Martin Šafránek

Martin Šafránek

Závodní střelba AVZO Kostelec a KVZ Kyjov autotuning a pctuning.
Martin Šafránek
Další nápady od uživatele Martin
[ Play Video ]I have salvaged so many old lap-top batteries ( 18650 ) to reuse them in my solar projects.It is very difficult to identify the good cells in batter...

[ Play Video ]I have salvaged so many old lap-top batteries ( 18650 ) to reuse them in my solar projects.It is very difficult to identify the good cells in batter...

The situation was that I was only able to transmit and receive through 2 or 3 walls with a distance of about 50 feet, using standard nRF24L01+ modules. This was insufficient for my intended use. I had earlier tried adding recommended capacitors, but for me and my hardware got very little to no improvement. So, please ignore them in the photos.For my remote sensors I did not want the bulk of a unit like a nRF24L01+PA+LNA with a SMA Mount and exterior antenna. So I created this modified…

The situation was that I was only able to transmit and receive through 2 or 3 walls with a distance of about 50 feet, using standard nRF24L01+ modules. This was insufficient for my intended use. I had earlier tried adding recommended capacitors, but for me and my hardware got very little to no improvement. So, please ignore them in the photos.For my remote sensors I did not want the bulk of a unit like a nRF24L01+PA+LNA with a SMA Mount and exterior antenna. So I created this modified…

Wireless Remote Using 2.4 Ghz NRF24L01 : Simple Tutorial Using of NRF24L01 & Arduino

Wireless Remote Using 2.4 Ghz NRF24L01 : Simple Tutorial Using of NRF24L01 & Arduino

Picture of IMG_20170120_230010.jpg

Picture of IMG_20170120_230010.jpg

Believe it or not, an ammo box can still be of use to you once its rounds are gone. You can use it for storage, as a toolbox, or possibly even as a Faraday cage. But if you want to use it as more than just a container, why not turn it into a portable set of speakers that you can take with you anywhere? The ammo can speaker pictured above was made by Instructables user Dustin White. He started with an empty .50 cal box, though you could probably even use thinner 5.56 or 7.62 mm cans. He…

Believe it or not, an ammo box can still be of use to you once its rounds are gone. You can use it for storage, as a toolbox, or possibly even as a Faraday cage. But if you want to use it as more than just a container, why not turn it into a portable set of speakers that you can take with you anywhere? The ammo can speaker pictured above was made by Instructables user Dustin White. He started with an empty .50 cal box, though you could probably even use thinner 5.56 or 7.62 mm cans. He…

second usage to Bluetooth module from a laptop designated to the bind.....

second usage to Bluetooth module from a laptop designated to the bind.....

Arduino reverse parking sensor

Arduino reverse parking sensor

freedomotic Open Source Building Automation Data mashup building automation framework

freedomotic Open Source Building Automation Data mashup building automation framework