3.7 VOLT BATTERY POWERS 56 WATTS

[magnetman12003]

Hi dieter, i looked up his model scr and it's around $10 on internet.
I found one with a little less specifications, NTE5554 for $6.
Peak Reverse Blocking Voltage (Note 1), V_RRM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .400V
Forward Current (T_C= +80°C), I_T(RMS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25A
(All Conduction Angles), I_T(AV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16A
Peak Non-Repetitive Surge Current (8.3ms), I_TSM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300A
(1/2 Cycle, Sine Wave, 1.5ms). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .350A
Forward Peak Gate Power, P_GM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20W
Forward Average Gate Power, P_G(AV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.5W
Forward Peak Gate Current, I_GM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2A
Operating Junction Temperature Range, T_J. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40° to +125°C
Storage Temperature Range, T_stg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40° to +150°C
Thermal Resistance, Junction-to-Case, R_thJC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.5°C/W

I wonder if this SCR will work good, i will be using a different blocking oscillator for the main circuit though, probably with a ferrite flyback core from a TV.
Because as i see it, it is the capacitor dumping part of circuit, that is giving him his output boost.
In fact, when using 3.7-5 volt input, only the capacitor dump is powering the bulbs, which is why i'm assuming, that SCR thyristor must be firing at a pretty good frequency to make the bulbs look like they are lighting continuously.

Also found this SCR, NTE5466, for $4.
Peak Repetitive Reverse Voltage; Peak Repetitive Off-State Voltage (Note 1), V_RRM, V_DRM. . . . . . . . .  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600V
Non-Repetitive Peak Reverse Voltage; Non-Repetitive Off-State Voltage, V_RSM, V_DSM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700V
RMS Forward Current (All Conducting Angles, T_C = +75°C), I_T(RMS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10A
Peak Forward Surge Current (1 Cycle, Sine Wave, 60Hz, T_C = +80°C), I_TSM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100A
Circuit Fusing Considerations (T_J = -65° to +100°C, t = 1 to 8.3ms), I²t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40A²s
Forward Peak gate Power (t ≤ 10µs), P_GM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16W
Forward Average Gate Power, P_G(AV). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .500mW
Operating Junction Temperature Range, T_J. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40° to +100°C
Storage Temperature Range, T_stg. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-40° to +150°C
Thermal Resistance, Junction-to-Case, R_thJC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2°C/W

This is a HYBRID circuit I made using a lot of thoughts from many different people.  Jonny Davro thought of using the automobile coil to limit hi current to the 35C transistor.   I thought to use this Bedini style circuit with many different parts and a different plastic coated coil wire - my choices.  The low current transistor 35C powers the hi current coil part of the circuit and the hi frequency, voltage, and current BACK EMF (radiant energy??) is dumped into the bridge rectifier and capacitor.

This is where this becomes interesting:    Since I figured the radiant energy from the coil needs to be used some place I found a article (now deleted) from the internet about how to gather and use radiant energy using an antenna system.  It was posted by Andrew Munsey.   So I directed the cap to dump is collected radiant energy into the SCR and see what happens.  I burned up a brand new watt meter doing this only to find the circuit worked with the shorted watt meter in place?  I substituted A section of wire in its place and the circuit has worked flawlessly to this date.
I even had it working using a very small 12 volt 27A cell.     It also will work with 24 volts DC but take care unless you burn up your 12 volt bulbs,

[magnetman12003]

Hi magnetman, thanks for sharing the pics.
Just to verify, the led bulbs are 12 volt DC input correct.
So no problems with the capacitor dump voltage being so high, the 12 volt led bulbs are not being damaged by this.
Maybe because the capacitor capacitance value being so low, is why it's not frying the leds inside the bulb.
peace love light

Correct  - 12 volt input.

[Zephir]

3100 mAh 18650 battery can give 20A at 3.7 volts easily, which corresponds 20 x 3.7 = 74 watts of power

[gyulasun]

Hi magnetman,

Please check the wiring connection of the thyristor pins in your schematic versus your setup
(you uploaded the schematic in previous page, Reply #10) because I think there is a drawing error.

The K pin (Cathode) ought to go to the negative rail (I mean the emitter pin of the TIP35C transistor
as negative rail) and the center pin A (Anode) of the thyristor ought to go the negative end of capacitor C1
(which is on the left hand side of C1 symbol). I think this would be the correct wiring.
The Glimm lamp is okay between A and G  (G=Gate).
(In your schematic, the K pin goes to the negative end of the capacitor C1 and the A pin goes directly
to the negative rail.)

I edited your drawing to show how I mean.  Here is a data sheet on the thyristor:
http://www.st.com/content/ccc/resource/technical/document/datasheet/e4/31/81/91/1a/e2/49/17/DM00085949.pdf/files/DM00085949.pdf/jcr:content/translations/en.DM00085949.pdf   

If you disagree with my schematic modification, please tell.

Gyula

EDIT   Thanks to member citfta's explanation I deleted my drawing because it was not a correct modification.

[magnetman12003]

Hi magnetman,

Please check the wiring connection of the thyristor pins in your schematic versus your setup
(you uploaded the schematic in previous page, Reply #10) because I think there is a drawing error.

The K pin (Cathode) ought to go to the negative rail (I mean the emitter pin of the TIP35C transistor
as negative rail) and the center pin A (Anode) of the thyristor ought to go the negative end of capacitor C1
(which is on the left hand side of C1 symbol). I think this would be the correct wiring.
The Glimm lamp is okay between A and G  (G=Gate).
(In your schematic, the K pin goes to the negative end of the capacitor C1 and the A pin goes directly
to the negative rail.)

I edited your drawing to show how I mean.  Here is a data sheet on the thyristor:
http://www.st.com/content/ccc/resource/technical/document/datasheet/e4/31/81/91/1a/e2/49/17/DM00085949.pdf/files/DM00085949.pdf/jcr:content/translations/en.DM00085949.pdf   

If you disagree with my schematic modification, please tell.

Gyula

The black dots on the schematic are where connections are made.  The bent line you pointed out is a jumper.
no connection at midpoint is made.