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jan.lichtenbelt
jan.lichtenbelt vor 11 Stunden
What is the maximum voltage allowed for the current probe?
Potential-free current measurement for oscilloscopes [150170]
ClemensValens
ClemensValens vor 14 Stunden
It is a PNG file.
LED Analogue Fader
tony1tf
tony1tf vor 20 Stunden
Could you explain the theory of this a bit more, please. I though that to de-sulphate a battery you needed high current pulses into it, not discharge pulses. Indeed, if the battery is high impedance, then you cannot get high current discharge pulses. So perhaps this circuit is only designed to keep good batteries "alive". I have previously seen circuits which use an inductor to get a high voltage pulse to breadown sulphation. Tony
Activator for lead accumulators [160064]
Roel Arits
Roel Arits vor 21 Stunden
That is exactly what it is, Arnoldus. The circut belongs to the family of gyrators, like the Antoniou and the Riordan gyrator. You find many names for it : simulated inductor, synthetic inductor, active inductor. But gyrator is the collective name. I chose for a simple version of the gyrator, because these are easier to understand and also easier to manipulate. I needed a bad inductor with some loss, so the current changes in a semi-exponential way instead of linearly. By tweaking the components of the simulated inductor, i was able to make a "lossy" one. Simply stated : the active inductor i used is a capacitor that is inverted by the transistor, so it behaves like an inductor.  
Linear analogue LED fader using synthetic inductor
Arnoldus
Arnoldus vor 1 Tag
There are a lot of ways leading to Rome... Hi Roel, your 'synthetic inductor' looks very much like a Gyrator! Ever heard off?
Linear analogue LED fader using synthetic inductor