electric calculator Att+3

◆Rated power and resistance(Resistor)(of components like LEDs)

◆Ohm's law

◆Pi+T Attenuator circuit and low-pass(LPF) high-pass(HPF) filter
frequency calculators

◆Speaker Earphone Processor Custom Modification

◆Delay chorus used in distance and time(ms)

◆simply tool for diy and beginner