Recently I found a broken HP elitebook 820 in the electronics junk at work. The notebook was already cannibalized for parts but the display still looked good.
I needed to make an AV-Cable for a monitor but the vendor did not supply an appropriate cable so I had to make my own cable.
I got myself a Feelworld Field monitor since I want to improve my Youtube video game a bit.
But first I needed to build a AV Cable to connect my Olympus Pen camera to the (legacy) 3,5mm, 4 ring AV jack of the FW597 since olympus Pen camera do not support live video HDMI output.
Long story short, the pinout:
2, Video in
3, Right audio channel
4, Left audio channel
(1 being the ring at the base of the plug and 4 the tip of the plug.)
(This is the English language version of this posting: EVF)
What is this all about? Many old video camera (VHS era) are equipped with tiny black and white CRT screens as viewfinders. It is exactly these this posting is about. Many of them can be hooked up to a BAS or FBAS (Yellow RCA connector). Such as CCTV cameras or a Raspberry Pi to be used as a tiny screen or with the magnifying viewfinder assembly you can put it close to your eye and have a much larger image.
I took an X-Ray and photos of the front and back of a GeForce 6800 GT graphics card.
A photo of the front of the graphics card in comparison with an X-Ray of the same spot.
A few years ago the elevator in my apartment building was replaced. The changed the motor, the controls and the cabin.
I could not resist and salvaged some parts of the control. Among other parts I saved the electric contactor switching the motor. Here are some Pictures. Continue reading Old electric contactor from an elevator
My tablet has some issues, so I took it to the doc. to have it X-Rayed. Note the different image contrast across the voltage range.
I found a crate with old Hewlett Packard PCB in the storage. It’s sad enough that they sit in storage so I thought I share some pictures of them. I think it’s interesting to see how they where designed back in the day. Continue reading Some old but interesting circuit boards from HP
I bought this “DC 3.6v-6v to 400kV Boost Step-up Pulse Power Module High-voltage Generator” thingy from on ebay thinking it’s total crap since the description is nonsense. Stating it can deliver 200kV and also stating it can deliver 400-600kV but no even mentioning the polarity of the input. It was only $3.95 (including shipping) so I bought it anyway.
Of course it can’t generate Voltages nowhere near to 600kV or even 200kV but HELLO! It puts out enough voltage for some nice sparks. I’m still looking for a volunteer to test the how these sparks feel :D