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R/C Related Electronics DIY DIY R/C Electronics for tinkerers and the budget minded


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Old 06-19-2015, 05:16 PM   #1 (permalink)
 
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Default If you wanted a..........

Hi people of the know!

If you wanted to use a component to allow a slow power feed to a system, what would that be??

For instance a light bulb that starts off dim then comes up to full brightness in a period of time??

Thanks!
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Old 06-22-2015, 08:33 PM   #2 (permalink)
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That really depends, a resistor can control the charge speed of a capacitor bank as long as the voltage and capacitance is known the time to full power can be set. If you add a device that pulls current into the same circuit, calculations become more complex.
You should be able to get a switch (or have it designed) that is operated by a reciever channel, and brings the voltage up slowly it would need to be digital or have a couple pots to control initial resistance and time till full power.
If that becomes a sourcing problem, you could simply attach a servo to a sufficiently powerful volume knob (potentiometer or rheostat) with less than 180 max rotation then use either a knob on your radio to turn it on/up slowly, or use the sequencer found on many higher end radios to create a mix that controls the servo and knob to move how you want it to. They even make a standalone sequencer that can record a series of reciever outputs (1 or more channels) over time and play it back when comanded. I have heard of plankers using such a device to automate aerobatic maneuvers with some success

The possibilities are endless, especially when you have been so vague with what you are wanting to do. I don't know of any one device that can handle such a broad requirement.

If you were to state the problem and detail what you hope to accomplish, I am sure that someone more knowledgeable than myself could offer some assistance.

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Old 10-29-2015, 06:30 PM   #3 (permalink)
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Is this an AC problem? Or a DC problem?

Typical light bulbs are AC (120v or 220v AC). This is a complicated problem.

DC is easier to figure out.

Or, is this not a light bulb, but something else?
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