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Hello!
What would be the lightest solution, in terms of weight, to reduce a wire that outputs 5V to 3-4V for a small servo?
Thanks.
Hey tpetar!
To try to be as clear as possible, regarding the servo current draw, here is some data i found, about a servo that is just a little bigger than the one i am talking about:
Current Drain (4.8V): 5.0mA/idle and 130mA no load operating - would that current draw mentioned, double, triple or maybe, only 150% under load?
Hey Kripton2035,
I am a beginner with electronics,
What kind of diodes model are you referring to?
Thanks.
Through the information I am seeing on the second link, I think that the trimpot can do the work.
No that small trimmer cant do the job!!! Power dissipation is high for that trimmer.
Trimmer power is 0,1W and you need 0,196 (200mW) power resistor. After first minute of operation you will see smoke.
Plus trimmer have 200KΩ and you need to adjust 8,7Ω. this is very hard because this is not multiturn trimmer.
But you can use fix resistor if you prefer to play with resistors.
Best regards,
Peter
OK - here are the latest results:
I used 2x 1N4004 diodes, connected one after the other, only to the + wire, and got a voltage reduction, from 5V to 4.06V : is that good??... i mean in terms of having any future problems, in case i did not connect them right, although it seems that the voltage reduction was achieved?? why does this setup reduce voltage? isn't a diode supposed to 'deal' only with the current, not with the voltage, for the purpose of letting the current flow only
Concerning the 4.06V you made mention of, so long as the voltage does not exceed the maximum voltage of your servo then there is no problem.
The reason why there is a voltage reduction by the two diode is that there ia always a voltage drop of approximately 0.5V to 0.7V across each diode and since there are two diodes in series, there is a voltage drop of about 1V to 1.4V (depending on the doping of the diode).
If you are able to find a higher power variable resistor of 10k it will be ok. Concerning the connection, one of the legs should be connected to 5V terminal and the other connected to ground with the middle (wiper) terminal serving as the output.
There is no problem with you asking questions. If you are not cleared you can still ask more.