Nothing good can come from a freak idea after mi…..
Wait!
This time I actually learned something, or in more pleasant words: I was reminded that there was something about floating power supplies, measuring voltages and something called ‘common ground’. Only I don’t remember ever being taught that it can hurt too.
Here’s what I did:
I plugged an [...]
robert Electronics., Fix me. GND, measurement
Maybe you remember my last post about the Jyetech oscilloscope and it’s weird behaviour. Not all of them are strange, as the free replacement DIY KIT I received from them works fine. At that time I suspected a sick ATmega64 cpu and had all sorts of plans to detect what components might be bad.
Long story [...]
robert DIY., Electronics., Fix me. AVR, ChipQuik, desoldering, DSO, jyetech, rework, seeedstudio, SMD, soldering
Nothing good can come from a freak idea after midnight !
I was tired and should have gone to bed. But when I get too tired I can’t fall asleep anymore and turn into a zombie, looking for something stupid to do. Sadly at that time my idea seemed brilliant.
So I started testing how low [...]
robert Arduino., Electronics., Fix me., PCBs 'n stuff. ChipQuik, desoldering, rework, SMD, soldering
The symptoms since a firmware upgrade (and downgrades, re-upgrades…):
strange characters on the display for SEC/DIV
system freezes
+/- buttons are ignored (but still work physically)
the ADC chip doesn’t get a CLK signal during a freeze
My theory:
The ATmega64-16AU is overclocked to 20MHz, which is a good reason for failure. But all the other KITs seem to work, so [...]
robert DIY., Electronics., Fix me. AVR, DSO, jyetech, seeedstudio, soldering
I bought the DIY KIT at seeedstudio recently, as I needed to feed my soldering obsession. Here are some images of the KIT coming right out of the box:
I had to use my milling machine, because the front panel cutout for the LCD was too small. Oh and DON’T [...]
robert DIY., Electronics., Fix me. AVR, DSO, jyetech, seeedstudio, soldering
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