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ISPCS and WR-Workshop @ CERN

ISPCS-2018 and the 10th WR-workshop were held at CERN.

Antimatter experiments: ELENA, GBAR

Poronpolun Polkaisu

Poronpolun polkaisu is an easygoing MTB event at Räyskälä in Loppi. A bit of gravel roads, lot's of easy to ride good trails, and some short technical bits. They say that the trails are some of the best for MTB in southern Finland!

Time-lapse for garmin virb camera. Battery lasted about 2 hours. Go see more and better Poronpulku videos on youtube.
Organizers map and GPX-route. We rode most of it but didn't have time (and energy?) for the westward loop. Garmin Edge 520 battery died about 3/4ths into the ride so the last bit is recorded with the 735xt instead.

Iltarastit Luukki

A few weeks of Iltarastit on Sundays now, before the end of the season.

A bit of searching inside the control circle on 23, then from 15 about 45-degrees wrong direction towards 38. Just before 39 a turn downhill and had to circle back to the control.

RF-multiplexer, 3rd prototype

This is the third prototype for the 1:8 RF-multiplexer (https://www.ohwr.org/projects/rf-mux-8ch). The board is now simplified with only one 10-pin ribbon-cable attaching it to the Arduino MKR Zero + Ethernet shield. Traco PSU for 5V supply.

Iltarastit Paloheinä night-o

A bit windy but quite warm and good temperature for running. Fairly easy course but it's always more fun in the darkness 😉

Luukki MTB 23k

A bit of rain but not too bad, quite warm.

Most of the narrow trails on the northern/westward part of the route were too difficult for me to ride. The beginning and end were on gravel-roads so no worries there.

Luukki MTB 'half-course' ca 23 km.

10MHz-to-PPS board, rev2

A second try at the PPS board, this time with the correct footprint for the transistors on the sine-to-square input stage.

Still some bugs left as I had to add a diode on the MCLR pin for the PIC-programmer to work correctly.

1PPS output is phase-coherent with the 10 MHz input.
10 ms long 1PPS output, ca 2.7V into 50R load.
PPS-board, rev2. sine-to-square at the top. Sync-input and dip-switch in the middle. PPS-outputs at the bottom.
PPS into 1 Megaohm - with ringing and 3.3V amplutide..

Iltarastit Pirttimäki, night-o

First night-orienteering this fall!

4V course, Iltarastit Pirttimäki 2018-09-10

Pirttibacka MTB 25k

Oittans-Pirttibacka-Brobacka-Pirttibacka-Klockarmalmen-Oittans.

Maybe Luukki MTB next week?

Itärastit paloheinä

Fairly easy course avoiding the big hill. Bad direction out of #1 towards #2, otherwise mostly OK.

Warm +21C or so.

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