Novosti – Lemilica

Cheap EOS3 BGA64 design

Goran Mahovlić 12. February 2021. Elektronika, Mikrokontroleri 0

I bought EOS3 BGA on CrowdSupply and as I started to work on my board. After some time I have discovered that it would be hard to make it at low price.If I would do it correctly I would need to use small vias, probably buried vias so for few boards that did not make sense to me…But as I still wanted board I had some idea to do it hacky way. If I do not use VIA under BGA then all will be good and cheap. I tough that one of two approaches should work.First idea was to use just the pins I need – and not to place pads for the pins I do not need. But then I looked at the datasheet and as I discovered some pins in datasheet would not mind if they are connected on startup I used other approac... »

Adjusting microscope focus with adapter ring

Goran Mahovlić 12. February 2021. Elektronika 0

At some point I have ordered microscope. I wanted one that would have Simul-Focal Stereo with HDMI out that would allow me to work on it looking on eye peaces while recording or streaming at the same time. But it was impossible to get good focus at eye-peace and on the HDMI at the same time. I could get it close to good if I loose camera holder, but then it was shaky and not stable, but I was to lazy to fix it with some 3D printer ring… One day my friend Darko arrived, and saw that this is not stable. As he is always targeting perfection he told me he can fix this in no time… He did fast sketch of new adapter ring Next day he was back with aluminum ring And from that day microsco... »

Running wordpress in docker container

Goran Mahovlić 12. February 2021. Elektronika 0

For long time I wanted to have backup of lemilica, as I had lots of problems with site remaining up. So few days ago I decided to try docker containers. Create wordpress.yml with your favorite editor Copy code bellow to the file. If you do not need phpadmin you can remove those lines Change your_MYSQL_ROOT_PASSWORD and your_WORDPRESS_DB_PASSWORD to something else,change server_wordpress_path to some path on server wordpress can access and run with docker-compose -f wordpress.yml up -d That should give you wordpress running on port 8081 and phpadmin on port 8082 »

Using NodeRed and Grafana to log Gateway coverage

Goran Mahovlić 26. March 2018. Elektronika 0

Using ttnmapper to map nodes is often good start for mapping. But ttnmapper is still closed source and you can only use it for showing coverage of TTN gateways. If you have your own infrastructure you need some other way to visualize your GPS data. So first you need to have your data received in NODE-RED and I will not write here about that. You can get data from TTN or from your own loraserver. So now that you have your data arriving you need to setup few nodes. But first you need to install support on your server To install install worldmap node use npm cd ~ cd .node-red npm install node-red-contrib-web-worldmap After installing restart your node red and you should be able to see worldmap ... »

Reversing Mini Fabrikator V2 (Malyan M100) 3D Printer

Goran Mahovlić 12. January 2018. Elektronika 0

And all of this started when EMARD ordered one Mini Fabrikator V2 For a some time I have this small printer I have buy it from EMARD that already applied his fixes on it. When you get printer it usually comes partially disassembled with missing or unscrewed bolts and screws. When you fix that you are usually trying to set repetier host working over serial port, and on this printer this is not a good Idea. Serial port is bad to. We have tested it on linux, windows and mac and it is not working. Maybe you will be able to get is to start printing, but after few minutes you will end up in some error :( We enven tried to print over TCP you can connect to printer on port 23 and use it that... »