The resistive touch screen only supports single touch

 The resistive touch screen only supports single touch.
Only realize it would be more difficult. Phone sensor light sensor in the phone using the light sensor is generally a phototransistor, also known as a phototransistor, the phototransistor current amplification phototransistor 2 PN junction, the same basic principles and the photodiode, but optical signals into electrical signals at the same time, but also amplified the signal current, so it has a high sensitivity phototransistor equivalent circuit diagram mobile phone light sensor circuit Detailed NOKIA N73 light sensor circuit as shown, the phototransistor V6501 will sensed light into electrical signals sent to the detection circuit in the power management / audio IC. The three pieces of mini antennae of can be kept on the host of the mini portable cell phone jammer .
Then output control signals to control the LCD backlight, so that it can with the environment, the intensity of light transform the brightness to save power to meet the needs of visual purpose. Phototransistor on the phone NOKIA N73 light sensor circuit according to the ambient light brightness to determine the conditions of use of the user, smart regulation, on the phone to achieve the purpose of energy saving and user-friendly. The light sensor role is to automatically reduce the brightness of the backlight in dark environments, so as not to backlight is too bright glare. The sun automatically increase the brightness of the screen, make the show more clearly. Phone to move to the ear phone automatically turns off the screen and backlight, can extend the life of the phone at the same time Close the touch screen can be achieved to prevent the call process of inadvertently screen to hang up the phone misuse.  Camera control signals.  Hall sensor in a clamshell or slider phone is also relatively easy to find its general location of the magnet, corresponding to the motherboard of a positive or negative, to find the magnet will be able to find the Hall sensor. It is according to the specific letters marked on the antenna and port of the mini portable cell phone jammer .
The candy bar phone in this circuit. When the magnet near the Hall sensor output low 0V, the output when the magnets leave high 1.8V. Supply voltage NOKIA N73 slider phone, the Hall sensor circuit test signal in the phone class: 11 class name: Meng Jiajia Student ID: 2011103209 Professional: Mechanical Manufacturing and Automation phone touch screen principle and maintenance, replacement and substitution (novice must-read) the Post By :2009-8-4 2:24:00 [the] maintenance phone, replace the touch screen more and more, because now more popular candy bar phone , while the touch screen are very easy to damage the components. There are DCS, CDMA and GSM ports on the top of the host of the mini portable cell phone jammer .