Boards by kholia

89 boards

Open-source boards designed in KiCad by kholia on GitHub, from 15 repositories. A board’s address here is its repository’s there.

2 layers97.5 × 59.3 mm
Control Board
kholia/Easy-Digital-Beacons-v1
A simple and easy Arduino / Pi Pico / ESP8266-powered WSPR, FT8, and FT4 beacon system which uses NTP + DS3231 RTC for timing. Super extensible! Now comes with optional GPS support.
17 parts89
2 layers95.4 × 92.4 mm
Panelized
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
362 parts31
2 layers89.2 × 63.5 mm
HF PA v10
kholia/HF-PA-v10
HF-PA-v10 ;) Is this the end of the search for a 5W Digital PA? HF-PA-v10 is now a rugged 10W PA! We also do 100W+ now ;)
59 parts24
2 layers97.1 × 97 mm
PDX
kholia/Easy-Transceiver
Easy Digital 'FT8' Transceiver. Easy-Transceiver v0.01.
90 parts15
2 layers99.6 × 84.7 mm
Amplified WSPR Beacon v4
kholia/Easy-Beacons-STEM
Easy-Beacons project adapted for STEM education. Powered by Raspberry Pi Pico (W) boards. WSPR + FT8 beacons for science (TM).
54 parts13
2 layers76.1 × 47 mm
G8GYW QRP RF Meter
kholia/G8GYW-QRP-RF-Meter
QRP RF Power + SWR meter. Fork of https://g8gyw.github.io/ work.
33 parts13
2 layers92.8 × 98.8 mm
Panelized
kholia/pico-cw-beacon-drs
Direct-RF-Synthesis CW Beacon PoC using Raspberry Pi Pico. No Si5351 is needed. HF and VHF fox! Have fun! ;) Comes with 5W amplifier + LPF!
368 parts12
2 layers102 × 72 mm
HF PA Combined
kholia/HF-PA-v6
RF "Lego" blocks. Quite-Linear HF broadband RF amplifier experiments for higher bands.
40 parts11
2 layers43.5 × 40.7 mm
TR Switch
kholia/Simple-TR-Switch
VU3CER's non-RF-sensing, MCU controlled Simple T/R Switch with RX Grounding!
18 parts11
2 layers86.4 × 70.5 mm
Adjustable Load v1.1
kholia/Adjustable-Load-v1.1
Easy + Cost-Effective Variable Electronic Load.
20 parts8
2 layers95.4 × 92.4 mm
Panelized
kholia/ConsensusBasedTimeSync
A portable, efficient, passive, consensus based (relative) time synchronization mechanism over radio waves. Cost-effective radio receivers too!
326 parts7
2 layers90 × 99.9 mm
HF PA v10
kholia/Global-Communications-Transceiver
Open-source files for Global Communications Transceiver
102 parts6GPL-3.0
2 layers
LiDi
kholia/Light-Intuitive-Digital-Interface
LiDi (Light-Intuitive-Digital-Audio-Interface) for µBITX. Note: All the included designs (and some other ones) were simulated in LTspice, and then tested on air. Have fun, and 73!
13 parts6
2 layers30.1 × 19.1 mm
3-Pole LPF
kholia/Multi-WSPR
Three WSPR RF streams using one Si5351! Written for K1TE (Brad).
9 parts6
2 layers60 × 68.7 mm
Player
kholia/mShuffle
https://rfcorner.in/posts/rethinking-tangara-music-player/
35 parts2
2 layers97.5 × 53.2 mm
Control Board
kholia/Easy-Digital-Beacons-v1
A simple and easy Arduino / Pi Pico / ESP8266-powered WSPR, FT8, and FT4 beacon system which uses NTP + DS3231 RTC for timing. Super extensible! Now comes with optional GPS support.
13 parts89
2 layers97.5 × 59.3 mm
Control Board
kholia/Easy-Digital-Beacons-v1
A simple and easy Arduino / Pi Pico / ESP8266-powered WSPR, FT8, and FT4 beacon system which uses NTP + DS3231 RTC for timing. Super extensible! Now comes with optional GPS support.
16 parts89
2 layers30.5 × 21.6 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
16 parts31
2 layers30.5 × 21.6 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
17 parts31
2 layers30.5 × 21.6 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
16 parts31
2 layers30.5 × 21.6 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
15 parts31
2 layers21.5 × 16 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
9 parts31
2 layers21.5 × 16 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
11 parts31
2 layers38 × 26 mm
Adafruit Si5351A
kholia/Si5351-Module-Clone-TCXO
Si5351-Module-Clone with low PPM TCXO! Drop-in replacement for the Adafruit's Si5351 module. 3.3v ONLY!
14 parts31