Solid state Bedini charger from John Peters

[guruji]

Hi Niofox I tried other capacitors but don't know if it's more efficient than bedini setup.
I tried 22nf 63v;33nf 250v and 48nf 250v and now I'm using a 47nf 630v. Last one looks that it's giving high voltage although never saw the neon violet.
Try to experiment cause maybe it differs with certain coil lenghts.
Crowclaw so you managed to charge both batteries with that 555 timer relay setup?
Thanks

[guruji]

Niofox today I measured the output with a DMM it giving 300v!!!.
You said:The one I tried only gives me ~60v spikes whereas I was getting ~200v with my earlier setup.   Of course, the 60v spikes only cost me 20ma
What capacitor you used to give you that low consumption?
I would do both my setup and yours and then do a switch.
Thanks

[crowclaw]

@ All,
Hear is one of my experimental circuits using the back EMF to charge a 12volt 2.7Ah gel cell. I have not included the 555 timer circuit (unless requested) as there are plenty of examples. The frequency is variable at around 1KHz > 3KHz with a variable mark/space ratio. The timer output signal is fed to the input via 1K resistor to the BSP452. This device is known as a 'High side switch' and has MOSFET characteristics. The device is manufactured by Infineon and is a SMD device (surface mount device) which directly switches the source current through the Inductor L1. The back EMF pulses are coupled to the charge battery via D1... 1N5408 or similar, I used a UF5408 (ultra fast switching diode)  inductor L1 can be any type capable of supplying a few 100Ma's or more. You can also parallel up BSP452's to provide higher charge currents. Information on the BSP452 in PDF can be down loaded from the net.

[niofox]

Niofox today I measured the output with a DMM it giving 300v!!!.
You said:The one I tried only gives me ~60v spikes whereas I was getting ~200v with my earlier setup.   Of course, the 60v spikes only cost me 20ma
What capacitor you used to give you that low consumption?
I would do both my setup and yours and then do a switch.
Thanks

104Z is printed on the cap.  Ceramic I think this is?
Anyways, here's the pic of it and some coil pics.  I just have it held together with that blue painter's tape
Using 110k ohms (measured) and the MJL21194 transistor
I measured the spikes using a cap as output, I don't have a scope yet

[crowclaw]

104Z is printed on the cap.  Ceramic I think this is?

Hi Noefox,
Yes your cap is a ceramic plate type and 100n or 0.1uf
regards M