4 layers107.6 × 59.8 mm
TimeDisk
garrettsworkshop/TimeDisk
Apple II memory expansion card with 1 MB battery-backed RAM and NoSlotClock-compatible clock
70 parts19
2 layers37.5 × 23 mm
Signalgenerator
c0pperdragon/LumaCode152Definition of the "LumaCode" signal standard with reference implementation
- Size
- 37.5 × 23 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 28
- Pads
- 79
- Tracks, vias
- 142, 14
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 22 Jun 2023
- Updated
- 10 Oct 2026
Overview
Signalgenerator is an open-source printed circuit board by c0pperdragon, from the c0pperdragon/LumaCode repository on GitHub. It is a 2-layer board of 37.5 × 23 mm with 19 parts on 28 nets, routed with 142 tracks and 14 vias.
It is built around the 74LVC04AD and AMS1117-3.3. Its parts include 8 resistors, 4 capacitors, 3 ICs, 1 connector and 1 switch.
Main components
2
74LVC04AD
SO-14-40℃~+125℃ 1 1.08V~2V 1.2V~3.6V 1.2V、1.8V、2.2V、2.2V、2.4V 120mV~800mV 24mA 24mA 4.5ns@3.3V,50pF 40uA 6 74LVC Schmitt trigger SO-14 Inverters ROHSNexperiaInverters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdLumaCode
Definition of the "LumaCode" signal standard and documentation of various implementations.
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4 |
| 2 | 100nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C3, C4 |
| 2 | 10uF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2 |
| 1 | 180 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R5 |
| 1 | 270 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R6 |
| 1 | 390 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R8 |
| 1 | 560 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7 |
| 1 | 74LVC04 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U3 |
| 1 | AMS1117-3.3 | Package_TO_SOT_SMD:SOT-223-3_TabPin2 | U1 |
| 1 | Barrel_Jack_Switch | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | Conn_Coaxial | Projectfootprints:RCA_JACK | JLUM1 |
| 1 | SW_DIP_x04 | Package_DIP:DIP-8_W7.62mm | SW1 |
| 1 | XO2-DIP20 | Package_DIP:DIP-20_W7.62mm | U2 |
| 1 | XO53 | Oscillator:Oscillator_SMD_EuroQuartz_XO53-4Pin_5.0x3.2mm | X2 |
Questions
How big is the Signalgenerator PCB?
It measures 37.5 × 23 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Signalgenerator use?
19 parts, built around the 74LVC04AD and AMS1117-3.3. 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 Signalgenerator KiCad files?
From the c0pperdragon/LumaCode repository on GitHub, at the commit this page was made from: the board is signalgenerator/board/board.kicad_pcb and its schematic signalgenerator/board/board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Signalgenerator design in my own project?
Its repository states no licence, so its author keeps all rights: ask c0pperdragon before reusing the design.
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