circuit harness wiring

The indication light on the host of cell phone jammer is red.
Operators network solutions business. Mobile infrastructure network devices, systems and solutions; microwave communication systems and solutions; optical networks solutions; IPTV solution; broadband solutions; mobile communications applications and value-added service solutions for design, development, systems integration and sales; communication software development, design and system integration, and the system equipment, the end product engineering, maintenance and consulting business. History of the development of the mobile phone industry. China mobile phone the course of development can be divided into the era of analog phones, the GSM era era and the era of 3G, 2.5G, 3G represents the development trend of Chinas mobile phone. If the customer wants to disguise the use of cell phone jammer .
The era of analog phones, probably from China Mobile Communications Corporation began operations in 1987 900MHz analog mobile phone service date to December 31, 2001, China Mobile Communications Corporation is the complete cessation of analog mobile phone network customers international and domestic roaming services cut-off. After this, the mobile phone by the analog to digital development, including the rapid development of GSM and CDMA digital mobile phone standard worldwide. In the 1980s, the global mobile phone business is growing very fast. The late 1980s, the global use of wireless telephone terminal users, the number of annual growth rate of 40 percent, far more than the same period the annual growth rate of fixed line telephone users.
Macro environmental factors of the mobile phone industry. Political - legal factors. Specifically, some government action restrictive role in the activities of the enterprises, but some government policy guidance and a positive impact on the enterprise. In accordance with Chinas WTO accession commitments, December 11, 2004, China canceled the limitations of geography, equity and the number of foreign-invested commercial enterprises in Chinas retail sector is opened to all. So that the domestic retail market capacity is rapidly expanding, industry, competition is fiercer than ever. Generally speaking, in the case of macroeconomic development, market expansion and increased demand for business development opportunities. Beginning in 2003, Chinas central governments macro-control targets are mainly concentrated in four areas. It is the high performance heat dissipation chip of cell phone jammer .
Gross domestic product (GDP) growth in the number of degrees, the general price level, the urban unemployment rate or the level of employment, the international balance of payments status.

Useful for liquids level detection and proximity devices, Up to 50 cm. range, optional relay operation

This circuit is useful in liquids level or proximity detection. It operates detecting the distance from the target by reflection of an infra-red beam. It can safely detect the level of a liquid in a tank without any contact with the liquid itself. The devices range can be set from a couple of cm. to about 50 cm. by means of a trimmer. Range can vary, depending on infra-red transmitting and receiving LEDs used and is mostly affected by the color of the reflecting surface. Black surfaces lower greatly the devices sensitivity.

Parts:

R1_____________10K 1/4W Resistor
R2,R5,R6,R9_____1K 1/4W Resistors
R3_____________33R 1/4W Resistor
R4,R8___________1M 1/4W Resistors
R7_____________10K Trimmer Cermet
R10____________22K 1/4W Resistor
C1,C4___________1µF 63V Electrolytic or Polyester Capacitors
C2_____________47pF 63V Ceramic Capacitor
C3,C5,C6______100µF 25V Electrolytic Capacitors
D1_____________Infra-red LED
D2_____________Infra-red Photo Diode (see Notes)
D3,D4________1N4148 75V 150mA Diode
D5______________LED (Any color and size)
D6,D7________1N4002 100V 1A Diodes
Q1____________BC327 45V 800mA PNP Transistor
IC1_____________555 Timer IC
IC2___________LM358 Low Power Dual Op-amp
IC3____________7812 12V 1A Positive voltage regulator IC
RL1____________Relay with SPDT 2A @ 220V switch Coil Voltage 12V. Coil resistance 200-300 Ohm
J1_____________Two ways output socket

Circuit operation:

IC1 forms an oscillator driving the infra-red LED by means of 0.8mSec. pulses at 120Hz frequency and about 300mA peak current. D1 & D2 are placed facing the target on the same line, a couple of centimeters apart, on a short breadboard strip. D2 picks-up the infra-red beam generated by D1 and reflected by the surface placed in front of it. The signal is amplified by IC2A and peak detected by D4 & C4. Diode D3, with R5 & R6, compensates for the forward diode drop of D4. A DC voltage proportional to the distance of the reflecting object and D1 & D2 feeds the inverting input of the voltage comparator IC2B. This comparator switches on and off the LED and the optional relay via Q1, comparing its input voltage to the reference voltage at its non-inverting input set by the Trimmer R7.

Notes:

• Power supply must be regulated (hence the use of IC3) for precise reference voltage. The circuit can be fed by a commercial wall plug-in adapter, having a DC output voltage in the range 12-24V.
• Current drawing: LED off 40mA; LED and Relay on 70mA @ 12V DC supply.
• R10, C6, Q1, D6, D7, RL1 and J1 can be omitted if relay operation is not required.
• The infra-red Photo Diode D2, should be of the type incorporating an optical sunlight filter: these components appear in black plastic cases. Some of them resemble TO92 transistors: in this case, please note that the sensitive surface is the curved, not the flat one.
• Avoid sun or artificial light hitting directly D1 & D2.
• Usually D1-D2 optimum distance lies in the range 1.5-3 cm.