I decided to log the mains grid frequency for a full 24hr period 🤷🏼‍♂️🤓

Using the Philips PM6669 and an external OCXO (calibrated, see earlier post when I received it) I get a quite accurate result. Each measurement takes 10 seconds, so in reality there’s some averaging going on right there, removing some of the jitter and noise at those last digits. The grid frequency is highly dynamic once you reach a millihertz resolution, and that is in fact what I’m trying to capture 🙂

The PM6669 counter has a really nice feature btw., it’s max input level is 260Vrms! That’s really handy, in reality I could connect it straight to a mains outlet without damaging it, but due to the risk of transients I’m using a small transformer and the cute little Vellemann oscilloscope training kit so I can pick a more safe 12Vrms instead 👌🏻⚡️🙂

Tonight I’ll have 8640 datapoints to play with 🤓

#testandmeasurement #becauseican #electronics #electronicsengineering #engineer #velleman #philips #gridfrequency #mainsgrid

I decided to log the mains grid frequency for a full 24hr period 🤷🏼‍♂️🤓

Using the Philips PM6669 and an external OCXO (calibrated, see earlier post when I received it) I get a quite accurate result. Each measurement takes 10 seconds, so in reality there’s some averaging going on right there, removing some of the jitter and noise at those last digits. The grid frequency is highly dynamic once you reach a millihertz resolution, and that is in fact what I’m trying to capture 🙂

The PM6669 counter has a really nice feature btw., it’s max input level is 260Vrms! That’s really handy, in reality I could connect it straight to a mains outlet without damaging it, but due to the risk of transients I’m using a small transformer and the cute little Vellemann oscilloscope training kit so I can pick a more safe 12Vrms instead 👌🏻⚡️🙂

Tonight I’ll have 8640 datapoints to play with 🤓

#testandmeasurement #becauseican #electronics #electronicsengineering #engineer #velleman #philips #gridfrequency #mainsgrid

A couple of weeks ago I saw a Velleman K8600 3D printer kit on sale at a local electronics store for less than €70. Bargain!

It took just a few hours to assemble, but unfortunately I lost one of the 2 mm grub screws.

I then spent a couple of days intermittently crawling around on the floor with a magnet and a brush and found nothing :-(

When I told the nice people at Velleman about this they said they'd send me a couple of extras for free. These took a little while to arrive, and then I had a couple of busy days, so it wasn't until today that I tightened up that last grub screw and got the thing working. It took almost not effort at all to set it up and start something printing.

My other 3D printer is a reprap built in 2014. That took a lot more effort to get going but it still works well. I just thought this might be more convenient for making small things.
#reprap #3dPrinter #Velleman #k8600