https://ukhas.net/wiki/ 2026-04-20T08:49:10+00:00 https://ukhas.net/wiki/ https://ukhas.net/wiki/lib/tpl/dokuwiki/images/favicon.ico text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:arduino_design?rev=1593298921&do=diff Arduino based node Components * ATmega328 (with Arduino bootloader) * RFM69HW 868MHz or 915Mhz module * MCP1700 3.3v Voltage Regulator * 28pin DIL IC Socket * 2x 1uF Ceramic Cap * Various headers and sockets * Stripboard Guide Step 1 text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:chip_design?rev=1593298921&do=diff C.H.I.P is a small $9 Linux SBC with onboard eMMC, bluetooth, wireless and LIPO battery charger. This can provide an all in one gateway device. There is also the PocketCHIP which puts the C.H.I.P, small screen, battery and keyboard in a small case. At present the standard kernels don't appear to provide SPI access, however there are community kernels and device tree's that will enable SPI. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:lpc810_design?rev=1593298921&do=diff LPC810 based node Windows? Follow these instructions for building/uploading: LPC810 based node - Windows build/upload instructions Toolchain * Requirements * arm-none-eabi-gcc (compiler) * lpc21isp (uploader) * LPC810 UKHASnet Codebase - <https://github.com/jamescoxon/LPC810> * Grab the GCC binaries from <https://launchpad.net/gcc-arm-embedded> for your particular operating system and install them. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:lpc810_win?rev=1593298921&do=diff LPC810 based node - Windows build/upload instructions There are probably a few ways of going about doing this, but this is the way that worked for me. These instructions are mainly from <https://learn.adafruit.com/downloads/pdf/getting-started-with-the-lpc810.pdf> The main page about James' LPC810 node can be found at LPC810 based node Software required text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:lpc812_design?rev=1593298921&do=diff LPC812 Node Introduction The LPC812 is a 32-bit ARM Cortex-M0+ chip which is cheap, easily available and relatively easy to solder with just a standard iron. It contains a bootloader and so can be programmed over serial. Onboard it has: * 16 kB of flash memory text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:moteino?rev=1593298921&do=diff Moteino (Arduino) node design * Based on the Moteino development platform from LowPowerLab * ATmega328 * RFM69HW * MCP1700 * Optional SPI Flash Memory * Advantages * Nice SMD design * Reasonable Price * Disadvantages * No UK sellers - need to get from US text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:rasp_pi_design?rev=1593298921&do=diff Raspberry Pi Node Design The Broadcom processor used on the Raspberry Pi supports 3.3v SPI, which makes it trivial to attach a RFM69 with no other components. The Pi makes a good Ethernet-enabled gateway, which is easy to remotely manage. Hardware text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:rtlsdr_decoder?rev=1593298921&do=diff This guide is written using a Raspberry Pi Model 1b with RTLSDR dongle using the R820T tuner. Any Unix like system should work if you've got access to the rtl_fm tool. This guide contains steps for both Raspbian Wheezy (5/5/2015) and Raspbian Jessie Lite (26/02/2016). First Steps If using a Raspbian image you'll want to install it onto the SD card with a suitable disk imager, boot the Pi and expand the filesysyem. You'll likely want to install the relevant updates, change hostname and change … text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:rtlsdr_decoder_windows?rev=1593298921&do=diff There are a variety of ways this could be achieved. This is currently a Work In Progress You can download a copt of rtl_fm (and the other tools from <http://sdr.osmocom.org/trac/attachment/wiki/rtl-sdr/RelWithDebInfo.zip>) Precompiled binaries for windows (WIP) Cross Compile from Raspbian Create a folder to keep the compiled libraries in. text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:sma_antennas?rev=1593298921&do=diff SMA Antennas FLEXI-SMA-868 * From RF Solutions * 1/4 Wave Whip * SMA * CPC * Datasheet * Testing Outcome - poor ANT-8WHIP3H-SMA * From RF Solutions * Hinged Whip * 868Mhz * +3dBi * CPC * Testing Outcome - moderate ANT-900MS * From Easy Radio text/html 2020-06-27T23:02:01+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:stm32f0_design?rev=1593298921&do=diff STM32F0 Design Prototyping * Initial prototyping was done on a STM32F0308-Discovery board which are easily available from farnell, it was attached to a RFM69HW on a breakout board using leads. * The board was programmed using the onboard ST-Link and debug was via UART and a USB/Serial converter text/html 2020-07-08T05:30:57+00:00 Anonymous (anonymous@undisclosed.example.com) https://ukhas.net/wiki/guides:wvars_project?rev=1594186257&do=diff Welland Valley Amateur Radio Society Project Introduction * A winter project for WVARS group, PCB designed by Tim, based on the original stripboard design. Components QTY Description Where to find Cost (Estimated)1 Main PCB Supplied by Colin FOC