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Old Yesterday, 02:01 PM
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wrathofkhan's Avatar
Los Angeles, California
Joined Jun 2006
412 Posts
Help!
How can I reduce voltage - from 5V to 4V?

Hello

Straight up, I do not know much about electronics, beside some simple soldering

for my project, I am using a Castle ESC/10, where the BEC output is 5.0V (at the lowest setting). I need to drop it down to 4volts, otherwise the tiny servos I am using will burn up since they are rated at 4.2V

How can I do the voltage drop? Advice, link would be very much appreciated. Thank you in advance ... Khan
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Last edited by wrathofkhan; Yesterday at 02:13 PM.
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Old Yesterday, 02:37 PM
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Joined Nov 2012
200 Posts
use diode, but check the max current first

there are some with 1A that i used, by connecting few in parallel you may use more current, they MUST be the same diode

use only 80% of the max current of your diode
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Old Yesterday, 04:01 PM
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wrathofkhan's Avatar
Los Angeles, California
Joined Jun 2006
412 Posts
thank you for your post ! do you have any suggestion on which diode to buy, i have no clue what so ever

i was planning on using it on a tiny servo: Spektrum H20240L 2.9 Gram Linear Long Throw Cyclic Servo (130 X)

Specifications:
Size Category: Specialty
Type: Analog
Application: Ultra-micro helicopter, cyclic
Torque: 11.6 oz (329 g) force
Speed: 0.13 sec end-to-end
Length: 0.9 in (24mm)
Width: 0.7 in (19mm)
Height: 0.4 in (9mm)
Weight: 0.1 oz (2.9 g)
Bushing Or Bearing: Bearing
Bearing: Single
Motor Type: Brushed
Connector Type: JST-SHR 1.0mm
Gear Type: Nylon
Voltage: 3.2 - 4.2V
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