Hehe,
good luck with your battery. Due to my understanding of the VR I got about 3kOhm for R2 with my pencile strokes.
0.8 * ( 1 + 1/3 ) = 1.066V
Doing lesser strokes should result in a higher resistance what gives us a lower voltage. Measuring the resistor in circuit doesn't result in the correct value due to other components (L/C/AOZ) also being connected during measurement. If I measure R1 I get about 0.82k and 0.87k for my pencile strokes. Tested with my reference pencil on a paper I get about 10kOhm for one stroke of 2mm decreasing by about 1kOhm per additional stroke. Graphite has about 8 Ohm per mm²/m. Compared to copper this is rather bad.
The resistor measuring was done while the device was off/not connected to power. And my antminer was slow before I tried the pencil magic
It's not totally wrecked and is after the magic still as slow as before. But yes, your warning is correct. Shortening R1 would increase the Voltage and current flow throuh voltage divisor R1/R2.
Greetings,
miniasic.
good luck with your battery. Due to my understanding of the VR I got about 3kOhm for R2 with my pencile strokes.
0.8 * ( 1 + 1/3 ) = 1.066V
Doing lesser strokes should result in a higher resistance what gives us a lower voltage. Measuring the resistor in circuit doesn't result in the correct value due to other components (L/C/AOZ) also being connected during measurement. If I measure R1 I get about 0.82k and 0.87k for my pencile strokes. Tested with my reference pencil on a paper I get about 10kOhm for one stroke of 2mm decreasing by about 1kOhm per additional stroke. Graphite has about 8 Ohm per mm²/m. Compared to copper this is rather bad.
The resistor measuring was done while the device was off/not connected to power. And my antminer was slow before I tried the pencil magic
It's not totally wrecked and is after the magic still as slow as before. But yes, your warning is correct. Shortening R1 would increase the Voltage and current flow throuh voltage divisor R1/R2.Greetings,
miniasic.