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Recent content by theskyishigh

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    [SOLVED] trace width to current handling

    I think you implied this in your question, but just to re-iterate there are three things you need to consider when figuring out the current handling capacity of a trace/track. 1) Obviously, the width of the track, measured in mils or mm. 2) The thickness of the copper, measured in ounces per...
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    FatFs and Windows 10

    The generic FatFs used to be compatible with older versions of Windows. Is there any way to use FatFs with Windows 10? I suspect not, but I would really appreciate it if anyone knows how. Thanks in advance to all who take the time to reply.
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    SD Card not showing 4 GB

    Use any partition manager to destroy all the partitions and then format with FAT32. BTW, you need to remember that SD Cards use the K, M, and G conventions, not the IEEE Ki, Mi and Gi. So a 4GB card will be 4,000,000,000 bytes, not 4,294,967,296 bytes (4GiB). If the partition manager doesn't...
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    Need advice on what programming language to learn.

    I have been programming for more than 25 years on C, C++, C#, Basic, Visual Basic, Java, Python, FORTRAN, and COBOL. For what it is worth, a few pieces of advice: 1) IMHO, once you learn any programming language to a decent level of competency, picking up another language is just a matter of a...
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    [SOLVED] ULN2803 as Input Protection

    My bad. I obviously meant ESD protection devices. I am familiar with TVS diodes, but they tend to be expensive, even in bulk. The only ones I know to be remotely affordable are the SMAJ5.0A series. Are there any others you'd recommend (bearing cost in mind)?
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    [SOLVED] ULN2803 as Input Protection

    So, putting all your comments (thank you) together, would you agree that the following would be a better circuit design? - - - Updated - - - What do you mean exactly by true ESD devices?
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    Selection of ICs, Transistors, Power Supply for Big 7-Seg (say 6 inch) for MCU

    I did a similar project recently, except I used MOSFETs to both, sink and source, current. Have a look at the AO3400A (N Channel MOSFET, Min Vgs(th) = 1.05V, Max Id = 4.7A) and the AO3401A (P Channel MOSFET, Vgs(th) = -1V, Max Id = -4.3A). They are small, fast, cheap and robust. Hope this helps.
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    [SOLVED] ULN2803 as Input Protection

    Hello everyone! The ULN2803 is commonly used in MCU projects to drive high-voltage or high-current loads. But I have been thinking about using the ULN2803 as a high voltage input protection device to drive MCU digital input pins. The schematic is attached. Is this possible? Is this feasible...
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    [SOLVED] Disconnected Diode in MC34063A Circuit Heating Up

    Hi, I made a step-down power supply using the MC34063A switching regulator. The configuration was straight out of the datasheet (schematic attached). However, I neglected to connect the anode of a diode to ground on the output pin of the regulator. This diode was burning up. I tried replacing...

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