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I found a circuit after some googling & poking at some pins looks like this is the right schematic.
The RS232 transceiver power is disconnected via Q1 after the burst of 8 cycles. That probably explains the high voltages during damping period because there is no path for discharge. I think...
Hi Guys,
I need help to understand the inner working of US distance measurement sensor.
I was very amazed with the quality of the output from the "HC-SR04" sensor. So, I started digging into the circuit. There isn't any schematic of the board and I started by looking at the waveform on the...
I'm trying to find if there is always a solution (M1, M2 exists) or if there is any defined steps instead of trial-n-error.
I wrote down the equation for convolving 2x2 matrices, we get 9 equations (output is 3x3 known matrix) in 8 unknowns (2x2 M1, 2x2 M2). I think its a over-determined system.
Why is it impossible to determine the matrices?
For 1x1, convolution is just a simple multiplication:
a * b = c or
a x b = c
b = c/a.
Given "c", we can choose any non-zero for value for "a", and compute "b".
Hello all,
Consider a 9x9 matrix (M). We can express it as a convolution of two 5x5 matrices (M1, M2) i.e
M = conv2(M1, M2);
Given a matrix M, how can we find M1 & M2?
If one of them can be determined then the other can be computed by known deconvolution algorithms. But, how do we begin...
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