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Joined 1 year ago
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Cake day: June 30th, 2023

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  • Look at mister fancy pants with and assembler.

    How about entering straight opcode, operand with only a hex keypad and two pairs of 7 segment LEDs. You can only see one set of numbers at a time. You had to write it out on paper to be able to keep track and count positions so you don’t use your spot.

    I had to do this as a project in school. Two 8088 units that we breadboarded to a UART that we used to drive a fiber optic link to communicate with each other with a basic protocol. All descrete components hand wired and coded.

    It made you tie all of skills together into a full system of hardware and software.






  • I am old enough to remember when they only had manual screw drivers and thicker wood screws that needed to be pre-drilled and lubed with soap.

    Go buy a modern “cheap” wood screw. Not a deck screw. An actual wood screw. Pre-drill the correct size hole, including the countersink, and use the correct size manual Phillips screwdriver. You will never strip out the screws.

    Now take a 500 RPM impact driver that has almost enough torque to remove lug nuts, a worn or wrong size bit, and a thin shank screw that was only designed to hold down deck boards and the slightest slip or misalignment and have this photo.

    We all do it because it is fast/easy. Just understand that you are doing things the convenient way instead of the right way, and you have to expect the stuff to sometimes not work aa advertised because of it.









  • UPS batteries are really dangerous because you cannot turn them off. They are also high enough voltage and current to harm you through arc flash and burns.

    The other thing with small UPS batteries is that there are usually multiple batteries. There are fuses between the battery string and the circuit board but not between each battery in the string.

    OP may have connected batteries wrong or he put a new battery in a string with a shorted/dead battery.

    Whenever you are going to string multiple batteries together always disconnect batteries and check voltage on each separate battery to make sure that they are the same or very close in voltage. If different charge to the same level. Any difference in voltage between the cells will cause current flow that can cause a fire hazard.