Flip Flop Inverter Using Low Voltage Input

[phantomrenegade]

I replicated Incroyable-Vik95170 circuit and replicated it, I use electrolytic capacitors and run the circuit using a bench top power supply then my 5 watts led bulb is flickering crazy, any help guys?

[SkyWatcher]

Hi phantom, not sure if electrolytic capacitors will work, never tried, try non polarized capacitors.
Assuming your using the 2 mosfet, 2 bipolar transistor circuit.
If changing capacitor type doesn't help, then you can try changing the 4.7kohm resistors to a lower value and see how the circuit behaves.
Other than that, sometimes If the center tap primary or bifilar primary has too high a resistance, it may cause low frequency also.
Hope that helps.
peace love light
tyson

[phantomrenegade]

Hi skywatcher, the video of lidmotor in his french inverter replication I saw that he uses electrolytic, but as you said lowering the resistance of the 4.7K ohms resistor may do the trick, I keep you posted, thanks

[SkyWatcher]

Hi phantom, Don't remember trying polarized capacitors, so can't say if they work or not, try and see.
Also not sure how low the capacitor value can be and still work.
Though do know for sure that lowering the 4.7kohm resistors will raise the frequency, because that was tested.
peace love light
tyson

[phantomrenegade]

Hi sky, sorry for this noob question, but I was thinking why not use 555 timer chip as an astable multivibrator, thinking that you can adjust the frequency and mark space ratio easily

[SkyWatcher]

Hi phantom, no such thing as a noob question, only thing slightly different between us maybe, is maybe a few experiments, hehe.
If you mean to use the 555 on its own, then yes that works fine, though if you intend to use it to create a more true AC oscillation, then it will probably be a more complicated circuit.
peace love light
tyson

[Zardox]

phantomrenegade
When I was playing with that circuit I had a couple of bulbs that flickered like that. What I found was that those particular bulbs had a voltage threshold that when the bulb came on the currant inrush quickly dropped the voltage down to a level that shut the bulb back off. You might try using a different bulb or a higher output supply so long as it isn't going to overdrive your circuit. By the way I now only use those particular bulbs in mains run lights.
hope it helps.

[phantomrenegade]

Skywatcher
Thanks for the tip, I will try to make an inverter with 555 and see what is the result, and maybe compare it's efficiency to the flipflop version
Zardox
Thanks, I will try to change my bulbs and try my luck with that, also as I have said maybe using a 555 timer chip may not be a bad idea since I can control it's frequency thus control the flickering.
Thanks guys I will keep you posted