What Is a Software Calculator?

A calculator is an electronic machine invented by modern people that can perform numerical operations.

Classification by expression

1. Physical calculator, this type of calculator is generally a handheld calculator, easy to carry, and more convenient to use, but in general, the function is simpler, and it is not convenient to upgrade the function. There are also few powerful graphical handheld calculations Device, but as the most expensive, in

   The calculator includes two types, the standard type and the scientific type. The standard type is used as follows:

   1. When typing a number, press the corresponding number key. If you press the CE key incorrectly, you can cancel a value, and then re-enter the correct number. ^[2]

   After power on, the display is dim or bright. First measure whether the battery voltage used is normal. If it is normal, you can further check whether the battery spring pressure is sufficient and the contact is good. If there is a problem, you can use elongated springs or use fine sand to polish the contacts of the battery pole pieces. ^[2]

   There is a digital display but it cannot be operated after power on. Check the circuit board with a multimeter to see if there is a short circuit between the terminals of the integrated circuit block. Use a multimeter to check the voltage value of the keyboard input terminals of the integrated block (for L1-3033E, 24-29 pins). The normal value should be about 0.12V, otherwise it may The manifold is broken. If the voltage is normal but cannot be calculated, the keyboard may have poor contact, foreign matter on the circuit board, the circuit board is open, or the keys may be stuck. ^[2]