Automatic shutdown.
The Deli calculator does not have an OFF button. The solutions to turn off the computer are: 1. The Deli calculator may turn off automatically. 2. The reason is that it uses dual solar energy + AA battery, which consumes less power. 3. There is also a solar cell to supplement power when not in use. 4. The internal shutdown schedule will take effect, and after the time has elapsed, the power will be cut off to achieve the automatic shutdown goal.
How to turn off newly purchased Deli calculator? There is no stop button.
The Deli calculator can stop automatically.
The reason is that it uses dual solar energy + AA batteries, which consume less power, and has solar cells to supplement the power supply. When there is no operation, the internal shutdown program takes effect and powers it upntation is enabled. is cut off when the time is up. Achieve automatic shutdown goal.
Detailed information:
There is also the Antikythera apparatus of the ancient Greeks, the Chinese abacus, etc. One of the first calculating tools used in ancient China was planning, also known as calculus. This type of amulet is mainly made from bamboo, but wood and animal bones are also used as materials. There are approximately 270 pieces per pack, which can be carried in a cloth bag.
The abacus, which is still used today, is another invention in the field of calculation tools chold inois. The Ming Dynasty abacus is almost the same as the modern abacus.
In 1642, the great French scientist Pascaline, who was only 19 years old, invented the first mechanical calculator. His calculator had interlocking gears. The gear in one position will rotate the other gear. A position. People can dial the numbers like dialing a telephone number, and the calculation results will appear in another window, but they can only perform addition and subtraction calculations.
In 1694, Leibniz improved it in Germany so that it could perform multiplication and division calculations. After that, electronic calculators did not appear until the late 1950s.
In the 19th century, Babbage took the concept of computing tools even further and attempted to create the first programmable calculator , but the machine he built was too heavy to use.
Baidu Encyclopedia-Calculator
The Deli calculator turns off automatically.
This is a solar + AA dual battery, which consumes relatively little power and has solar cells to supplement the power. When there is no operation, the internal shutdown procedure will come into effect. Once the time is up, the power will be cut off to achieve automatic shutdown goal.
Detailed information:
Calculator troubleshooting:
1. After turning on the computer, the screen becomes darker or brighter. Check if the battery pressure is normal. If it is normal, you can check whether the battery spring pressure is sufficient and the contact is good. If there is a problem, use an extended spring or fine sand to polish the battery terminal contacts.
2. Numbers will be displayed after power on, but they cannot bere calculated. Check the circuit board with a multimeter to see if there is a short between the terminals of the integrated circuit block. Use a multimeter to check the weight voltage value of the keyboard input terminal of the integrated module. The normal value should be about 0.12V. If the voltage is normal, but the calculation cannot be performed, the keyboard may have poor contact, there may be foreign objects on the circuit board, the circuit board may be open or the button may be stuck.