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  1. D

    Project help request: Striking a bell manually, alarm clock.

    One way would be to get your time from the internet using a ESP8266 or ESP32. Consider using Tuniot, a block programming language, where you drag and drop functional blocks and Tuniot generates Arduino code to program into chip. Can you code, such as C or Basic ? Regards, Dana.
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    Check individual cells of a car battery.

    I have used a mix of the following and gotten decent results : 1) HV pulser, this I have used most often, and produces significant recovery. Most of the time. 2) Epsom salts (got this from YouTube), very good result on one battery, not so much on another. On YouTube : 1) Flush, apparently...
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    Standards....

    Regards, Dana.
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    Deriving formulas for calculating the errors that occur in the measurement circuit with a two-wire and three-wire resistance thermometer scheme

    Some ref material : https://download.tek.com/document/LowLevelHandbook_7Ed.pdf And attached. Regards, Dana.
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    Check individual cells of a car battery.

    Quite a few DIY repairs on YouTube.... Regards, Dana.
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    UPS circuit IC

    If you have a high res camera you can potentially take a pic, then use a photo editing kind of software to do edge detection or play with brightnes/contrast. Alternatively a well lit inspection microscope works well. Regards, Dana.
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    Siren circuit

    Post a schematic so we can give you more complete and accurate advice. Regards, Dana.
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    Transistor limiting current

    No, more Ib current = more Ic collector current. Look at the graph prior. But as you keep raising base current at some point you will drive Vce into saturation, and in sat the Vce no longer changes much, hence the Vload V will no longer change much, and the current stops changing in the...
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    74LS161 driven by MX045HS

    Another way of doing this : https://hackaday.com/2015/12/27/psoc-vga-on-a-10-development-board/ Regards, Dana.
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    74LS161 driven by MX045HS

    What is actual goal, just to generate a low freq clock ? If so what is the freq of the clock you are trying to get ? If interested I can show you info on a programmable part, no code needs to be written, that can do this all on one chip. Including routing internal between cntrs and out to...
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    Transistor limiting current

    As you can see below primary determinant of Ic and Ie is base current. Regards, Dana.
  12. D

    74LS161 driven by MX045HS

    What is frequency out of the MX045HS ? What other signals does the Arduino apply to the 74LS161 ? Besides clock ? Regards, Dana.
  13. D

    Generac Smart Management Module Dead

    Possible electrolytic cap failure. If its bulged at top a clue : Regards, Dana.
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    whats is proper name for this , heat sensor? temperature thermostat?

    Guessing its a thermocouple. What resistance doe it read at room temperature, if you have a volt ohmmeter to measure ? Regards, Dana.
  15. D

    Need Help regarding the decade counter

    Some questions : 1) What is clock rate from the 555 timer ? 2) What accuracy do you want in your timing ? 3) What pulse width you want for Bn outputs ? Regards, Dana.
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    Help with AMS1117

    PCB Thermal considerations : https://www.ti.com/lit/an/snva183b/snva183b.pdf?ts=1682606805483&ref_url=https%253A%252F%252Fwww.google.com%252F Regards, Dana.
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    doubt wifi and mobile data

    As kellys_eye said no its 99.9% accurate. "Normally" settings are stored in chip flash, and flash has a lifetime write cycle limitation. But that limitation has a very large number of cycles before failure, so you probably will have long upgraded your phone before that ever happens. Regards...
  18. D

    Audio signal conversion

    Does the VU meter board require an offset range V span to accommodate it ? If so this will help, attached. Regards, Dana.
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    How does the operator of a CNC milling machine program the machine and set up the workpiece and cutting tools for a specific job?

    FreeCAD will produce G Code. So you start with FreeCAD, design the object, then export the Gcode. Many will use programs to account for bed leveling in CNC, like Flatcam, which modifies the GCODE by probing the object or cnc bed, then modifying all the GCODE Z axis dimensions. Regards, Dana.
  20. D

    CNC

    Did you not earlier say : For controller card go with a USB interface, most SW these days no longer address the older parallel interface. Regards, Dana.
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