Showing posts with label phone. Show all posts
Showing posts with label phone. Show all posts
Sunday, March 29, 2015
Phone Busy Indicator
Have you ever been using the modem or fax and someone else picks up the phone, breaking the connection? Well, this simple circuit should put an end to that. It signals that the phone is in use by lighting a red LED. When the phone is not in use, a green LED is lit. It needs no external power and can be connected anywhere on the phone line, even mounted inside the phone.
Phone Busy Indicator Circuit Diagram
Parts:
R1 3.3K 1/4 W Resistor
R2 33K 1/4 W Resistor
R3 56K 1/4 W Resistor
R4 22K 1/4 W Resistor
R5 4.7K 1/4 W Resistor
Q1, Q2 2N3392 NPN Transistor
BR1 1.5 Amp 250 PIV Bridge Rectifier
LED1 Red LED
LED2 Green LED
MISC Wire, Case, Phone Cord
Notes:
Phone Busy Indicator Circuit Diagram
Parts:
R1 3.3K 1/4 W Resistor
R2 33K 1/4 W Resistor
R3 56K 1/4 W Resistor
R4 22K 1/4 W Resistor
R5 4.7K 1/4 W Resistor
Q1, Q2 2N3392 NPN Transistor
BR1 1.5 Amp 250 PIV Bridge Rectifier
LED1 Red LED
LED2 Green LED
MISC Wire, Case, Phone Cord
Notes:
- This is a very simple circuit and is easily made on a perf board and mounted inside the phone.
- LED1 and LED2 flash on and off while the phone is ringing.
- Do not worry about mixing up the Tip and Ring connections.
- The ring voltage on a phone line is anywhere from 90 to 130 volts. Make sure no one calls while you are making the line connections or youll know it.
- In some countries or states you will have to ask the phone company before you connect this to the line. It might even require an inspection.
- If the circuit causes distortion on the phone line, connect a 680 ohm resistor in between one of the incoming line wires and the bridge rectifier.
Thursday, March 19, 2015
The antenna of cell phone jammer coming out of the open on the top
The antenna of cell phone jammer coming out of the open on the top.
Analysis, despite the physical gift giving gifts at this stage the main form, but with the deepening of Internet applications, users increasingly experience the fun of online gifts, giving virtual gifts will be the next most promising way of gift . Eric suggested that the Internet social networking companies should seize the opportunity for virtual gifts market, the introduction of more personalized products, to enhance the competitive advantage of virtual gifts market. According to a recent release of "2010-2011 Chinas cell phone users to read research reports," the data show that in 2010, research reading cell phone users in China, focused on mobile Internet time is generally 1-2 hours in between, accounting for 27.4%, higher than the proportion of PC users; most users use cell phone s to read a daily frequency of 2-5 times, accounting for up to 47.0%. There exists the power input hole and as well as diversion hole at the bottom of installation box of cell phone jammer .
According to survey data shows that 47.0% of cell phone use cell phone s to read the user to read 2-5 times a day, every day more than 6 times the number of users account for 18.0%, read every day cell phone users accounted for 81.5%, read cell phone use higher frequencies. Analysis, compared with other cell phone applications, cell phone s to read every time duration can be controlled by the user, the result is not due to time experience intermittent decreases, so many cell phone users can read the alternative reading a long time to read, to promote use , the number of users to take full advantage of debris while meeting the needs of the time. According to a recent release of "2010-2011 Chinas cell phone users to read research reports," the data show that in 2010, research reading cell phone users in China, gender and age attributes for the user to read content selection a greater impact. The host of cell phone jammer should be installed on the top inside the box.
Cell phone newspaper, for example, male and female cell phone users to read contents of the reading preferences there are significant differences, men read the report focuses on cell phone news and current affairs, Financial News, female users are biased towards the political news and live entertainment news; more users under the age of 24 Choose entertainment content to read, and users tend to read over the age of 25 finance and economics cell phone report content. Cell phone users choose to read the newspaper to read the content of sex differences.
Read more »
Analysis, despite the physical gift giving gifts at this stage the main form, but with the deepening of Internet applications, users increasingly experience the fun of online gifts, giving virtual gifts will be the next most promising way of gift . Eric suggested that the Internet social networking companies should seize the opportunity for virtual gifts market, the introduction of more personalized products, to enhance the competitive advantage of virtual gifts market. According to a recent release of "2010-2011 Chinas cell phone users to read research reports," the data show that in 2010, research reading cell phone users in China, focused on mobile Internet time is generally 1-2 hours in between, accounting for 27.4%, higher than the proportion of PC users; most users use cell phone s to read a daily frequency of 2-5 times, accounting for up to 47.0%. There exists the power input hole and as well as diversion hole at the bottom of installation box of cell phone jammer .
According to survey data shows that 47.0% of cell phone use cell phone s to read the user to read 2-5 times a day, every day more than 6 times the number of users account for 18.0%, read every day cell phone users accounted for 81.5%, read cell phone use higher frequencies. Analysis, compared with other cell phone applications, cell phone s to read every time duration can be controlled by the user, the result is not due to time experience intermittent decreases, so many cell phone users can read the alternative reading a long time to read, to promote use , the number of users to take full advantage of debris while meeting the needs of the time. According to a recent release of "2010-2011 Chinas cell phone users to read research reports," the data show that in 2010, research reading cell phone users in China, gender and age attributes for the user to read content selection a greater impact. The host of cell phone jammer should be installed on the top inside the box.
Cell phone newspaper, for example, male and female cell phone users to read contents of the reading preferences there are significant differences, men read the report focuses on cell phone news and current affairs, Financial News, female users are biased towards the political news and live entertainment news; more users under the age of 24 Choose entertainment content to read, and users tend to read over the age of 25 finance and economics cell phone report content. Cell phone users choose to read the newspaper to read the content of sex differences.
Subscribe to:
Posts (Atom)