jippie

Eindhoven, Netherlands

wirespeed.xs4all.nl/mediawiki

Age: 45

Do you love your Pets as much as I do? Check the Q&A proposal!

I'm into:

  • Linux;
  • Networking;
  • IT Security;
  • Perl;
  • System integration;
  • Arduino;
  • ATtiny & ATmega Microcontrollers;
  • Analog electronics;
May
22
awarded Popular Question
May
20
comment Micro-controller as a load
Resistive is probably closest to reality, but it changes quickly with clock, with different instructions being executed, with peripherals being enabled, with output pins loaded ... etc. Asking this question gives me a feeling you are trying to cut corners where you really shouldn't. The power supply is the most important part of your project, without a good PSU your entire project can fail to work. Give us more details on what you are trying to do and how you consider to implement that. With that information people can give you hints/tips how to improve if needed.
May
20
revised Procedure for finding the right MOSFET, diode and resistor to make a solenoid valve open/close?
Fixed annoying typo in Schottky diode.
May
20
comment Procedure for finding the right MOSFET, diode and resistor to make a solenoid valve open/close?
Why not split up your question in two logical parts: MOSFET (1, 2, 3, 8) and flyback diode (4, 5, 6, 7)? I didn't check, but I bet there are similar questions on EE.SE already (see the top right column "RELATED").
May
20
revised Procedure for finding the right MOSFET, diode and resistor to make a solenoid valve open/close?
corrected URL
May
18
comment Why PNP transistor might be opened even though (almost) nothing is connected to the base?
Sounds to me you have a bad cap or aren't waiting long enough for it to charge. Looks like the circuit is dimensioned for about 2 (5×R×C=5×100e3×220e-6=110 sec.) minutes before it stops.
May
18
revised Why PNP transistor might be opened even though (almost) nothing is connected to the base?
added 81 characters in body
May
18
comment Why PNP transistor might be opened even though (almost) nothing is connected to the base?
Are you sure C2 is not leaking? What happens when you disconnect that from the original circuit?
May
17
revised How does a negative feedback amplifier reach steady state?
added 40 characters in body
May
17
revised How does a negative feedback amplifier reach steady state?
added 40 characters in body
May
17
comment Buck converter based switching power supply?
Maybe this can be of some help: electronics.stackexchange.com/questions/28251/… Your circuit layout can use some ironing.
May
17
comment Buck converter based switching power supply?
Agreed with @RussellMcMahon. For others to understand a circuit diagram it helps if you discuss its intended operation. Also, the load is missing. Draw it as a resistor.
May
16
asked Passing a parameter to a dstat plugin
May
15
answered Three-phase Y and Delta Configurations Polarities
May
11
awarded Nice Question
May
11
comment Adding Bass and Treble control to existing schematic
I can't recall the name for this more or less standard circuit, but you find it used everwhere: next.gr/audio/tone-balance-filters/… As described on the page itself it is line level, so it is to be connected at the left of your circuit diagram, the low power / pre-amp stage.
May
10
awarded Famous Question
May
10
comment Transistor help
How did you measure the receiver output? Although possible it seems a bit low.
May
10
comment Multimeter battery test
The typical 9V block is not designed for such a high load. Your typical datasheet will spec the battery for a substantially lower load.
May
10
comment Suggestion for forums that help Power system researchers
I skipped reading the question because the formula's are so hard to read, both in font size and there could have been a fair bit more accompanying comments with it.
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