by peter_retief on 12/8/24, 7:30 AM with 13 comments
by IndrekR on 12/12/24, 10:29 AM
Also quite similar is actively driving the shield used in many high impedance sensor circuits (most notably capacitive touch sensing) to reduce the parasitic capacitance you would get when ground is used for the E-field shield:
by jonjojojon on 12/12/24, 2:35 PM
by zh3 on 12/12/24, 12:22 PM
https://www.digikey.co.uk/en/articles/how-to-use-photodiodes...
by formerly_proven on 12/12/24, 12:06 PM
The tricky bit is going to find a suitable replacement for the BF862.
by rapjr9 on 12/12/24, 8:02 PM
https://en.wikipedia.org/wiki/Capacitance_multiplier
Which leads me to think about planned obsolescence in electronic circuits. In many electronic circuits the electrolytic capacitors are the first to degrade, limiting electronics lifetime to 10+ years. What if those capacitors were replaced with amplified capacitors where the capacitor was not electrolytic, say a film capacitor. Maybe the circuit would work the same and last 20-30 years, eliminating a lot of electronic waste and reducing environmental carbon due to manufacturing? Part of the solution to climate change has to be manufacturing products that last longer. Electrolytic capacitors, built in batteries, fans, and parts made of rubber instead of silicone are some of the prime components that cause failures. I have a suspicion car companies have tuned steel formulations and paint to cause rust after a specific number of years as well.
by frabert on 12/12/24, 12:04 PM