555 voltage step up using transformer

188

03:40:24

Instead of caps and diodes I use a transformer.

published 7 years ago

hurz

7 years ago

still without 15Ω as 555 workaround give rubbish at pin 3! subsapling 50ms/s is good for chaos use at least 1ms/s. 1:1000 transformer have on secondary side an inductivity of 600000H !! All in all not a big step ahead.

Voltransistor

7 years ago

That's crazy. Wouldn't it be 2400H? 1 turn=600mH(.6H). 1turn- 1k turns(1,000 turns). 1,000 turns×.6H=600H. 4 transformers in series. 600H×4 transformers = 2400H. Yeah true! Lol.

hurz

7 years ago

its not linear, its a quadratic relation between primary to secondary impedance. The voltage is linear 1:1000 related V ti 1000V but not the impedance! The impedance is 1:1000² which is 1:1000000 with 0.6H in your case its 1000000*0.6=600kH

hurz

7 years ago

BTW, this parallel or series of transformes not taken into account, which makes it only more complicated without any need.

wyoelk

7 years ago

Hurz, curious, noticed on several 555 type circuits you recommend a 15Ω resistor on pin 3. What does that accomplish?

hurz

7 years ago

its a natural current limiter and avoids ridicouls voltages at pin3 check it out yourself with capacitive loads with and without 15 or better 15.1 Ohm you will see the big difference a which of the circuits crashes in simulation and which one runs forever 😀

Voltransistor

7 years ago

Thankyou hurz! 😀 I learned something from u today. That makes totally sense. ☺

Voltransistor

7 years ago

The current limiter I'm assuming is to protect the 555 output from damage too. Lol

hurz

7 years ago

thats nice to hear, always a big pleasure if young engineers say "thanks i have learnd something", thats the biggest persent you can make me as an old engineer! Thank you!

hurz

7 years ago

maybe @lenzrulz can now understand when i say thank you on an thank you! Maybe he will never have that feeling cause he will never be a teacher as he is not even learning as a noob. what a pitty

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