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  1. D

    Speaker output ohmage without information.

    Download here - https://annas-archive.org/search?index=&page=1&q=loudspeakers+and+headphones&display=&sort= Regards, Dana.
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    T and/or Gas sensor for fire alarm .... Current sensor for supply monitoring..... Just google "sensors", jillions of hits.
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    Speaker output ohmage without information.

    Some insight into speakers - https://drive.google.com/file/d/1503ED8PpvkjCf5S2kVfNTXz6M0-Vrn6L/view?usp=drive_link
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    Kamal Hinduja : How do I connect a DHT11 temperature sensor to an ESP32 and display the data on a web server?

    To add board support packages and libs, the newer IDE 2.3.6 has icons in left col, here highlighted boards, where you can select ESP8266 or ESP32 to add to the IDE. The icon that looks like "books" just below board is libs for sensors, other tasks, again where you select what you want and...
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    Kamal Hinduja : How do I connect a DHT11 temperature sensor to an ESP32 and display the data on a web server?

    There is a bit of a minefield in Arduino Web Projects. Many will not compile due to latest release changes in IDE. So be mentally prepared to getting workable lib versions for use in project. Many projects dont state particular version of the lib they are using....... One has to get used to...
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    Charging Li Ion batteries.

    LiOn batteries have significant SAFETY ISSUES. I place packs outside, rain protected, to charge using battery recommended charger. Trust from all the LiOn fires I see on news make me very cautious. A properly design charger detects pack T and manages based on that, current and V. So janky...
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    Then use PayPal ?
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    https://support.arduino.cc/hc/en-us/articles/9350551575964-What-s-the-difference-between-UNO-R3-and-UNO-R4-boards
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    I have been using them for > 5 years now, I give them a 4.8 out of 5 rating. Purchsed everything from simple jumper wires to instrumentation and had very good results. I also, when looking for price, use aliexpress.com Not necessarily as good a quality as Banggood, eg. soldering on modules...
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    Read the ads carefully but my experience is a flash deal is a one time immeadiate purchase price for whats being shown. Not expert here I think you can open a chat and they can give you a link to the definition of a flash deal. I bought a sensor collection years ago and it was quite low. The...
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    Best Arduino Starter Packaged Kits on Amazon. (also what about "Rasbery Pi"?)

    Consider buying a sensor assortment kit and seperately a UNO board.... https://www.banggood.com/search/arduino-uno.html?from=nav https://www.banggood.com/search/sensor-kit.html?from=nav https://www.banggood.com/search/jumper-kit.html?from=nav...
  12. D

    Basic LED blinker Circuit help

    There are circuits and design discussions in attached books and ap notes for the 555 timer. https://annas-archive.org/search?index=&page=1&q=555+timer&sort= Regards, Dana.
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    110v AC pulse on/off device

    Post on wrong thread, deleted. Regards, Dana.
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    110v AC pulse on/off device

    Something like this - mBlock block config generates code that you use to program small Arduino board. So : 1) Buy Arduino Nano board, its ~ $3 2) Download and install mBlock and Arduino IDE, free. 3) Buy SPDT switch to control input to D5 on Arduino board to switch pin D5 to ground or 3.3V...
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    help with proportional valve 10 to 24v

    So you want to translate 0-10V to 0 - 24V ? A simple OpAmp circuit can manage that. But you need a power interface to the OpAmp I gather, and protection for driving inductive load (the valves) ? This will help calculate basic level translator circuit ...
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    Palasmb for xp software

    https://en.wikipedia.org/wiki/PALASM https://archive.org/search?query=palasm https://bitsavers.org/components/mmi/ https://bitsavers.org/components/mmi/palasm_pleasm/program/
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    Using 2 C005 Timer modules for an on-off timer switch, alternatives for timing, low power?

    Threads I posted prior, so I will respond.
  18. D

    Using 2 C005 Timer modules for an on-off timer switch, alternatives for timing, low power?

    What accuracy goal do you have for your timing, and range of timing needs, hours, minutes, years.... ? Does timer have access to internet to get internet time, then go to sleep ? Do you need xtal controlled accuracy ? Goals for power consumption ? Do you need to debounce mechanical switches...
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    Hacking the op amp...

    If you take a high res pic of top of package, save it as bitmap, we can use photo editing tools to do edge detection and extract the markings on its top, possibly...... Regards, Dana.
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    Traffic

    So anything from one traffic light on to all 3 on ? When a light comes on, a new random value, how long to stay on ? Can you write code, build prototypes ?
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