cop > 1

[guruji]

Oh ok while posting the one before I did not see your diagram.
Ok thanks

[Inquorate]

@mscoffman '' Inquorates design on the
other hand uses what is
called an emitter coupled non-inverting
amplifier. ''

hehe, i had no idea, it just seemed more efficient ......

@groundloop - looking forward to seeing your self oscillating coil design, i will be building it when i can - which may be a while -

thankyou for sharing your efforts

[Groundloop]

@Inquorate,

Attached is my new emitter follower oscillator battery charger.
The circuit is approx. 82% efficient when powering a resitive
load of 22 Ohm.

Here is what I like about this circuit:

+You can disconnect the charge battery while the circuit is powered without any harm
to the circuit. The charge battery is in series with the power coil so the circuit just stops
when the battery is disconnected.

+The circuit is self adjusting when charging. When the battery is empty then the internal
resistance of the battery is high. The charge current will then be low. When the battery
starts to charge then the internal resistance of the battery drops and the charger increase
the charge current. This will shorten the time it takes to fully charge the battery.

+There is little waste of heat in the circuit. Since this is an emitter follower oscillator then
the base currents is not wasted but goes through the power coil.

+The polarity of the power input can be accidental switched without any harm to the circuit.
The diode at the minus terminal will block the positive wire. The oscillator will simply not
run with wrong electric polarity.

+The circuit works well over a great range of input voltages. The operator can adjust the
input voltage to get the correct charge power going to the battery. The frequency of
the oscillator also goes up at higher input voltages. This improve the efficiency even
more when charging several batteries connected in series. (Battery bank).

I can say for 100% sure that this CIRCUIT is not over unity. What I can't test is if
the process of pulse charging lead acid batteries is a over unity process. I have no time to
do a endless battery swapping so I leave it up to others to prove if a pulse charging
of batteries is a over unity process.

Groundloop.

[guruji]

Groundloop nice JT setup I will try this too. Are there cross reference components on this cause those components seem a bit scarce.
Ok thanks

[Groundloop]

@guruji,

It is not a Joule Thief circuit.
The circuit will probably work OK with other components also.

G.