemat
- Size
- 100 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 93
- Nets
- 109
- Pads
- 322
- Tracks, vias
- 424, 3
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 28 Nov 2024
- Updated
- 19 Dec 2024
Overview
Schemat is an open-source printed circuit board by thefoolGame, from the thefoolGame/revolwer repository on GitHub. It is a 2-layer board of 100 × 100 mm with 93 parts on 109 nets, routed with 424 tracks and 3 vias.
It is built around the NE555P, 74LS390FP-E and 74HC86D, with the 74LS32SC and BC547 among its other parts. Its parts include 34 resistors, 14 ICs, 9 capacitors, 5 transistors and 3 diodes.
Main components
5NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters74LS390FP-E
SOP-16-20℃~+75℃ 2 20MHz、25MHz 4 4.75V~5.25V 400mW 74LS BCD Counter Programmable divide ratio SOP-16 Counters, Dividers ROHSRenesas ElectronicsCounters, Dividers74HC86D
SO-14-40℃~+125℃ 1.5V~4.2V 20ns@6V,50pF 2V~6V 2uA 4 5.2mA 5.2mA 500mV~1.8V 74HC Series XOR Gate SOIC-14 Logic Gates ROHSNexperiaLogic Gates74LS32SC
-- Logic Gates ROHSTexas InstrumentsLogic GatesBC547
TO-92Bipolar (BJT)Jiangsu Changjing Electronics Technology (CJ)
Parts
93| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R18, R19, R20, R21, R22, R23, R24, R25, R26, R27, R28, R29, R30, R31, R32, R33 +1 |
| 7 | 10n | Capacitor_THT:C_Disc_D3.4mm_W2.1mm_P2.50mm | C1, C2, C3, C4, C5, C6, C8 |
| 4 | BC547 | Package_TO_SOT_THT:TO-92 | Q1, Q2, Q3, Q4 |
| 3 | 10k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R2, R3 |
| 3 | 4011 | Package_DIP:DIP-14_W7.62mm | U4, U7, U16 |
| 3 | LED | LED_THT:LED_D4.0mm | D1, D2, D3 |
| 3 | NE555P | Package_DIP:DIP-8_W7.62mm | U1, U3, U5 |
| 2 | 18k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R7, R9 |
| 2 | 22k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R13, R14 |
| 2 | 4511 | Package_DIP:DIP-16_W7.62mm | U11, U12 |
| 2 | 4k7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R4, R5 |
| 2 | 74LS390 | Package_DIP:DIP-16_W7.62mm | U2, U10 |
| 2 | D148K | Display_7Segment:7SegmentLED_LTS6760_LTS6780 | U13, U14 |
| 2 | LOGO | LOGO | G***, G*** |
| 1 | 100Hz TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP13 |
| 1 | 100n | Capacitor_THT:C_Disc_D6.0mm_W2.5mm_P5.00mm | C9 |
| 1 | 100u | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C7 |
| 1 | 10kHz TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP2 |
| 1 | 180k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R12 |
| 1 | 2k7 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 1 | 390k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R10 |
| 1 | 44k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16 |
| 1 | 47k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11 |
| 1 | 50k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R17 |
| 1 | 5V TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP1 |
| 1 | 680k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R6 |
| 1 | 74HC86 | Package_DIP:DIP-14_W7.62mm | U6 |
| 1 | 74LS32 | Package_DIP:DIP-14_W7.62mm | U8 |
| 1 | 82k | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R8 |
| 1 | BlockPlayer1 TS | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP10 |
| 1 | BlockPlayer2 TS | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP11 |
| 1 | GND TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP21 |
| 1 | Light Test Bridge | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | NMOS | Package_TO_SOT_THT:TO-220-3_Vertical | Q5 |
| 1 | NegatedTimerErnable TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP4 |
| 1 | Player 1 | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW1 |
| 1 | Player 2 | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW2 |
| 1 | Power Pins | Connector_Molex:Molex_KK-254_AE-6410-02A_1x02_P2.54mm_Vertical | J2 |
| 1 | RandomizerQ0 TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP8 |
| 1 | RandomizerQ1 TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP7 |
| 1 | RandomizerQ2 TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP6 |
| 1 | RandomizerQ3 TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP5 |
| 1 | RandomizerResistance TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP9 |
| 1 | ResetSignal TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP15 |
| 1 | SW_Push | Button_Switch_THT:SW_PUSH_6mm_H5mm | SW3 |
| 1 | StartPulse TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP3 |
| 1 | StartSignal TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP18 |
| 1 | TimerReset TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP14 |
| 1 | User1Signal TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP16 |
| 1 | User1Victory TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP20 |
| 1 | User2Signal TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP17 |
| 1 | User2Victory TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP19 |
| 1 | UserVictory TP | Connector_PinHeader_2.54mm:PinHeader_1x01_P2.54mm_Vertical | TP12 |
Questions
How big is the Schemat PCB?
It measures 100 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Schemat use?
93 parts, built around the NE555P, 74LS390FP-E, 74HC86D and 74LS32SC. 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 Schemat KiCad files?
From the thefoolGame/revolwer repository on GitHub, at the commit this page was made from: the board is schemat1/schemat.kicad_pcb and its schematic schemat/10_ms_timer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Schemat design in my own project?
Its repository states no licence, so its author keeps all rights: ask thefoolGame before reusing the design.
Similar boards
- 2 layers630 × 300 mm

- 2 layers137 × 101.1 mm

Z80 board1
alexfreed58/z80-CPM-board-with-smart-i-o
This is yet another retro computer running CPM on an actual Z80 CPU with a twist. Instead of using a traditional UART for communications, it uses a RPi pico module that is no bigger and no more expensive than a UART.
48 parts2MIT - 2 layers160.5 × 100.2 mm

8080 Board
sladek/SBC_8080_ECB
This is my attempt to build a single-board microcomputer based on the Intel 8080 CPU. It contains the following features:
112 parts - 2 layers253 × 169.1 mm

- 2 layers120.2 × 78.9 mm

- 2 layers81.8 × 47.6 mm

- 2 layers253 × 199.1 mm

Dragon32Issue2aSecam
jimbro1000/Dragon32Issue2aSecam
SECAM specific reproduction of the Issue 2 Dragon 32 main board
206 partsMIT - 2 layers124.5 × 132.1 mm

Interface osi
osiweb/unified_retro_keyboard
Project to provide keyboard replacements for various classic computers, as well as classic ASCII keyboard
80 parts122