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    Capacitor charging circuit

    Constant current....
  2. B

    Why amp is not stable while charging a 3s battery

    By amp I think the Op means the charge current......:cool:
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    Enable a RGB LED with a single transistor)

    After the above, then show this......
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    ESP8266 for controlling selenoid door lock

    If you look, I think you'll see that Elvis has left the building...... :oops:
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    What transistor is this?

    Can we see this "similar labelling" ...??
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    What transistor is this?

    So............... how did you arrive at the fact that this is the same device? Case outlines mean nothing......
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    Who Here is into Arduino & Raspberry Pi. Are You Also Serious About Electronics?

    Then it's a motor....:rolleyes:
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    12 v fridge controllers

    Reason being, the system that was introduced back in 1930's. i.e. non-repairable items, chuck away, keeps the economy flowing. Good luck trying to fix any of those boards. Even if you can narrow down the offending device, chances are it is an oem product ...... i.e. not available or...
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    Wanted: Samsung Refrigerator Parts

    Plenty of refrigerator off-market suppliers online. Look up your model and see what they have. If not listed, then usually unavailable anywhere.
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    What transistor is this?

    Doesn't look burnt.....
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    Issues with replacing Dead Laptop Motherboard...

    All that means is they ripped it out of a (hopefully tested and working) laptop. Doing any repairs on these old machines is iffy at best. For one thing, they were never made to be repaired.
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    CD4001 LED flasher circuit help

    Draw a pencil sketch circuit diagram and include any power supply you are using. These "fritzing type" displays are next to useless.
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    4AA Battery Pack alternative?

    If the 5V in the above is not quite enough, add a small boost converter to the powerbank output and adjust to required level. Boost converter size naturally selected to suit whatever load you have. Most smaller ones are 2A standard. These are a bit over 1A depending on output set.......around...
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    Fridge compressor test....

    Electrics or mechanical...??
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    4AA Battery Pack alternative?

    One would need to know what the requirements of each "robot " circuit is. However it would or could be a little dangerous using LiPos around kids given the recharging requirements and other safety concerns. Perhaps AA size NiMh would suit better as they can come with a suitable charger and...
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    Are Deoxit contact cleaners worth the money?

    Worked just fine in the water resources commission for 50 years.
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    Super Simple Home PCB Design Software

    There are plenty of free ones. What might be considered "simple" to one may be "uphill" for another so it largely depends on how you are at learning new stuff. It might be noted that rolling your own is pretty much gone out the window these days given the speed,low cost and excellent quality of...
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    Stepper motor control duty cycle with Arduino

    Spec sheet should contain all relevant details.
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    Controlling the speed of my servo

    M, that will manually control the speed (position) but automatic slow motion of the servo such as in gear retract from "open to closed or visa versa" requires the movement from 1 to 2 milliseconds (or whatever range required) be done in small increments. For example, first send 1.0 then 1.05...
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    Pioneer VSX-D701S Voltage Selector Bypass

    From 1 manual I found, there seems to be a requirement for BOTH the slide switch AND the rotary switch to be in the correct range. So for 110v operation for starters, the slide switch needs to be in the upper position which is the 110, 120 and 127v position. Then the rotary switch needs to be...
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