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The capacitor discharge resistor is a 2200 Ohm 3W resistor, which is sized for a max input voltage of 400V. This is adequate to work on standard switching mode power supplies. Notice that if you look at the datasheet for the 1N4007 diode you will see a rated forward voltage of 1 V, so one may think that two diodes will be enough to turn on the LED.
I used a klein tools MM2000 and a Klein tools CL1000 most fluke meters have these same settings. This video demonstrates how to discharge and test a capacitor. The capacitor is a commonly replaced part for a motor or compressor that won't start.
Related Tools. Parallel Resistance Calculator. The charging/discharging property of a capacitor made a lot of applications in electrical engineering possible. The charging and discharging of the capacitor means it would not allow rapid voltage spikes that would otherwise harm appliances and...
Aging Calculator For Ceramic Capacitors. FIT Tool for Predicting Capacitor Reliability. KEMET's extensive portfolio of capacitors covers 96% of all dielectric options available that find usage in automotive For high energy storage applications, offering rapid charging/discharging within seconds.
Constructing a Capacitor Discharge Tool Construction of a capacitor discharge tool is straight forward and involves only soldering a couple of components together and protecting them in some way. Shown below are two approaches, but any type of protective cover or housing is suitable.
The discharge time for each decoupling capacitor can be controlled using a series resistance to set the RC time constant. This enables the sequencer to turn off each POL after a known time delay following deactivation of the previous converter in the sequence.
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Safely drain the capacitive charge after the circuit is de-energized. Optional resistor available to limit discharge current. Capacitor Discharge Tool Includes: 24″ 1-1/4″ O.D. electrically tested (ASTM F-711) fiberglass pole with hand guard; 1/4″ stainless steel hook with 1-3/8″ opening