Adventures of a Tech, avonturen van een techneut

Flux core. It is not going anywhere soon!

http://www.hamradio.in/circuits/grid_locator_system.php This code will convert a Maidenhead locator to Latitude/Longitude in degrees. It seems that everyone tries to implement this, but I can not find any clean source code... So here is my implementation, 2 ways, from lat,long -> maidenhead and reverse... This is plain "C" code tested on linux, but I will include it on my STM32F4 dev board. typedef struct { double latitude; double longitude; int errorcode; } lat_lon_t; uint8_t to_upper( char c) { if (c >= 'a' && c <= 'z') { return c - 0x20; } return c; } // the equator and the 0 meridian are the reference // we call them +90 (instead of 0) and +180 (instead of 0) to prevent negative numbers // the world is divided into 18 * 18 fields (324 fields total) // these fields are sub-divided into squares and sub-squares and sub-sub-squares etc forever // but only 5 iterations make sense (size of a ho...

Thanks to KiCAD and PCBWAY things look very nice. The PCB arrived to my door in 6 days after sending the data to PCBWAY.COM Time to heat up the soldering iron (vapour phase soldering is my way FYI, not the iron anymore) Debugging in action, LED blinking, GDB running, Clion as my primary IDE for this project, integrates with CubeMX from ST. New V3 STLINK works great. The blink was active only 6 days after sending the PCB data to China. How about some fast development!

Conditions are good today. I have my little transmitter with about 0.1 Watt of RF power (could be less). I get my data across the globe : look here 40m band, from Netherlands to Antarctica, USA, Australia and more. This is fun. I am using a QRP labs kit : https://qrp-labs.com/ultimate3.html My antenna is a piece of wire of about 10 meters hanging out of the window not a real antenna! So much fun with so little RF power! Best regards PA2LVD

Maxtor Shared Storage NAS 300 GB Summary of long adventure: TL;DR. ONE DISK IS NOT AN OPTION FOR A NAS - Audience : advanced users - linux skill required : yes - strong opinion : yes - frustration : yes It looks so nice in the picture : storing data on a NAS, not on the local system. You can access it from anywhere in the network, all is fine. Until.. The NAS breaks down and you forgot the backups.. I had this NAS for a long time (several years), somewhere safe in the house, in a dry and protected and cool place, nobody would be able to find it, a digital safe, connected to my local network. It seems a smart idea, but it really was not. Here is my summary of trouble to get my data back. 1) The NAS did not appear in my network anymore 2) Checked power supply, switches, cables 3) conclusion, NAS is bad 4) reboot, does not come online again 5) open it up, take out harddisk, how hard can it be? Right? I connected the disk to my machine with one of those PATA/...

Today I received an envelope addressed to my company in the mail from EBN (European business number, Netherlands department) It looked official and impressive, it had a return envelope. I needed to return the form to : EBN, PO BOX 11 35 58, 20435 Hamburg. It had some forms inside, that I needed to fill in and return, looked almost legit.  No big deal right, fill in and return? But I read all the small print (gray on lighter gray) too, and it is a deception, when you return this form you actually sign a contract with a company DAD GmbH in Germany for 977 euro per year. They will put your name on a website for this amount of cash. It is clearly stated in the small print on grey paper, EBN is not related to any organisation or institution of the European Union or Commission. My advise, do not open, just throw it in the trash immediately! Not worth the time or money. Have a good day! Some other people received it too :  https://www.fraudehelpdesk.nl/alerts/european-...

als reactie op ; http://www.smartupnetwork.nl/ is-een-vrouwenquotum-echt- nodig/ Titel is : 6 tips om meer vrouwen naar de top te krijgen By Anita Otchere | September 5, 2016 Ik was ervan uitgegaan dat het mogelijk was inhoudelijk te reageren op de vraag en de zes genoemde punten en de vraag : "is een vrouwenquotum echt nodig?" Ik begin te twijfelen of dit wel de bedoeling was van de schrijver omdat mijn schrijfsel dat ik 3x heb gepost als reactie, maar niet geplaatst wordt. UPDATE: Na diverse emails heen en weer met de redactie van de website is mijn reactie uiteindelijk wel geplaatst op 23-7-2018. Mijn originele reactie had ik geplaatst op 22-6-2018. Eens kijken of we nu inhoudelijk kunnen discussiëren. Update : 18/6/2019 De TU/e Technische Universiteit Eindhoven (waar ik 3 jaar gewerkt heb in de research) heeft nu ook een ondoordachte ideologie op basis van discriminatie aangenomen : https://nos.nl/artikel/2289482-tu-eindhoven-opent-vacatures...