Kapanadze Cousin - DALLY FREE ENERGY

[verpies]

probably need more of a CSR to see current around diode...

Of course, a CSR is needed to observe the current flowing through a diode

won't there always be a + on the cathode side? 

No, the essence of the DSRD Driver is to reverse the current flowing through the diode.

[d3x0r]

Of course, a CSR is needed to observe the current flowing through a diode
No, the essence of the DSRD Driver is to reverse the current flowing through the diode.

I blew up my CSRs   I found some 100W 0.1R resistors... but I fear I may even blow these

any idea for something more reliable?

100W is only like 9A at 12V

[verpies]

I found some  100W 0.1R resistors...  but I fear, I may even blow these
100W is only like 9A at 12V

No, when 9A flows through a 0.1Ω resistor then 8.1W of heat is dissipated in it. (P=I²R)
...or only 81mW, when the current waveform flowing through this resistor has 1% duty cycle.

Alternatively, when 12V is applied across a 0.1Ω resistor then 1440W of heat is dissipated in it. (P=V²/R)
...or only 14.4W, when the voltage waveform appearing across this resistor has 1% duty cycle.
( a math trivia for you: What is the current flowing through the resistor above? )

P.S.
100W resistors are likely to be wirewound and hence inductive.
Inductive resistors are unacceptable as Current Sensing Resistors (CSRs)

[Hoppy]

If this is the truest Dally's schematic, then I see no way that this TTL NAND Gate can drive the Power BJT (KT926) directly into saturation.
If you see no intermediate transistors between the TTL chip and the Power BJT on the photos, then even more so.

On the attached photo, it can be seen that the KT926 transistor appears to be driven directly from pin 8/11 of the 74HCT00. From this I conclude that Dally's circuit was not in DSR operational mode in the video. Also note that the toroid TR1 is not on a heat sink.

Regards
Hoppy

[verpies]

On the attached photo, it can be seen that the KT926 transistor appears to be driven directly from pin 8/11 of the 74HCT00.

It seems this way, but photos can be deceiving.

What are those elements behind the PCB circled in yellow?
Are those diodes that are soldered to the back of the PCB?
If he soldered diodes back there, then maybe he soldered some small intermediate transistors there, too ?

Where is the archive of Dally's photos (and videos), anyway?