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swharden/AVR-projects
A collection of standalone AVR projects written in C

A device for controlling LEDs and Fans through an RS232 interface
Uart2pwm is an open-source printed circuit board by Bytewerk, from the Bytewerk/uart2pwm repository on GitHub. It is a 2-layer board of 68 × 46 mm with 63 parts on 67 nets, routed with 358 tracks and 14 vias.
It is built around the ATTINY2313A-SU and MAX232N. Its parts include 25 resistors, 17 connectors, 10 capacitors, 8 transistors and 2 ICs. It belongs with the AVR (ATmega, ATtiny) boards of this library.
| Qty | Value | Footprint | References |
|---|---|---|---|
| 16 | 120 | SMD_Packages:SMD-0603 | R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17 |
| 8 | 39 | SMD_Packages:SMD-0603 | R18, R19, R20, R21, R22, R23, R24, R25 |
| 6 | CAT | Pin_Headers:Pin_Header_Straight_1x01 | P3, P4, P7, P8, P13, P14 |
| 6 | MOSFET_P | SMD_Packages:SOT-23-GDS | Q1, Q2, Q4, Q5, Q7, Q8 |
| 4 | 1uF | Capacitors_SMD:C_0805 | C1, C2, C7, C8 |
| 2 | 100nF | SMD_Packages:SMD-0603 | C9, C10 |
| 2 | 22p | SMD_Packages:SMD-0603 | C3, C4 |
| 2 | LED_B_AN | Pin_Headers:Pin_Header_Straight_2x02 | P15, P16 |
| 2 | LED_G_AN | Pin_Headers:Pin_Header_Straight_2x02 | P9, P10 |
| 2 | LED_R_AN | Pin_Headers:Pin_Header_Straight_2x02 | P5, P6 |
| 2 | MOSFET_N | SMD_Packages:SOT-23-GDS | Q3, Q6 |
| 1 | 100uF | Capacitors_Elko_ThroughHole:Elko_vert_11.5x8mm_RM3.5 | C5 |
| 1 | 10k | SMD_Packages:SMD-0603 | R1 |
| 1 | 16 MHz | Crystals:Crystal_HC49-SD_SMD | X1 |
| 1 | 470uF | Capacitors_Elko_ThroughHole:Elko_vert_11.5x8mm_RM3.5 | C6 |
| 1 | ATTINY2313A-S | SMD_Packages:SO-20-L | IC1 |
| 1 | CONN_01X03 | Pin_Headers:Pin_Header_Straight_1x03 | P11 |
| 1 | CONN_01X04 | Connector:MOLEX_8981_4Pin | P1 |
| 1 | CONN_02X03 | Pin_Headers:Pin_Header_Straight_2x03 | P2 |
| 1 | FAN0 | Pin_Headers:Pin_Header_Straight_1x03 | P12 |
| 1 | FAN1 | Pin_Headers:Pin_Header_Straight_1x03 | P17 |
| 1 | MAX232 | Sockets_DIP:DIP-16__300 | U1 |
It measures 68 × 46 mm and has 2 copper layers, 1.6 mm thick.
63 parts, built around the ATTINY2313A-SU and MAX232N. 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.
From the Bytewerk/uart2pwm repository on GitHub, at the commit this page was made from: the board is Hardware/uart2pwm/uart2pwm.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Its repository states no licence, so its author keeps all rights: ask Bytewerk before reusing the design.

swharden/AVR-projects
A collection of standalone AVR projects written in C




bga/avr-hid-usb-init-tester
Avr attiny2313 soft usb hid "keyboard" for testing bios usb initialization. Device is blinking if bios assign usb endpoint address and continue sending USB SOF (ie bios in alive).


lyase/hello-bulb
making the simplest usb device using atmel2313 the board design is available in kicad format .code is c, licence GPL V3
