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Recent content by djdaga

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    [PIC] Interactive simulation

    Greetings I am finding Greetings. I'm looking for a tool similar to the one in the video. The idea is to see how a microcontroller works inside, the data as it travels through the bus, the program counter, the memory.... Clearly, I don't want a simulator as a proteus...
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    Home phone through gsm

    Greetings. I wanted to hack this week. I want to become a kind of "gsm gateway"?. For example I have a gsm module (or it could be a cell phone with android), I have a home phone... The idea is that I want to dial from my home phone and walk out through the GSM module. I understand that the...
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    [SOLVED] Ferrite toroids cores DIY

    I've been doing research on how to make E-I cores for transformers, toroids... I have iron oxide and zinc oxide handy. At the moment I am solving the chemistry for agglutination and baking. The mold and shape of the cores is no problem for me. But here a doubt arises. How do you calculate...
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    [SOLVED] Noise and inproving electret preamplifier

    Ño is the 20k resistor for the micro... 13k is other.
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    [SOLVED] Noise and inproving electret preamplifier

    Greetings. I followed everyone's suggestions, facts and considerations. I did some tests and ended up doing the "Single-Supply, Electret Microphone Pre-Amplifier of John Caldwell"... Very good results. I decided to set a potentiometer to avoid the tangling with the resistors, which I don't...
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    [SOLVED] Noise and inproving electret preamplifier

    Hi!. I'm going to run some tests and let you know.
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    [SOLVED] Noise and inproving electret preamplifier

    Sorry. Pleas see the image.
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    [SOLVED] Noise and inproving electret preamplifier

    Greetings. I made this little preamplifier for electret microphone, but I have a problem. Sometimes background noise is quite annoying, as well as high frequency noise (aka the sssssssssssssss). I've worked with some filters and software level and I don't get acceptable results. The microphone...
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    Smart charger for deep cycle battery (12V 145AH) and microcontroller

    Greetings. Well I agree with you and KlausSt, I've read the matter a little bit on https://batteryuniversity.com. I'm clearer, though there are some doubts. The truth is that now, I am working on two fronts. I'm making the power regulator for operationals, as well as two circuits for the control...
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    Smart charger for deep cycle battery (12V 145AH) and microcontroller

    I have a transformer (40A in the secondary) and a rectification stage (18V DC). Everything's fine. I have a circuit with an operational and a mosfet, as shown in the photo. The operational with 5V input, and a 14.6V-14.9V output, to control the mosfet. The image is for reference only, the values...

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