3.7 VOLT BATTERY POWERS 56 WATTS

[SkyWatcher123]

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

[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

[magnetman12003]

Here is what the setup looks like.

[magnetman12003]

the coil

[SkyWatcher123]

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