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Recent content by BrunoARG

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    Building a 12Vdc to 120VAC converter

    It's a very simple circuit, but I wouldn't be that quiet. Transient periods will generate huge losses between both transistors of each driver. The square wave goes from 0 to 12V (aprox.) in a very short period of time, when the signal will take every voltage value between these given two...
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    Building a 12Vdc to 120VAC converter

    Not enough information, you should be more specific and more people will understand your question, so higher chances of being helped. I assume you want to generate a 120V 60Hz sine wave signal. How much power are you planning to use? I think TL494 won't fit in your application, as its main use...
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    Overcurrent and precharge circuits

    Re: Precharge circuit design considerations You are not giving enough information... No wonder if nobody answers your question.
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    Inefficiencies in Hardware Bring-up Discussion

    Hello, I use KiCAD and I have designed several medium complexity PCBs. The most annoying part when designing the PCB layout is the size and the position of connectors, mounting holes and pots/switches/LEDs, etc. when you haven't a defined enclosure. It's obvious but I had to mention it, because...
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    [SOLVED] AMD or Intel for engineering PC?

    Thank you for your responses. Finally I got an Intel I5 7200U. Running with a sataIII SSD disk and Windows 10 64 bit, I have a really good experience, very fast response and 20 seconds to boot. When I use VM for Linux the RAM fills up to nearly 70%, glad I bought the 8GB version PC. It's been...
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    [SOLVED] AMD or Intel for engineering PC?

    So, do you think it's worth to buy a laptop with AMD and dedicated graphics card? It's in the same price range as the one I was talking about, but again, I mean, these laptops are designed for gaming, will they work fine for office and engineering tasks? And another one: Do you think changing...
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    [SOLVED] AMD or Intel for engineering PC?

    yeah, I was actually thinking about moving to Linux, but are most programs compatible? I know that maybe 10 years ago most programs would have trouble in Linux, if they were even developed for it, how's the scenario nowadays? I know all the electronics programs I use are available in Linux and...
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    [SOLVED] AMD or Intel for engineering PC?

    Thank you for your answers. So intel are more reliable in long terms of time, I understand. AMD is often more frequently seen in gamer PCs so they must be designed for that use; graphics the most, they actually have more internal GPU speed. Another question: Do you recommend me to install...
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    [SOLVED] AMD or Intel for engineering PC?

    Hello everyone. I have been searching in several PC/gaming forums and I didn't get my answer, and this forum is the most addecuate to, so: AMD or Intel? I want to buy a new laptop for working in my engineering projects, I work mostly in electronics (Simulations with LTSpice, Matlab/octave, PCB...
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    Hum with single-to-split power supply for the equalizer.

    Re: Hum with single-to-split power supply for equalizer. Well, actually it wasn't so necessary, but as I didn't have time to test the 2 resistor virtual ground, I just put the transistors to assure low impedance, which I think is good to avoid noise in the supply. But it works pretty well, and...
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    Hum with single-to-split power supply for the equalizer.

    Re: Hum with single-to-split power supply for equalizer. Well, finally I got some time with my amplifier close to the oscilloscope so I said "hey it's a good time to measure its signals and supply" so I did. I found out the problem: First, the output signal (from equalizer) was a VCC/2 with...
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    Over Voltage Protection not working with load when it draws more current

    Exactly. I would recommend 1K and 330nF. It allows fast spikes to go through the supply to the load, but will prevent long-term overvoltages (for example, using a wrong transformer/supply). What's the MOS ON resistance? Maybe with its value and a capacitor, you can calculate a filter these...
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    led mosfet switching

    Oh yes, I read wrong. When someone passes through the barrier, it will put 0V as output. You could use a P-MOS as Klaus says. Another thing to keep in mind: If a person pass trough it, the signal will be 0V only when the light barrier is blocked, which is less than half a second at normal...
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    Board and schematic review (ATTiny85)

    Hi Alex, First of all, it's a good practice (and pretty necessary) to have a topology standard to draw schematics circuits, and it does exist: -Higher potentials up, lower, down. Just like the water falls, from top to bottom. You put all GND in the upper part of each circuit section, it should...
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    led mosfet switching

    Hi mpiepen, I think the circuit you've made is not correct, first of all the transistors polarity, the upper one should be NPN and... BJT? I don't think you have a 4 terminals BJT transistor. How does the light barrier work? When there's an object between emitter and receiver it outputs...

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