Just found this great tutorial on how to make your own soldering iron from bits of wire, fiberglass tubing, nichrome wire from a hairdryer, and a rough cross section of a branch. When I was searching to find the video again to place it above, I found that there are MANY MANY different versions of …
Category Archives: Electronics
WSPR: Weak Signal Propagation Path Reporting
WSPR (pronounced “whisper”) stands for “Weak Signal Propagation Reporter”. It is a protocol, implemented in a computer program, used for weak-signal radio communication between amateur radio operators. WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Transmissions carry a station’s callsign, Maidenhead grid locator, and transmitter power in dBm. The program …
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Build a 12v Portable Power Box for Your Mobile Ham Radio Gear
Ham operators often take their gear to different locations out in the field and need a battery to power up their radios and other gear. The video below shows one way to put together a mobile power battery box using an inexpensive Plano field box. Parts Needed Plano Field Box Battery – Amstron 12V/12AH Sealed …
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Build Your Own 3D Printer – Video
This 3-part video series from RZtronics shows how to home-build your own Arduino based 3-D printer. Uses a lot of purchased parts but there’s still a lot of savings over the expensive commercially available 3D printers. The Arduino software, parts lists and sources can be found below the video on YouTube OR here at the …
Winding Your Own Toroid Inductors
Looking at the schematics for the Minima Transceiver, I notice that there are some inductors included in the top left corner of the schematic, and that the photos on the author’s page appear to show home wound inductors on a toroidal core. This post is my notes on how to calculate the amount of wire …
HF1 QRP Transceiver Schematics
This project is based around the recent HF1 QRP transceiver by Ashhar Farhan, VU2ESE. The transceiver is an interesting SSB design with wide tuning range from 0-30MHz and should cover several amateur bands. The schematic for the transceiver can be found on the Minima mail list in this post with a PDF attachment. After a …
Minima Transceiver Schematics & Code
For those who want to build their own superheterodyne transceiver, the Minima may fit the bill. Designed by Ashhar Farhan, the schematics are freely available online. Minima Schematics: http://www.phonestack.com/farhan/minima.html Backup Archive of Schematics: https://www.freelists.org/archives/minima/01-2016/pdfavh3bHrUb6.pdf Minima Arduino code on Github: https://github.com/afarhan/radiono Discussion of Minima on FreeList: https://www.freelists.org/post/minima/Minima-PCB,24 PCB for Minima builds: https://yo4hhp.wordpress.com/2014/01/22/pcb-for-minima-general-coverage-transceiver/