Second Stage Joule Thief Circuits

[stprue]

@Gadget

Have you thought about using a DC voltage controller that is typically used for solar panels for your charge controller?

[Groundloop]

@nievesoliveras,

Thank you for the drawing.

Here are the design criteria:

A battery capacitor is being charged by a JT via a single germanium diode.
The battery capacitor is sharing the "ground" (e.g. minus pole) with the AA battery.

When the battery capacitor is charged to 2,6 Volt then:

1. JT is disconnected
2. Some feedback from the battery capacitor to the AA battery to keep it topped up.
3. Battery capacitor is discharged into load.
4. The discharge circuit must withstand a LOT of ampere.
5. When the battery capacitor reaches 0,5 Volt then stop discharging
6. Connect JT
7. Repeat from above.

Another design criteria must be that the circuit does not load the battery capacitor or the battery
during the charging cycle.

If anyone can make such a circuit then I'm all ear. I was very close with my circuit solution but
it did not work on 2,6 Volt. It was also unstable due to the relays. I will look more into this the next
weekend if I find time.

Alex.

[gadgetmall]

@Gadget

Have you thought about using a DC voltage controller that is typically used for solar panels for your charge controller?

I did and I am sure Alex did as well . here is the stumble point . The circuit need to be operated with voltages LESS THAN 1.4 volts . I have thought of boost converters that are available that boost 1 volt to 5.5 volts but they are surface mount devices . My idea would be to only draw from the run battery alone as it can be replenished at a slow rate with a regulator from the Bcap . I would rather not pull from the Bcap for powering the circuit . I also discovered that using a Peliter module rated at 12 volts can run nicely on th ebcap and produce heat and COLD without pulling down the bcap too fast unlike nichrome wire . so i will abandon the nichrome wire and use  cheap Peliter modules . Much better continuous heat or cold when the bcap circuit fires. . All suggestions are very welcome as this is your machine also . If we win i give all the contributors a split . if not then at least everybody will know how to make them a compact self runner complements of Alex and and other EE'S .

Calling all EE 's for help designing one volt switching circuits .

Gadget

[nievesoliveras]

@Jesus . We are trying to adapt this circuit to a JT  for the prize . Can this circuit be adapted to a normal JT ? . The purpose Of Alex's Circuits are to monitor the run battery and top it off what the Charge Bcap is above the battery in both volts and amps. . There are other ways to charge these bcaps . If you could and have built the circuit you describe could you measure the volts and current on the out put . the cap is basically a dead short in any circuit so an amp meter will represent the bcap as it is also a short . .

Albert

@nievesoliveras,

Thank you for the drawing.

Here are the design criteria:

A battery capacitor is being charged by a JT via a single germanium diode.
The battery capacitor is sharing the "ground" (e.g. minus pole) with the AA battery.

When the battery capacitor is charged to 2,6 Volt then:

1. JT is disconnected
2. Some feedback from the battery capacitor to the AA battery to keep it topped up.
3. Battery capacitor is discharged into load.
4. The discharge circuit must withstand a LOT of ampere.
5. When the battery capacitor reaches 0,5 Volt then stop discharging
6. Connect JT
7. Repeat from above.

Another design criteria must be that the circuit does not load the battery capacitor or the battery
during the charging cycle.

If anyone can make such a circuit then I'm all ear. I was very close with my circuit solution but
it did not work on 2,6 Volt. It was also unstable due to the relays. I will look more into this the next
weekend if I find time.

Alex.

I have not built the circuit. But I got it from a Nebo flashlight I opened to see how it charged the running battery when you move the hand crank without disturbing the light. It uses the battery and charges it at the same time. The battery is a 3v flat battery like the ones inside a computer motherboard.

I made a schematic of the working and pulled out just the part I posted which can be run with a joule thief to charge a cap and after the 1.5v is reached on the capacitor and the zener senses it it will fire the transistor wich will short the cap and discharge its contents onto the source battery.

This circuit can work apart from the circuit of the 650F cap.

Jesus

[nievesoliveras]

The circuit will run from the secondary of a JT

Jesus