DIY FrSky Horus X10(s) Car Charger

For those familiar with electronics, this is the short version: Connect a 12V cigarette lighter adapter to one and a barrel plug to the other side of a step-up converter and your car charger is done. For more details, read on…

The X10(s) comes with a wall charger and a 2S 7.2V 2600mAh Li-ion Battery. If the battery is not fully charged, and sometimes even if it is, the transmitter (TX) might not get through an entire day of slope flying. So here is a way to charge it through a 12V cigarette lighter adapter or your 12V DC power supply unit.

This solution does not call for any “invasive” mods like soldering inside the TX, drilling the TX housing, changing battery chemistry and so on.

One side note: The FrSky “Wall Charger” is not a charger with all the charging intelligence and algorithms inside it but only an AC-DC converter providing a constant 15V 1A output. The charging intelligence is on a printed circuit board (PCB) attached to the Li-ion battery inside the radio and it decides how much charging power is coming through and when to stop. In other words, all we need to do to have our car “charger” is to put together a device which provides 1A at 15V.

The main component is a so-called step-up volt converter which is sold on eBay for little money. There are many models, some with a LED volt display. The one I bought is simple, cheap and small:

The step-up converter I chose increases voltage from 3-24V input to 5-28V output and can provide up to 2A. It is important to note, that it can only increase the voltage and not reduce it. So if we need a 15V output to charge the X10(s), this specific converter needs an input between 3V and 15V. In my case, I will use the car battery as a power supply.

Components used:

  • 1 Step up volt converter
  • 1 Car lighter adapter for banana plugs
  • 1 Set of banana plugs
  • 1 Barrel plug: 1.7mm inside, 4mm outside, plugs into the X10(s)
  • Cable, shrink tubing and a couple of plugs

Optional: Instead of using a new barrel plug, you can cut off the one at the standard wall charger and connect it back using a plug (e.g. XT30, but almost anything will do). That plug would then also be used to connect the step up volt converter.


I would like to thank James Mills and Colan Casey who helped through FB. 

Pontresina

A fantastic hike in the Engadin with a sweeping view of the Silsee and Silvaplana. My first sighting of Piz Bernina (4049m), the highest peak in the Graubünden!

This tour details:

https://www.outdooractive.com/de/wanderung/pontresina/von-der-alp-languard-ueber-die-chamanna-segantini-nach-muottas-muragl/25408392/

https://www.pontresina.ch/sommer/mountainbike/biketouren/detail/von-der-alp-languard-ueber-die-chamanna-segantini-nach-muottas-muragl/

Val da Camp and Lagh da Saoseo

Sfazù (1622m) – Rifugio Saoseo – Camp – Lagh da Val Viola (2159m) – Val Viola (2258m) – Lagh da Saoseo (2028m) – Terzana – Sfazù (1622m)

Length: 15km / Ascent & descent: 773m / walking time: 5 hours

Arrived at Sfazù (1622m), today’s trailhead, by bus from Pontresina. The scenery to get there was already impressive. We passed by the glacier and went through the isolated, lonesome area of the very eastern corner of Switzerland.

Sfazu

Mini-buses run to Camp Alp but it was booked out so I walked this one-hour stretch. The sunny weather lured many hikers in the same direction.

Soon two Swiss women joined me. We started talking while walking and I found out that one of the women from St. Gallen has a 28-year-old godchild who is a big Japan fan and lives in Nagasaki for 3 years!

In our last three hikes my hiking buddy Rieko-san and I met Swiss hikers whose adult children love Japan and learn Japanese. It is an amazing coincidence and I am happy to know that there are so many Japan fans in Switzerland!

After passing by Rifugio Saoseo, relatively easily I arrived at the beautiful green lake, Lagh da Val Viola. A great place for picnic lunch and I lazed around for one hour at the lakeside.

Today, the Val da Viola circles around the lake in a very autumn colors atmosphere. From the highest point of today’s trail (2258m) I see the snow-capped Piz Palù (but not Piz Bernina!) and the Morteratsch Glacier.  The main purpose of this hike was to see the Lake Saoseo, but this part of the trail on this valley was another highlight!

After a quite steep and slippery descent, the famous Lagh da Saoseo appeared. I saw a breath-taking photo of this lake two years ago and since then wanted to see it with my own eyes. Apparently, Saoseo is considered to be one of the most beautiful lakes in Graubünden. Painfully cold it was as well, when I put my feet in!

Hanging out a long time here enjoying the sun, I left the lake and headed down another route to Sfazu. This route along the stream was beautiful, with small bridges and some isolated typical stone farm houses.

As I stayed too long at the lakeside, I just made it to the bus five minutes before it arrived!

The trail details:
https://wegwandern.ch/listing/sfazu-rif-saoseo-lagh-da-saoseo-sfazu/