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SERPENT II Pit VIPER - PCB DIY (do it yourself) assembling - video clips examples

This is an initial version of the blog post about how to do assembling / soldering of the SERPENT II Pit VIPER DC motor controller/driver. In time this blog post will be modified with additional material like screenshots, explanations, additional examples etc. Currently this blog post provides only video clips related to the soldering process of the DC motor controller. Note: all zilsel-invent video clips are real, without additional video editing and it was taken by Logitech HD720p web camera. Also, you will never hear a fancy mumbo jumbo speaker (announcer), since zilsel-invent is intended for the >makers community< and it will always be like this.

Step #1:SERPENT 2 - Viper, IRF3710 Power MOSFET assembling / soldering.


Step #2:SERPENT 2 - Viper, rectifier diodes assembling / soldering.


Step #3:SERPENT 2 - Viper, male pin header connectors assembling / soldering.


Step #4:SERPENT 2 - Viper, blue signal LEDs assembling / soldering.


Step #5:SERPENT 2 - Viper, blue screw connectors…

Electrolytic capacitors and design rules

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This article is intended to explain the bases about electrolytic capacitor, where they are used, basic construction, RLC circuit and much more. This is a first article about capacitors and this article is based on zilsel-invent previous article about low pass filters at the following link: Low pass filter and voltage stabilization

Electrolytic capacitors and design rules
The figure #2 presents already used electrolytic capacitors. As we can see electrolytic capacitor is polarized device which means that it is important to pay attention during capacitor assembling to the PCB (printed circuit board). Depending on the capacitor manufactures, in some cases negative lead is marked with a negative sign, and in some cases positive lead (capacitor pin) is marked with a plus sign. Beside polarization mark, there are also labels about capacitance (for example 470 microfarads) and maximum allowed voltage (for example 10V). The maximum allowed voltage is important parameter regarding electronic dev…

Triangular oscillator - Operational amplifier slew rate - IV part

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The fourth article in series about triangular oscillator is intended to explain operational amplifier slew rate parameter since it is important parameter when you are dealing with signal generators like it is square wave signal generator. Op amps are not ideal as any other components, and it is important to know how to choose right operational amplifier for signal generator applications.
Slew rate
Operational amplifiers are not ideal components as any other electronic components and/or devices, there are a lot of different op amps designed with different slew rate value as it is presented on Figure #1. Slew rate is the parameter which determines how fast operational amplifier is able to change output signal/voltage regarding input voltage changes. The higher the slew rate value means faster operational amplifier and vice versa. Internally, operational amplifier slew rate parameter depends on the compensation capacitance Cc, very small amount of integrated capacitance (here you can ask y…