Orientation switch
Orientation switch
Clock's PCB
Clock's LCD
Old shunt resistor
A new clock ;-)
Dead RGB LED
All fixed with SUGRU
Sugru blob 1
Kneading a bit of Sugru
Quick fix with some Sugru
Time for cleaning... again!
Bike damaged by my heavy U-lock
Bike damaged by my heavy U-lock
Sugru blob 2
Defective PCB - back side
Defective PCB - front side
A couple hours of soldering
A strange game...
Weller WSM 1 - soldering pencil
Weller WSM 1 - soldering stand
Weller WSM 1 - soldering pencil
Weller WSM 1 - soldering pencil
EEVBLOG stream harassed by vuvuzelas ;-)
An Admin's nightmare
SUGRU super pack
SUGRU super pack
The beginning of Escargot
Fachhochschule Jena at night
An Elevator
My VW's reading light - inside
My VW's reading light
LED warner V1
LED warner V1
LED warner V2
The battery mauling reading light
LED warner in action
Unholy relay wiring
My digital power supply
Overheated shunt resistor
Overheated shunt resistor
Overheated shunt resistor
Removing a relay
Digital power supply
Bad solder job
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Digi 35 CPU - new shunt resistor


I couldn't get hold of a precision shunt resistor, so I had to do with this 10% 5W one here. It didn't turn out too bad at all. This one doesn't affect the current displayed on the power supply's display (the display measures the current itself), but the current set-point in the opamp feedback loop. I have a schematic, but it is not quite matching the PCB revision I have, so I couldn't instantly figure out which pot to tweak to compensate for small deviations. Reverse engineering a schematic from a given PCB sucks.
I compared the current set on the power supply (via a keypad) and the current measured by a good multimeter and it wasn't off by more than 5% worst case. That's good enough for me right now.
I compared the current set on the power supply (via a keypad) and the current measured by a good multimeter and it wasn't off by more than 5% worst case. That's good enough for me right now.
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