coquelicot‭

I think the point is simply that there are much more demand on the buck-boost topology than on the Cuk/Sepic ones. And there are GOOD reasons for that: Several years ago, I asked a question on th...

posted 4y ago by coquelicot‭

I've accidentally burnt my dimmer with a short. It is a common dimmer with a triac/diac/pot of the simplest configuration (the triac is a BTA16). After replacing the triac, this still does not work...

2 answers  ·  posted 4y ago by coquelicot‭  ·  edited 1y ago by Lorenzo Donati‭

That may seem a pointless question, but life has taught me to be careful and to ask before any "somewhat unusual" steps. Also, despite it could be a Codidact question, I think it is also dependent...

2 answers  ·  posted 4y ago by coquelicot‭  ·  last activity 4y ago by Olin Lathrop‭

That's an excellent idea. But I think there is no need in punishing bad posts here, because there will be very few posts here anyway, I'm sure. You have only to remove those infrequent "bad papers"...

posted 4y ago by coquelicot‭

Hello, I come from EE.SE. I just would like to help you to build this site. And I have some observations: First of all, it is still unclear what is the added value of this site with respect to the ...

1 answer  ·  posted 4y ago by coquelicot‭  ·  last activity 4y ago by Olin Lathrop‭

In some books and other technical papers (also from universities) it is - surprisingly - still claimed that the bipolar transistor (BJT) would be a current-controlled element. And this is true, s...

posted 4y ago by coquelicot‭  ·  edited 4y ago by coquelicot‭

MOV are bidirectional components suitable for both AC and DC circuits, TVS are most often unidirectional, despite bidirectional TVS are also available; conducts more current compared to TVS diod...

posted 4y ago by coquelicot‭

The input and output impedance of these amplifier is 50 Ohm. You don't need to measure them. That's because they are intentionally matched to the characteristic impedance of the coaxial cables tha...

posted 4y ago by coquelicot‭  ·  edited 4y ago by coquelicot‭

I'll try first to give a general introduction to the problem, then I'll switch to your particular questions. Passive linear components, like capacitors, inductors or resistors are not ideal. For t...

posted 3y ago by coquelicot‭  ·  edited 3y ago by coquelicot‭

I have proposed to fix a threshold of 100 pts to have the rights to downvote, which solves partially the problem of massive downvotes by trolls creating new accounts. This suggestion seems to have ...

posted 3y ago by coquelicot‭  ·  edited 3y ago by coquelicot‭

Just to let you know: if one day you have to use the LM337 negative voltage regulator, protect everything with TVS or Zeners. This is the most failing component I've ever seen (and I'm not the only...

posted 4y ago by coquelicot‭  ·  edited 4y ago by coquelicot‭

Usually, voltage followers are built with bipolar transistors (or with opamps if better precision is needed). In this case, the simple rule says that the transistor emitter "follows" the input vol...

5 answers  ·  posted 4y ago by coquelicot‭  ·  last activity 4y ago by TonyStewart‭

Don't put the "protective" series resistor: connect directly your regulated power supply to the diode (with a short wire) and measure the current: the voltage regulator is all what you need to prot...

posted 4y ago by coquelicot‭  ·  edited 4y ago by coquelicot‭

Assume my oscilloscope is grounded, and the DUT is grounded as well (earth ground). I am using a standard 10 Mohm impedance 1:10 passive probe. So, the ground terminal of the probe is in fact con...

2 answers  ·  posted 4y ago by coquelicot‭  ·  edited 1y ago by Lorenzo Donati‭

Somewhat a pity to throw money for an expensive ultra-low capacitance TVS. You have not specified what is the frequency range of your antenna system, but since you say you have to protect it from ...

posted 3y ago by coquelicot‭  ·  edited 3y ago by coquelicot‭