How to improve my Surf PI 1.2 for a mission like this: Underwater search for iron/steel solely

[kt315]

seen this pic you may present the depth. this probe is main instrument for lift up. it can be with hook and pin on its end changing.

[Ferric Toes]

It's a fake.
Just one of KT315's little jokes.

That's OK then. I got a bit concerned when Loola said "Thank you for the book tip! I will look it up."

Eric.

[Loola]

Many years ago my father drove a 6000 Kilos heavy tractor trough the ice. When the ice got thicker, he and couple off men went back out on the ice with a big quadpod with a manual operated winch. They manage to lift the tractor back up on the ice again. So, the ice does not always have to be an obstacle, it could even be beneficial to when it comes to recovering goods from the bottom.

/Loola

[ZOUjiarui]

U1 (555) is the TX oscillator. You could change R1 (100k) to 180k, and R2 (3k3) to 22k. This will give you a TX pulse width of 332us and a transmit rate of 329pps. Alternatively, replace R1 and R2 with trimmers, and adjust the values to get exactly what you want. However, the Surf-PI also uses the TX oscillator to generate the audio tone, which is 623Hz, so the audio tone will be much lower if you change these components.

I don't know the maximum sample delay setting on the Surf-PI, but this is adjusted by P2 (100k). You may have to change the values of P2 and/or C9 to achieve 100us.

Otherwise, have a look at Minipulse Plus Rev-E, which already has on-board trimmers to allow independent adjustment of the PX pulse width and transmit rate. There is a separate VCO audio oscillator, which means that the audio tone will be unaffected.

Hello, I directly added 68k and 20k resistors, and the irf9640 and damping resistors heated up seriously. Is there any solution?
Thank you so much

[ZOUjiarui]

The two resistors are connected in series. I don't have 180k and 22k