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  1. B

    Why relay contact stick even when power off?

    Both suggested in #5. :):) Yeah, I know, I don't read all the replies either...... :D:D
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    Interesting circuit usb with 2 led lights with different brightness

    Metal disc is a form of tactile switch. If the underside of the board sports a "black blob of tar like substance" then more likely than not, a microcontroller. There are ways to build up a circuit from discrete components but hey, that's what microcontrollers are for these days. Although you...
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    Induction hubs keeps blowing out fuse

    Without a lot more information, impossible to say. Any explanation is not going to help you though as you obviously have very little electrical knowledge and it would really be a waste of time explaining.
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    Why relay contact stick even when power off?

    Change to a decent size relay perhaps a 10A rated. If you find it's arcing that is causing the problem, there is a small circuit addition as shown in this video below. Guess you will never know if the relay is completely blacked out as are current ones.
  5. B

    Make a flow switch from a hall-effect flow meter

    Driving a relay in that manner, the relay will be off during the timeout, then you will need to allow for this with the contacts. Sometimes it's done like this to allow for "fail-safe" but I don't think this would apply in your case. Re-trigger I had more in mind was starting with a oush button...
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    My homemade heating mantle doesn't work properly

    2.7A even worse.
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    Control alternator voltage back to 6vlt battery?

    One cannot charge a 6v battery with only 6v. The daytime (lights off) regulation as can be seen in the diagram supplied is the "running light" called parking or city light and the resistor. What we see in the diagram I would imagine be a lot different from what is actually there in the bike...
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    How is a brass gear removed from a DC motor?

    Forget the heatgun. It will destroy the insulation on the armature if it already hasn't done so..
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    How is a brass gear removed from a DC motor?

    Use a bearing/pulley removal tool such as this .........on a smaller scale obviously A pair of pliers using the "cable cutter" section will work equally well. Jaws sneak in between rear of the gear and the motor. Key to success is a fine enough punch tool to fit inside the gear and suspend...
  10. B

    using software i2c

    Well then I guess you are never to old to learn something new then.:):)
  11. B

    using software i2c

    If you go with Arduino it's as simple as.......just a couple of lines. One explanation here...(can start at around 11.00 if you don't need to know the beginning part)
  12. B

    Make a flow switch from a hall-effect flow meter

    Same here. Wonder if the Op even read about "retrigger 555". I'm still wondering what exactly is required. The explanation from the first post does not match that from the latter. Is this "water flow sensor" somehow connected into the control of the water flow? so in between the timer...
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    Magnet as workbench swarf-sweeper, and compass

    Wrap the magnet in a rag, works for me for many years ( and I'm an old bloke).
  14. B

    Make a flow switch from a hall-effect flow meter

    Could be done with discrete components but when you start to get into if and then what if scenarios , you might be better off using an Arduino and state machine logic. If you used a simple "start-stop" arrangement as many motor starters have, then once the unit dropped out, you would have to...
  15. B

    Make a flow switch from a hall-effect flow meter

    https://www.dummies.com/programming/electronics/components/electronics-components-how-the-555-timer-chip-works/
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    Advice about MC34063 based buck converter diagram

    You could be sweating over nothing here. All the Arduino I've ever worked with will take 12V comfortably on the RAW input, no need for any converter. Think you are a bit off with the current consumption of the Arduino. The 328 draws maybe 25mA...
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    Technical Name For Pellet Diode in Battery Charger

    There ya go....:):) ...point proved
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    Yl90l-2 wiring

    Could be input or output connections but who knows. No photos, no details as to model, make, nothing. If it is blowing fuses it could be any number of issues and knowing what u1,w1 and z1 are is not going to help you I'm afraid. My crystal ball has flat batteries and probably everyone else's also.
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    how to determine the right voltage for led lamp?

    ahhh....no we can't. Did you even look at the photo you took. It is just a bright overwhelming flash where zero detail is visible. Blowed if I can see any "white dots" except for the previous flash that made my eyes kinda wonky. :eek:o_O Here's an idea....why don't you simply post a link to...
  20. B

    Make a flow switch from a hall-effect flow meter

    2 pulses per second re-trigger would be plenty if your 555 time-up period is more than 0.5 second. You naturally would have to make allowance for any start-up time in the whole design.
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