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Category Archives: Electronics.
Once upon a time there was an overly enthusiastic browser of ebay items, instigated by “BigClive” to buy stuff. He purchased two Nitecore knock-off lights, a bit too cheap to be true! The packaging looks surprisingly good. Guess which one … Continue reading
As You can see, there’s nothing of interest here. This post was cancelled due to lack of material & motivation. Please proceed to the next post in this mini-series. If you’re a user of headphones, you may want to turn … Continue reading
This “beauty” appeared on my desk today. Just testing & playing with it. I used the arb sig-gen of a PicoScope 2204A for generating a unpleasant test-signal. Trying to trigger on it was “interesting” :-)
Well… the device I got at work was a sad case of “dead on arrival”. Temperature regulation was totally crazy, touching the case moved the measured value from about 350°C to 60°C, with a subsequent massive overshoot. So we have … Continue reading
Moving == carrying heavy boxes, lots of them. Suboptimal. Getting rid of stuff is imperative! If You’re so inclined, You’ll find sloppy teardowns of 3 devices below. Mostly images and a bit of video footage at the end.
Expectations. When buying a cheap device, I don’t expect a display with “Retina” quality, but it should still be usable and not something the engineers who designed it have to be ashamed about. It shouldn’t be a piece of shit … Continue reading
A small but helpful upgrade, if you’re into acquiring your own temperature calibration data. At some undetermined time in the future this might be expanded to a full multi-point calibration mode. The config menu was amended with the parameter ‘display_adc_raw’. … Continue reading
I’m glad to announce that the annoying watchdog issue has finally been fixed. It was a dumb error on my side, combined with a prevalence in some ATmega chips to have certain binary values in uninitialized registers after a cold … Continue reading
I’ve finally forced myself to layout a small board. It’s been far too long anyway. It consists of these building blocks: reference voltage, comparator, RC low-pass, gain. There are better methods for the job, e.g. using a digital one-shot to … Continue reading
This card is pretty good, when it works. Transfer-speeds were fine, close to 100MB/s with an external USB3 disk. It works nicely with Linux – plug and play. Then the problems started…
Yes, yet another power-supply failure!
This firmware for the ISML + HC-05 Bluetooth module currently implements the same simple interface as the current WiFi-code named ‘browser_control’.
Pairing the ‘HC-05’on linux using the command line (openSUSE 13.2): When first powered on, the HC-05 module will … Continue reading
Behold, the stickers of DOOM… If you should find any of these on a shipment to you, prepare for battle!
I ordered a couple of WS2812B on Aliexpress more than THREE months ago. Boy what trouble that has conjured up! The seller on Aliexpress now probably thinks I’m a crook, because I missed an email that asked me to provide … Continue reading
ARGH! I can’t be having with that! I do hope this lamp is a low voltage one…
Purple circuit boards are available on oshpark. $2.30 for a three-pack (free shipping).