2 layers407 × 184 mm
TRS-80-Model I G E1
RetroStack/TRS-80-Model-I-G-E1
Hardware Replica of the TRS-80 Model I Revision G
230 parts57MIT
4 layers64 × 24 mm
Debugger
QSmally/Schematics-Debugger1Schematics of a Clock Generator
- Size
- 64 × 24 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 36
- Nets
- 28
- Pads
- 109
- Tracks, vias
- 239, 29
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 21 Apr 2026
- Updated
- 30 Jun 2026
Overview
Debugger is an open-source printed circuit board by QSmally, from the QSmally/Schematics-Debugger repository on GitHub. It is a 4-layer board of 64 × 24 mm with 36 parts on 28 nets, routed with 239 tracks and 29 vias.
It is built around the 74LS132P-E, 74LS74PC and NE555P, with the BC546 among its other parts. Its parts include 11 resistors, 6 capacitors, 4 diodes, 4 connectors and 3 ICs. It belongs with the interfaces and adapters boards of this library.
Main components
4
74LS132P-E
DIP-14-20℃~+75℃ 2 2.7V 22ns@5V,15pF 4 4.75V~5.25V 400uA 500mV 74LS 8mA NAND Gate Schmitt trigger DIP-14 Logic Gates ROHSRenesas ElectronicsLogic Gates74LS74PC
DIP-140ns 0℃~+70℃ 1 2 20MHz 3.5pF 35ns@5V,50pF 4.5ns 4.75V~5.25V 400uA 74LS Series 8mA 8mA Asynchronous Complementary D-Type Rising Edge Set and Reset DIP-14 Flip FlopsTexas InstrumentsFlip Flops
NE555P
DIP-80℃~+70℃ 100kHz 10mA 4.5V~16V DIP-8 555 Timers / Counters ROHSTexas InstrumentsTimers / Counters
BC546
TO-921 NPN 100mA 100nA 300MHz 500mW 65V 6V 800 90mV、250mV NPN TO-92 Bipolar (BJT) ROHSDDFBipolar (BJT)
Parts
36| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 1k | Resistor_SMD:R_0603_1608Metric | R1, R3, R6, R8, R9, R10 |
| 4 | 0.1 uF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C5, C6 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad | H1, H2, H3, H4 |
| 3 | 10k | Resistor_SMD:R_0603_1608Metric | R2, R7, R11 |
| 3 | LED Green | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 3 | male | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J2, J3, J4 |
| 1 | 10 uF | Capacitor_THT:CP_Radial_D4.0mm_P2.00mm | C3 |
| 1 | 10k | Potentiometer_THT:Potentiometer_ACP_CA9-V10_Vertical | RV1 |
| 1 | 22 uF | Capacitor_SMD:C_0805_2012Metric | C4 |
| 1 | 220R | Resistor_SMD:R_0603_1608Metric | R5 |
| 1 | 22k | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | 74LS132 | Package_DIP:DIP-14_W7.62mm_Socket | U1 |
| 1 | 74LS74 | Package_DIP:DIP-14_W7.62mm_Socket | U3 |
| 1 | BC546 | Package_TO_SOT_THT:TO-92_Inline | Q1 |
| 1 | LED Red | LED_SMD:LED_0603_1608Metric | D4 |
| 1 | LOGO | LOGO | G*** |
| 1 | NE555P | Package_DIP:DIP-8_W7.62mm_Socket | U2 |
| 1 | male | Connector_PinHeader_2.54mm:PinHeader_2x01_P2.54mm_Vertical | J1 |
| 1 | push button | Button_Switch_THT:SW_PUSH_6mm | SW1 |
Questions
How big is the Debugger PCB?
It measures 64 × 24 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Debugger use?
36 parts, built around the 74LS132P-E, 74LS74PC, NE555P and BC546. 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 Debugger KiCad files?
From the QSmally/Schematics-Debugger repository on GitHub, at the commit this page was made from: the board is Debugger.kicad_pcb and its schematic Debugger.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Debugger design in my own project?
Its repository states no licence, so its author keeps all rights: ask QSmally before reusing the design.
Similar boards
- 2 layers407 × 184 mm
TRS-80-Model I Jap50-E1
RetroStack/TRS-80-Model-I-Jap50-E1
Hardware Replica of the TRS-80 Model I Revision HE11E011550
253 parts1MIT - 2 layers93.4 × 80.2 mm
- 2 layers99.1 × 65.9 mm
- 2 layers304.5 × 146.1 mm
CPU-080039
stonedDiscord/Automatenplatinen
Reverse engineerte Hardware aus deutschen Spielautomaten.
30 parts5BSD-2-Clause - 2 layers170 × 170.1 mm
- 2 layers248.9 × 139.7 mm
GIMIX DMA Floppy
roberto314/GIMIX_reproduction
Reproducing SS-50 and SS-30 cards and GIMIX Ghost Case and Mainboard
138 parts1BSD-2-Clause - 2 layers320.7 × 155.8 mm
