Blog

Capacitor Leakage Current over Temperature

michaelkellett — Wed, 26 Jun 2019 14:52:49 GMT

I was prompted to do this series of experiments by neuromodulator interesting blog posts. The puzzling thing abut his results is the apparent linking of rate of change of temperature with leakage current. I set up my own test arrangement using a...(read more)

Results and conclusion

neuromodulator — Wed, 19 Jun 2019 22:08:10 GMT

Results: Capacitance temperature dependence The first thing that I wanted to test was how the temperature affects the capacitance of the different capacitors. I performed a temperature sweep from ambient temperature to ~80 °C, and then back to a...(read more)

Introduction and methods

neuromodulator — Wed, 19 Jun 2019 22:07:58 GMT

Introduction Ideal capacitors can be defined with the following simple equation: In this design challenge I will explore parasitic elements of polymer capacitors that are not modeled by the previous equation, in particular I will explore ho...(read more)

more than you expect!

COMPACT — Tue, 11 Jun 2019 09:15:37 GMT

Würth the effort!This challenge is an investigation about the viability of polymer capacitors and their use with vintage electronics.With the Panasonic SMT capacitor portion completed I was still looking for viable Polymer capacitors in through hole ...(read more)

Polymer Capacitors in Vintage Designs - Part #04

COMPACT — Sun, 09 Jun 2019 00:29:40 GMT

LM3940-3.3 Linear Voltage Regulator With Polymer Capacitors The LM3940-3.3 is a linear voltage regulator that whittles down 5V to 3.3V. This part was introduced for the proliferation of 3.3V parts and logic in the early 1990's.At first...(read more)

Polymer Capacitors in Vintage Designs - Part #03

COMPACT — Sun, 09 Jun 2019 00:12:57 GMT

Further Improvements The photo shows the modifications I applied but this would not normally be done as a standard repair.It was purely an experiment applying first principles to improve system stability and reduce EMI. The modifications in...(read more)

Deep Dive into ESR, Application

fmilburn — Thu, 06 Jun 2019 20:59:55 GMT

The element14 Experimenting with Polymer Capacitors Challenge is an opportunity to “experiment, test, breadboard, or just play around with Polymer Capacitors” and then show what was learned. In this 3rd and final post a Panasonic Polymer Capacitors f...(read more)

Using Polymer Capacitors for Supply De-coupling in the Current Amplifier - Test Results

three-phase — Wed, 05 Jun 2019 21:18:56 GMT

Introduction These are the test results from my experiments with changing out the electrolytic capacitors in the decoupling circuit of my current amplifier with alternative polymer capacitors. The test set up is described in the original bl...(read more)

Blog 2: As much as Polymer Capacitors can go in Instrumentation Amplifier.

fyaocn — Tue, 04 Jun 2019 07:54:43 GMT

Contents Contents 01. Rating and Parameters of Polymer Capacitor in the Kits. 02. Simulation of AD8428 Instrumentation Amplifier by ADI 03. Schemtic Design and PCB Design 04. PCB making and Solding 05. Test with MKR1000 06. Conclusion &n...(read more)

Using Polymer Capacitors for Supply De-coupling in the Current Amplifier

three-phase — Thu, 30 May 2019 21:22:56 GMT

This is my unofficial entry into the Experimenting with Polymer Capacitors challenge - I never applied for the capacitor kit, as my little escapades into electronics are very ad hoc and I felt that a kit of capacitors would go to waste on me, and it ...(read more)

Polymer Capacitors in Vintage Designs - Part #02

COMPACT — Mon, 27 May 2019 09:22:05 GMT

Can we remove this noise using polymer capacitors or by other means? As a random hack without applying any science I inserted some polymer capacitors at random into the PDN to observe any effects.I chose the capacitors with the most convenient p...(read more)

Evaluating Polymer Capacitors - Buck Converter Tests

ralphjy — Sun, 26 May 2019 04:43:19 GMT

I've used a number of different buck converters to experiment with small solar panels. Since this is a relatively short challenge I decided to modify an existing converter circuit rather than trying to design and build a new one. Here...(read more)

Deep Dive into ESR, Testing

fmilburn — Sun, 26 May 2019 00:26:00 GMT

Evaluating Polymer Capacitors - Pogo Pin Fixture

ralphjy — Sat, 25 May 2019 23:28:42 GMT

The surface mount (SMD) capacitors used in this challenge are difficult to connect to instrumentation without soldering them into a test circuit. To facilitate some of my scope and pulse generator measurements I made a simple test fixture that ...(read more)

Blog 1: Brief on Experimenting the performance of Polymer Capacitors in Instrumentation Amplifier for Medical

fyaocn — Wed, 22 May 2019 02:37:44 GMT

Experimenting the performance of Polymer Capacitors in Instrumentation Amplifier for Medical 1. IntroducionMedical application like ECG use instrumentation amplifier to condition small signals in the presence of large common-mode voltages ...(read more)