Relaxation Oscillator

251

04:28:08

Help making it run as sim. 2 things are making it hard: Tungsten filament is not behavioral, the pnp npn transistors are not exclusively negative resistance models. Build it, try it, tell me.

published 10 years ago

hurz

10 years ago

Simspeed to 1s/s and power of bulb to 3V to get a much lower resistance. Shake to start. But frequency is very low, so be patient. Hope this helps.

hurz

10 years ago

with 20uF its a little faster flashing http://everycircuit.com/circuit/5935671823302656

Lumixeu

10 years ago

Thx hurz, in the 1/1s sim I can actually see why it turns on. In RWD 'real' world it's complicated, but thatfor it's easy, because the Bulb is magically smoothing the Simulation-ripple or in RWD, it's it's doing many things. I would like to simulate the bulb, which would end in one -not beautyfully simple- solution.

qassis

10 years ago

Lumixeu, is this correct or simulator artifact? Thank you.

Lumixeu

10 years ago

Quassis, It works in RWD. Simulation works sometimes. So there are artifacts in the time Domain, which i think is most likely.

hurz

10 years ago

Simulation does work always or never! Works "Sometimes" - might be the case in real world.

Lumixeu

10 years ago

@ hurtz Simulation works at some time resolution some not, while in reality it has to work - then it does or can't then it doesn't. A Simulation alike LT-Spice or Orcad PSpice does work and work very very accurate in comparison to each other or reality.

hurz

10 years ago

Dont forget you are sitting in front of a cheap low power device and you make use of a low cost application. Which is just COOL what it can do for you if you understand all given limitations! And maybe even know some workarounds.

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