random things I made and things I learnt making them
In a word, impedance. The source impedance from your instrument/amplifier signal, coupled with the capacitance of the cable, creates a low pass filter. The makeup of a standard shielded, unbalanced cable matches that of a capacitor Any signal at a frequency above the cutoff will be attenuated by 1/3 relative to the input signal voltage…
Ever needed a negative voltage rail to quickly test something on the bread board? Look no further. - Abstract: This design uses the "classic" MC34063 switching regulator IC to invert the input voltage rail to a negative voltage, simultaneously stepping up/down the output depending on the position of the rotary dip switch. The resistors in…
Inductance is the relationship between the current and the magnetic field generated in a coil. Each is proportional to the delta of the other. L = l + 0.45 d d 2 n 2 d is diameter of coil in meters, n is number of coil turns, l is length of coil in meters…