Top new questions this week:
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I was watching this video by Ben Eater on building an 8-bit computer: Youtube Video time: 1:51. He has this circuit: Right before the 74LS245 he has 8 LEDs in parallel with the 74lS245 IC. I am a …
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I’m building an analog distortion effect for my guitar. During testing I measured a random 470 kHz signal with an amplitude of 500 mV. Where does this signal come from, and how do I get rid of it? I …
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I am an experienced C programmer trying to learn enough Verilog to create a brushless motor controller. I am nearly done except for one detail. I want to do something like this: …
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I need to buy a 110 V to 110 V isolation transformer to isolate a device from mains, but I can only find 220 V to 110 V or 220 V to 220 V. Can I use a 220 V to 220 V transformer for 110 V to 110 V? …
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Forgive me if this question is a duplicate, I looked around but did not see anything that quite fit. The scenario: I found a box of old FM receivers, the kinds used (I think) for assistive listening …
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Attached is a picture of the keyboard controller from a 1985 IBM 6770 typewriter which I’m working on. None of the chip numbers make any sense. The manufacturer prefix don’t match the manufacturer …
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The capacitance of two ceramic capacitors were measured using an LCR meter (Agilent E4980A) at 1 kHz. The measured capacitance values of 100 pF and 100 nF capacitors are shown below. The value of 100 …
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Greatest hits from previous weeks:
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On a printed circuit board, I see lots of tiny letters and numbers. Is there some kind of standard that dictates what letter indicates what type of component?
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What do solid or dashed lines on a wire indicate? Is there a difference between the solid and dashed indicators?
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I would like to know how the mechanical rotor frequency [Hz] can be obtained from the electrical stator frequency [Hz]? This is no homework! I have consulted several books as well as the web but could …
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Spring cleaning, and I’m trying to get power supplies for all my devices with missing power supplies. They’re all the typical barrel power connector, and I’m having a dickens of a time trying to …
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How can I save data retrieved from a sensor to a text file on the computer?
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So this seem like a simple question, but I’m trying to flip components in the schematic editor. If I select a component then use the keyboard shortcut X or Y, it brings up a menu and does not slip the …
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Can someone please explain the how grounding / earthing to prevent a person from getting electrical shock using simple illustration of a faulty electric iron connected to the 240VAC mains? I don’t …
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Can you answer these questions?
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I have been designing a BLDC controller using IR2101 gate drivers to control high/low MOSFETs. Please see schematics below. After soldering everything on and testing circuits, I am not getting the …
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I am working on a project that involves using isolated DC/DC converters to power gate driver ICs that will then switch on/off IGBTs. I have 9 DC/DC converters that will power 9 gate drivers each that …
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Like this: model EFUSE_MODEL ( input PG_MODE, … ); … buf (pg_mode_buf, PG_MODE); // the body of this model uses pg_mode_buf only
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