2 layers178.4 × 115.6 mm
CR2021 CPU v2
derpflanz/castle-runner
This is my hobby project in making a 6502 based 8-bit computer from scratch. The end goal is to have it run Castle Runner, a game I made many moons ago.
47 parts
2 layers100.3 × 83.8 mm
Kicad prototype
CrazyChip/spectrum1AVR based audio spectrum analyser
- Size
- 100.3 × 83.8 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 72
- Nets
- 55
- Pads
- 233
- Tracks, vias
- 1,375, 36
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 3
- Created
- 22 Jul 2014
- Updated
- 15 Dec 2014
Overview
Kicad prototype is an open-source printed circuit board by CrazyChip, from the CrazyChip/spectrum repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 100.3 × 83.8 mm with 72 parts on 55 nets, routed with 1,375 tracks and 36 vias.
It is built around the ATMEGA328-PU, LM324 and BC846B. Its parts include 27 capacitors, 16 resistors, 7 switches, 4 connectors and 3 ICs. It belongs with the audio and music and sensors and measurement boards and the AVR (ATmega, ATtiny) boards of this library.
Main components
3
ATMEGA328-PU
PDIP-28-40℃~+85℃ 1.8V~5.5V 10bit 1KB 20MHz 23 2KB 32KB 8 Bit AVR Built-in FLASH PDIP-28 Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
LM324
SOP-14-1.5V~10V 0℃~+70℃ 24V 250nA 3V~20V 4 40mA 50nA 700uA 7mV 80dB SOP-14 Operational Amplifier ROHSHXY MOSFETOperational Amplifier
BC846B
SOT-23-65℃~+150℃ 1 NPN 100MHz 100mA 200 200mV 250mW 5uA 65V 6V NPN SOT-23 Bipolar (BJT) ROHSNexperiaBipolar (BJT)
README
README.mdspectrum analyzer
Accurate and universal AVR based audio spectrum analyzer
Main goals:
- any size character LCD as a display (HD44780 compatible)
- linear and speaker level signal compatibility (using attenuators)
- serial output for configuration and control (TTL level)
Schematics and PCB designed in Kicad, 2013-07-07 BZR 4022 version. All files are provided under GPL v3.
Parts
72| Qty | Value | Footprint | References |
|---|---|---|---|
| 11 | 1uF | SM1206 | C1, C5, C9, C11, C12, C13, C14, C17, C26, C27, C28 |
| 7 | 0.1 | SM1206 | C2, C6, C7, C16, C18, C19, C23 |
| 5 | 100K | SM1206 | R1, R2, R3, R15, R16 |
| 5 | 220K | RV2 | RV1, RV2, RV4, RV5, RV6 |
| 4 | 10uF | C1V5H | C10, C20, C24, C25 |
| 2 | 160 | SM1206 | R5, R7 |
| 2 | 1M | SM1206 | R10, R14 |
| 2 | 20 | SM1206 | C21, C22 |
| 2 | 6K8 | SM1206 | R17, R18 |
| 2 | 9.1 | SM1206 | R4, R6 |
| 1 | 0.047 | SM1206 | C4 |
| 1 | 0.33 | SM1206 | C3 |
| 1 | 10K | RV2X4 | RV3 |
| 1 | 10K | SM1206 | R11 |
| 1 | 10uH | R3 | L1 |
| 1 | 1K | SM1206 | R12 |
| 1 | 20MHz | Q_49U3HMS | X1 |
| 1 | 220 | SM1206 | R13 |
| 1 | 220uF | C1V7H | C8 |
| 1 | 7805 | LM78XX | U1 |
| 1 | ADC6 | PIN_ARRAY_2X1 | JP4 |
| 1 | ADC7 | PIN_ARRAY_2X1 | JP5 |
| 1 | ATMEGA328 | TQFP32 | IC1 |
| 1 | ATTENUATOR1 | PIN_ARRAY_2X1 | JP1 |
| 1 | ATTENUATOR2 | PIN_ARRAY_2X1 | JP2 |
| 1 | AVR-ISP-6 | pin_array_3x2 | CON1 |
| 1 | BC846B | SOT23EBC | Q1 |
| 1 | BUTTONS | PIN_ARRAY_5x1 | P3 |
| 1 | BYPAS/REG | PIN_ARRAY_3X1 | JP6 |
| 1 | INPUT | bnc | P1 |
| 1 | LCD | LCD_ALPHA | S1 |
| 1 | LM324 | SO14N | U2 |
| 1 | OPT1_BTN | SW_PUSH_SMALL | SW1 |
| 1 | OPT2_BTN | SW_PUSH_SMALL | SW2 |
| 1 | OPT3_BTN | SW_PUSH_SMALL | SW3 |
| 1 | OPT4_BTN | SW_PUSH_SMALL | SW4 |
| 1 | OPTION | PIN_ARRAY_2X1 | JP3 |
| 1 | POWER | JACK_ALIM | P2 |
| 1 | RST_BTN | SW_PUSH_SMALL | SW5 |
| 1 | Rx/Tx | PIN_ARRAY_3X1 | K1 |
Questions
How big is the Kicad prototype PCB?
It measures 100.3 × 83.8 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Kicad prototype use?
72 parts, built around the ATMEGA328-PU, LM324 and BC846B. 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 Kicad prototype KiCad files?
From the CrazyChip/spectrum repository on GitHub, at the commit this page was made from: the board is kicad-prototype/sa.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Kicad prototype design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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