Maj mechatronics

DIY 1000mW 2.4gHz RF Amplifier

Fri, 16 Dec 2022 20:09:52 +0100

BOM and gerber files now avalible: s52mp/OpenRcAmp

SKY65162

I designed a low cost 2.4ghz RF Amplifier based around SKY65162-70LF. The SKY65162 offers wide frequency operation range and is suited for both 900mHz and 2.4gHz both very popular in the RC comunity.

The RF amplifier IC is a 400 to 3800 MHz Linear Power Amplifier that can output up to 30.0 dBm with 20.0 dBm gain.

Schematics

I created the chematics based on amplifiers typical aplication which also offers component values for its operation bands and than designed a 4 layer pcb following the manufacturers sample design found in the data sheet.

DIY FPV Field Pack From Refurbished Li-Po Cells

Fri, 16 Dec 2022 17:01:11 +0100

I made a DIY field charging pack for flying FPV drones and simultaneously charging your packs while on the field.

It is made from 24 rufurbished li-po cells wired in 6S4P configuration. It has a capacity of 22000 mAh on 22,2 V or 490Wh. It can charge up to 20 pacs with a single charge.

Video link

Heavy duty DIY FPV cloverleaf antenna

Fri, 18 Feb 2022 00:00:00 +0000

I made a Heavy duty DIY FPV cloverleaf antenna using 3d printed parts to help the antenna hold its shape and survive heavy FPV bando bashing.

The antenna is constructed with 0.8mm copper wire pushed inside individual 3d printed petals of the cloverleaf. The petals are than glued to a unibody holder which holds them in place where they can be soldered to the coaxial cable.

The petal and body are all glued together with CA glue. The base is held on the coaxial cable only by friction but a layer of heat shrink tube can be used for added fixturing.

Stl files for 3d printing can be downloaded here: https://www.thingiverse.com/thing:5252896

A quick SWR sweep show that the antenna is properly tuned for the desired band of 5.8 Ghz

Custom mechanical keyboard design

Wed, 03 Feb 2021 00:00:00 +0000

About

Fri, 25 Jan 2019 00:00:00 +0000

Hi there

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nullam nec interdum metus. Aenean rutrum ligula sodales ex auctor, sed tempus dui mollis. Curabitur ipsum dui, aliquet nec commodo at, tristique eget ante. Donec quis dolor nec nunc mollis interdum vel in purus. Sed vitae leo scelerisque, sollicitudin elit sed, congue ante. In augue nisl, vestibulum commodo est a, tristique porttitor est. Proin laoreet iaculis ornare. Nullam ut neque quam.

Fusce pharetra suscipit orci nec tempor. Quisque vitae sem sit amet sem mollis consequat. Sed at imperdiet lorem. Vestibulum pharetra faucibus odio, ac feugiat tellus sollicitudin at. Pellentesque varius tristique mi imperdiet dapibus. Duis orci odio, sodales lacinia venenatis sit amet, feugiat et diam.

Sed a leo id risus venenatis vulputate non quis nulla. Aenean nisl quam, lacinia pulvinar orci sit amet, eleifend eleifend dui. Nulla tempor ligula leo, eu vehicula quam condimentum a. Vestibulum ante ipsum primis in faucibus orci luctus et ultrices posuere cubilia Curae; Nulla gravida tristique nunc sed semper. Morbi nec felis odio.

Sed efficitur, lacus ac scelerisque pellentesque, lectus risus dignissim nisl, fermentum semper lectus diam eget lacus.
Nunc ornare purus enim, id eleifend mauris vestibulum volutpat.
Aenean facilisis ut ipsum condimentum ultrices.
Fusce sed metus vulputate, lobortis purus et, finibus purus. Suspendisse quis posuere lorem. Vivamus vulputate nec risus in pulvinar.

Showcase

Wed, 18 Jul 2018 00:00:00 +0000

Header 2

Fusce pharetra suscipit orci nec tempor. Quisque vitae sem sit amet sem mollis consequat. Sed at imperdiet lorem. Vestibulum pharetra faucibus odio, ac feugiat tellus sollicitudin at. Pellentesque varius tristique mi imperdiet dapibus. Duis orci odio, sodales lacinia venenatis sit amet, feugiat et diam.

Header 3

Nulla libero turpis, lacinia vitae cursus ut, auctor dictum nisl. Fusce varius felis nec sem ullamcorper, at convallis nisi vestibulum. Duis risus odio, porta sit amet placerat mollis, tincidunt non mauris. Suspendisse fringilla, odio a dignissim pharetra, est urna sollicitudin urna, eu scelerisque magna ex vitae tellus.

/* PostCSS code */

pre {
  background: #1a1a1d;
  padding: 20px;
  border-radius: 8px;
  font-size: 1rem;
  overflow: auto;

  @media (--phone) {
    white-space: pre-wrap;
    word-wrap: break-word;
  }

  code {
    background: none !important;
    color: #ccc;
    padding: 0;
    font-size: inherit;
  }
}

// JS code

const menuTrigger = document.querySelector('.menu-trigger')
const menu = document.querySelector('.menu')
const mobileQuery = getComputedStyle(document.body).getPropertyValue('--phoneWidth')
const isMobile = () => window.matchMedia(mobileQuery).matches
const isMobileMenu = () => {
  menuTrigger.classList.toggle('hidden', !isMobile())
  menu.classList.toggle('hidden', isMobile())
}

isMobileMenu()

menuTrigger.addEventListener('click', () => menu.classList.toggle('hidden'))

window.addEventListener('resize', isMobileMenu)

<!-- HTML code -->

<section id="main">
  <div>
   <h1 id="title">{{ .Title }}</h1>
    {{ range .Pages }}
      {{ .Render "summary"}}
    {{ end }}
  </div>
</section>

Header 4

Curabitur scelerisque felis viverra varius scelerisque. Ut enim libero, molestie gravida blandit at, mollis ornare tellus. Cras arcu mi, ultrices vel pulvinar vel, volutpat eu tortor. Nullam nec eros quis massa ultrices iaculis sed in metus. Praesent sollicitudin sem sit amet orci tempor gravida.

Maecenas elementum vitae nibh vitae porttitor.
Aenean consequat, risus ut cursus placerat, arcu nulla sodales risus, ut molestie tellus tellus et dui.
Integer imperdiet turpis vitae lacus imperdiet, ut ornare ligula auctor. Integer in mi eu velit vehicula suscipit eget vulputate nulla.
Etiam vitae enim quis velit lobortis placerat a ut sem.
- Curabitur lobortis ante sit amet orci pulvinar, sollicitudin viverra nunc accumsan.
- Praesent fermentum orci quis leo facilisis posuere.

Aliquam erat volutpat. In hac habitasse platea dictumst. Nunc ut tincidunt mauris. Sed at gravida risus, id semper magna. Nullam vitae enim mattis, sodales neque non, pharetra elit. Cras sit amet sagittis augue, et finibus turpis. Ut tempus tincidunt diam vel pharetra. Nulla porttitor odio sit amet nulla scelerisque, quis aliquam mi imperdiet. Sed tincidunt dui vel tellus vestibulum rhoncus. Donec tempus ultrices velit.