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  1. K

    Using this magnetic sensor as a wakeup sensor

    for the rest of the circuit. Here is the sensor's datasheet However, looking at the diagram of interest makes me think this is going to drain the batteries quite fast due to that LMV324N comparator and its voltage divider on the positive terminal. Is there any way to tweak this design for...
  2. K

    in-car (passenger) electronic device use: resonance vibration natural frequency

    Hi, I have this smallish gadget that I want to use inside my diesel engine car. It is mostly going to sit somewhere inside the car for the most part, and I am considering vibrations. The PCB is under 100 g / 4 oz and about 45 x 50 mm / 1.8 x 2 in. From what I read this makes for a low mass...
  3. K

    Regular power in fries it, SPI power in sails it

    Made my first PCB, yay! a MCU and a RF transmitter mainly. Programmed it OK through the SPI interface (which has a power pin feeding it stable 3.3V). All worked fine. The circuit is intended to run off its currents at 12V obtained from a car lighter socket. So I have soldered the car plug...
  4. K

    TV set - I have broken it

    I have unscrewed its back cover, done my work with it (TV working ok), then placed the cover and screwed it back in again; there was some rocking involved in the process. TV working not OK any longer. Aside for what can be seen in the video it also goes black for brief periods. And this is not...
  5. K

    graphics card VRAM replace

    Hello, One (ore more) of my graphics card's VRAM has gone bad. Took out the card to only baffle on the VRAM chips being ... unreplaceable ? The VRAM seem to be facing up on both sides of the video card. I can't see their pins... Help!
  6. K

    jittery mouse fix

    Hi, I have this Genius Navigator 535 mouse that jitters as I move it. The higher the DPI the more the jitter. Rubbed its lens clean, used it on two machines and 5 OSes, even with custom made drivers for it. all the same - so I am pretty sure this is a hardware issue. That being said, I have...
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