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    Not Understanding Arduino useage versus traditional Electronics useage in Devices.

    Arduino and similar microcontroller platforms have dramatically shifted how makers and engineers approach hardware projects. What once required deep knowledge of analog components and discrete ICs can now often be achieved through clever use of software and high-level libraries. The "dividing...
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    What tool do I need?

    The best way to solder is to use a Temperature-Controlled Soldering Station. For example, Hakko FX-888D, Weller WE1010NA, TS100 / TS80P etc. These heat up quickly and stay hot. Temperature is adjustable (ideal range: 320°C–400°C, depending on the job). High thermal mass tips don’t struggle with...
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    help with proportional valve 10 to 24v

    You can buy a Ready-Made Proportional Valve Driver. Look for drivers like Bosch Rexroth VT-VRPA1-537-10/V0/0, Parker PWD00A-400 or Sun Hydraulics DVC series. These accept a 0–10V input and control current or voltage for proportional valves powered by 24V. You wire 24V to the driver, 0–10V to the...
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    How can I use an on-grid solar inverter in an off-grid setup using a pure sine wave inverter as a simulated grid?

    On-grid inverters are not designed to share power with another inverter; they are designed to push power onto a stiff grid. If your loads draw less than the solar generation, the on-grid inverter will backfeed into the battery inverter, potentially damaging it. Battery inverter must be...
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    If I was a smart Electronicsy kind of person I would be interested in this!

    Hello, do you need any help?
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    Optimizing Solder Mask

    Hey everyone, I’ve been refining my PCB designs and recently came across this article: What is solder mask?. It provides a good overview of solder mask functions, types, and application processes, but I still have some questions about best practices for high-density layouts. For fine-pitch...
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    Schematic Help

    Please take a multimeter and test the board against your schematic. Test all the pins of the 4017. Test all the lines between the 4017 and the resistors one by one. That will reveal, which pin is missing the resistor. And by the way, did you simulate the circuit before making the board? I...
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    Problem to turn on and of sensors.

    I think your power supply is not supplying enough voltage and current to your setup when you combine BMP280 and SDC40.
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    question lcd led ips

    Liquid crystals can settle over time, leading to slow response times or "sticking," where they may not properly change state when powered on after years of inactivity. Turn on the device occasionally (every few months) to keep the liquid crystals active.
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    Archaeological tools

    You may find these helpful. https://hackaday.com/2020/10/22/affordable-ground-penetrating-radar https://www.sciencing.com/homemade-ground-penetrating-radar-8308662
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    LiFePo4 100 AH battery charger

    You can check this out. https://www.eco-worthy.com/products/5a-12v-automatic-smart-battery-charger-and-maintainer-with-lcd-display-for-lead-acid-and-lithium-lifepo4-batteries
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    Delay Circuit

    If you need picosecond-level precision, you might need an FPGA with dedicated delay elements or an external delay IC.
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    Halogen Bulbs

    JTT and JDD bulbs are not exactly the same. JTT (Japan Tubular Tungsten) bulbs have quartz or glass envelopes for high-temperature resistance. JDD (Japan Double-Dome) bulbs are also tungsten filament bulbs.They have an additional outer glass envelope to help improve safety by containing...
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    Fixing the Circuit for a DC Motor with Rechargeable battery?

    If you have a multimeter, please test the circuit with your meter. Measure the battery voltage without the charger. Measure it with the charger. Inspect solder joints, especially on the battery terminals and LED circuit. Test if there is a broken trace in the board. Look for burned or cracked...
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    LifeFitness T3 treadmill "Motor Comm Error" simple fix.

    Thanks for sharing. Treadmills often seems to be beyond repair.
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    Component acquisition for hobbyists?

    Not all alliexpress sellers are dependable. You have to choose carefully. Check their ratings before you place an order.
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    The Laugh Machine :D

    You need a recorder IC. One way is to use a GROVE sound recorder and Arduino. https://wiki.seeedstudio.com/Grove-Sound_Recorder/ You can use a recording and playback circuit if you don't want to code. https://www.elprocus.com/voice-recording-and-playback-circuit/
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    LED lamp goes "poof"

    You already have many insightful observations regarding your attached circuit diagram. I hope you'll fix the lamp soon. However, if you want to make a portable LED lamp by yourself, you can find these sources helpful. https://www.pcbway.com/project/shareproject/dimmable_LED_lamp.html
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    Can I reprogram a White Noise Machine

    Try to read the chip with an SPI flash programmer.
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    Treadmill motor controller board

    Use a multimeter to check if there’s any voltage present on the 'Relay enable' input pin relative to the ground. If there’s a small voltage (e.g., 5V or 12V), the input might need to be pulled high. If it’s at 0V, it may need to be pulled to ground.
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