HardLabs

CW keyer

ekinefe·CW_keyer·V-3.0/V-3.0_BUILD/V-3.0_BUILD.kicad_pcb

CW keyer PCB layout, top view — open source AVR/Arduino board by ekinefe

About the CW keyer PCB

CW keyer is an open source AVR/Arduino PCB design by ekinefe, published on GitHub. It is a 2-layer board measuring 238 × 113.9 mm, with 54 components from 31 distinct parts.

Its main chip is the ARDUINO_UNO_R3, from the AVR/Arduino family. Other key parts include the LM386. By type, the board carries 21 resistors, 10 switches, 8 capacitors, 3 connectors, 2 ICs and 2 diodes.

Main components on the CW keyer

LM386ARDUINO_UNO_R3

CW keyer bill of materials (BOM)

54 components, 31 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
LM386
PCF8574T
U1
1
LM386
U2
1
ARDUINO_UNO_R3
Arduino_Nano_Every
A1
1
MIC_OUT
J1-OUTPUT1
1
HeadPhon_Jack
J1-OUTPUT2
1
PADDLE_IN
J1-OUTPUT3
1
Buzzer
BZ1
1
WC1602A
DS1-2x16_LCD1
1
10K
RV1
4
R_Potentiometer
RV1-Headphone_VOL1, RV2-Buzzur_TONE1, RV2-Buzzur_VOL1, RV2-Buzzur_WPM1
8
SW_Push
SW1, SW5-CELAN1, SW5-F1, SW5-MODE1, SW6-F2, SW7-F3, SW8-F4, SW9-F5
1
SW_DIP_x08
SW2
1
SW_DIP_X04
RotaryEncoder_Switch
SW3
1
LED_GREEN
D1-MRS1
1
LED_RED
D2-PWR1
3
10UF
10uF
C1, C3, C4
1
0.05UF
0.05uF
C2
3
1 uF
C5, C6, C9
1
0.1UF
0.1uF
C7
1
220
1K
R1
Show 11 more
QtyPartRefs
1
180
10K
R2
1
270
10K
R3
2
10K
R4, R20
7
1K
R5, R6, R7, R8, R13, R14, R15
1
100OHM
330
R9
1
100OHM
10K
R10
2
10K
R11, R17
1
470
270
R12
1
10K
180
R16
1
470
R18
2
100Ohm
R19, R21

CW keyer design files

The KiCad project lives in the ekinefe/CW_keyer repository on GitHub; these links point at the commit this page was built from.

CW keyer: common questions

What microcontroller does the CW keyer use?

The CW keyer is built around the ARDUINO_UNO_R3, from the AVR/Arduino family.

How big is the CW keyer PCB?

The CW keyer measures 238 × 113.9 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the CW keyer?

54 components, from 31 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the CW keyer design files?

From the ekinefe/CW_keyer repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the CW keyer design in my own project?

The repository has no license, so all rights stay with ekinefe. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the CW keyer without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.

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