Mobile phone ringing indicator light. Telephone call indicator light Telephone call indicator light diagram

The alarms do not require connection to a 220 Volt network!!!

Telephone and doorbell indicator light "TC-01 mini". Intended for use by people with hearing impairments. It will be indispensable in cases where the sound signal of a telephone call may disturb others. It is possible to use the alarm in noisy rooms and in other cases. The ultra-bright LED will ensure that a phone call is indicated even in bright sunlight. The alarm is installed in any convenient place - corridor, kitchen, children's room, near the TV.

Model "TS-01 mini"

NEW MODEL

Main settings

• Ultra-bright new generation LED ( COB Light-emitting diode)
• Low power consumption
• Wall and tabletop installation
• The length of the telephone wire is at least 1.2 m
• Power - 3 elements AAA/LR3
• Overall dimensions - 7 x 2.5 cm
• Technological packaging

* 3, 5, 10 meters

1690 rub.

Telephone and doorbell indicator light "TC-01". Intended for use by people with hearing impairments. It will be indispensable in cases where the sound signal of a telephone call may disturb others. It is possible to use the alarm in noisy rooms and in other cases. 48 ultra-bright LEDs provide phone call indication even in bright sunlight. The alarm is installed in any convenient place - corridor, kitchen, children's room, near the TV. An additional magnetic holder allows you to attach the device to a metal surface.

Model "TS-01"

Main settings

• Ultra-bright, energy-efficient LEDs
• Two glow modes - Economy/Norm
• Doorbell indication**
• Low power consumption
• Wall and hanging installation
• Installation on a metal surface using magnetic holders
• Easy connection to a telephone line
• Power - 3 elements AA/LR6
• Overall dimensions - 15 x 3.5 cm

* It is possible to supply the alarm with a long telephone wire 3, 5, 10 meters

**Doorbell indication is possible whenusing an additional adapter, alsoByrequires installation of a separate door buttonbell at the front door

2520 rub.

Telephone call indicator light "TS-02". Designed for light indication of a telephone call. Recommended for use by people with hearing impairments. Used in cases where the sound signal of a telephone call may disturb others. Shockproof and waterproof housing.

Model"TS-02"

Main settings

• Ultra-bright LED element of the latest generation
• Two operating modes - Economical/Normal
• Low power consumption
• Waterproof and shockproof case construction
• Magnetic holder for installation on a metal surface
• Easy connection to a telephone line
• The length of the telephone wire is at least 1.2 m*
• Power - 3 elements AA/LR6
• Overall dimensions - 6 x 23 x 3 cm

* It is possible to supply the alarm with a long telephone wire 3, 5, 10 meters

2520 rub.

Light and sound telephone call indicator "TS-03". Designed for light and sound indication of a telephone call. Recommended for use by people with hearing and vision impairments. It is used in cases where the sound signal of the telephone is not informative enough. It has a shockproof and waterproof housing. The alarm can be connected in any convenient place (corridor, kitchen, another room), or in parallel with a telephone set. Can be used in noisy industrial areas.

Model "TS-03"

Main settings

• Super bright LED elements
• Low power consumption
• Sound emitter type - piezoelectric
• Audio signal level up to 110 dB
• Possibility to turn off the sound signal
• Splash-proof and impact-resistant housing construction
• Convenient hook for hanging
• Easy connection to a telephone line
• The length of the telephone wire is at least 1.2 m*
• Power - 3 elements AA/LR6
• Technological packaging

* It is possible to supply the alarm with a long telephone wire 3, 5, 10 meters

2990 rub.

Sound signaling device for telephone call "TS-04". Designed for audible telephone call signaling. Recommended for use by people with hearing impairments. It is used in cases when the sound signal of a telephone call is not loud enough. Can be used in noisy rooms.

Model "TS-04"

Main settings

• Audio signal level up to 110 dB
• Sound emitter type - piezoelectric
• Mute button.
• Low power consumption
• Overall dimensions - 7 x 13 x 5 cm
• The length of the telephone wire is at least 1.2 m*
• Power - 2 elements AAA/LR3
• Overall dimensions - 9 x 3 x 2 cm

* It is possible to supply the alarm with a long telephone wire 3, 5, 10 meters

1150 rub.

Who hasn't had to wake up at two in the morning from an unexpected phone call? Of course, you can turn off the phone call at night, but only then for some reason you forget to turn it on.

To prevent your phone from disturbing you at night, you can replace the phone call with a regular incandescent lamp. Unless the lamp is very bright and doesn't shine directly into your eyes, it won't wake you up. A light attachment for your phone will be useful not only at home, but also in the office. Especially where it is very noisy. But the light attachment is especially useful for people with hearing loss.

In telephone set-top boxes, it is very important to ensure galvanic isolation between the telephone line and the household electrical network. This can be done in different ways, for example, using optocouplers. However, experience shows that optocoupler-based attachments turn out to be too complex. It is much easier to make a signaling device using a conventional electromagnetic relay.

The proposed circuit of a light attachment for a telephone (Fig. 1) is very simple. It does not require scarce parts, and even a schoolchild can assemble it. The bell signal passes through capacitor C1, is rectified by the diode bridge VD1 and enters the relay winding K1. The relay is activated and closes the contacts of the incandescent lamp. Capacitor C2 smooths out the pulses of the rectified bell signal and eliminates relay bounce during a call and when dialing a telephone number. The VD2 diode is needed to ensure that the lamp shines at full intensity. If full brightness is required, it can be removed from the circuit.

But what if the set-top box needs to switch high power and light lamps in several rooms at once? The relay contacts may not withstand the increased load. In this case, the attachment must be supplemented with an “amplifier” (Fig. 2). The contacts of relay K1, instead of a lamp, are connected to the control electrode of thyristor VS1. When the relay is triggered, voltage is applied to the control electrode of the thyristor, the thyristor opens, and the lamp lights up at full intensity.

If the lamps need to be lit at full power, use the circuit shown in Fig. 3. Here the thyristor is included in the diagonal of the diode bridge VD1...VD4.

Details. Capacitor C1 (Fig. 1) - any paper, for example MBM. It is advisable to use paper or film capacitor C2. In extreme cases, electrolytic will do. The VD1 diode bridge can be replaced with four separate rectifier diodes D226D, KD102A, KD105B and others. The VD2 diode must be designed for a reverse voltage of at least 350 V and the current of the lamp used. Relay K1 - with a winding resistance of about 1000 Ohms, an operating current of no more than 10 mA and switching contacts for 220 V. Currently, the main relays on sale are Chinese-made, without markings on the body and without any passport data. If you managed to buy just such a relay, measure its operating current. Excessive current can be reduced by weakening the armature spring or removing unused contact groups from the relay. Conventional electromagnetic relays click quite loudly. The set-top box will become silent if you use a reed switch relay.

In this case, the use of an “amplifier” becomes mandatory, since the contacts of the reed relay will not withstand the lamp current.

In “amplifiers” (Fig. 2 and 3) you can use thyristors KU201K, L; KU202K...N and any rectifier diodes designed for a reverse voltage of at least 350 V and the corresponding lamp current.

Setting up. When setting up the circuit, the following circumstance must be taken into account. The ringing voltage on a telephone line greatly depends on the number of telephones connected to it. If there are too many connected devices, the ringing voltage will be insufficient and the set-top box may not work. To prevent telephone sets from overloading the line, you need to turn off ringers. Some telephone models use electromagnetic bells that have a mechanical switch. When such a bell is mechanically turned off, its coil remains connected to the telephone line and strongly shunts it. It is advisable to equip such devices with an electric bell switch or to turn off the bell altogether. If the relay rattles when a call is received or a number is dialed, increase the capacitance of capacitor C2.

The light attachment can be combined with a device that extends the life of incandescent lamps.

The phone call indicator light can work instead of or simultaneously with a phone call. It will be useful for older people with hearing loss, and will also relieve telephone “trills” at night. The device will be simply necessary if a small child sleeps in the apartment.

Industrial set-top boxes for similar purposes are unreasonably expensive, and the diagram presented in the magazine "Radio" (9/1992) has significant drawbacks: the indicator is activated both during a conversation and when dialing a number, consumes electricity from the network in standby mode, and is inconvenient to connect to the telephone.

The proposed devices are free from all these disadvantages. The article provides three options for implementing such a console. All circuits do not consume energy in standby mode, do not operate when talking or dialing a number on the SLT, and long-term operation of the devices has shown their high reliability.

Telephone call indicator on thyristor and relay

The first circuit (Figure 1) is connected to the telephone line anywhere in parallel with the telephone and does not affect its operation due to the high input resistance.

If there is a ringing signal in the line, it is rectified at element VD1 and supplied to a reed relay with an operating voltage of 27 V - RES55A RS4.569.601 (RS4.569.606) or RES55B RS4.569.626 (RS4.569.631), which, when triggered, turns on the thyristor VS1.

Rice. 1. Schematic diagram of a telephone call indicator light using a thyristor and relay.

The circuit can be further simplified if, instead of the VD2 diode bridge, one diode is used, connected to the thyristor in series with the load. Then the brightness of the lamp will decrease and the glow will become slightly pulsating (which is not significant), since it will only operate on one half-cycle of the mains voltage.

All elements of the circuit are placed on a single-sided printed circuit board with dimensions of 67x55 mm (see Fig. 2) or can be connected by volumetric mounting inside the telephone body.

Rice. 2. Printed circuit board for telephone ring indicator circuit.

In this case, switch S1 is installed on the housing (see Fig. 3), and instead of capacitor C1, a capacitor available in the telephone set in the bell circuit can be used if its capacitance is at least 0.6 μF.

Rice. 3. Option for connecting the light indicator circuit when placing it inside a telephone: HA1 - telephone call; SA1 is a switch. connected to the handset position lever.

Capacitors used in the device: C1 - MBM or similar for 160 V; C2 - K50-6 for 50 V. The VD1 diode matrix can be replaced with KTs405B, V, G, D. The use of other types of relays is unacceptable, since they can overload the telephone line when a call signal is active.

If installed correctly, the device does not require configuration.

Call indicator circuit based on KT117A

The second circuit (Fig. 4) is assembled using a neon lamp (HL1), a transistor self-oscillator (VT1) and a triac switch (VS1).

Rice. 4. Schematic diagram of a telephone call indicator on a KT117A transistor.

A feature of a neon lamp is its ability to pass current (when it lights up) when the voltage across it exceeds 90 V, which allows it to be used as a threshold element. The call voltage amplitude on the telephone line exceeds this value. Other types can also be used as HL1, for example TN-0.5.

A self-oscillator is assembled on a unijunction transistor, generating short pulses to open a triac switch. If the polarity of the pulse coming to control VS1 is incorrect, the triac will not open (when setting up, you will have to swap the pins on one of the T1 windings).

Resistor R1 allows you to adjust the sensitivity of the light indicator so that it does not work when dialing a number on your telephone.

Rice. 5. Printed circuit board for the second version of the call alarm.

The PCB topology for the circuit is shown in Fig. 5. The design uses the following parts: capacitor C1 type K52-1B, C2 type K10-17, resistor R1 type SP4-1, the rest - type C2-23-0.5. A triac would be suitable for any other, less powerful one.

Transformer T1 is wound with PELSHO-0.18 wire on a ferrite ring M4000NM1 of standard size K16x10x4 mm or a ring M2000NM1 - K20x12x6 mm and contains 1 - 80 turns, 2 - 60 turns in the winding.

Before winding, the sharp edges of the core must be rounded off with a file. Otherwise they will cut the wire. After winding and impregnating the coil with varnish, you must make sure that there is no leakage between the windings, as well as the windings and the ferrite of the frame. You can use any ready-made transformer with similar parameters.

The third version of the bell signaling light

The third circuit (Fig. 6) is similar in principle to the one described above, but it uses a zener diode VD2 as a threshold element, and in addition to the light, there is a switchable sound indicator.

Rice. 6. Schematic diagram of the telephone call indicator (option 3).

The circuit is not critical to parts and does not require configuration if assembled correctly.

When connecting circuits to a 220 V network, it is advisable to observe the phasing shown in the diagram. This will eliminate the possibility of interference entering the TL (at the moment EL1 is turned on) through the isolating pulse transformer T1.

Light - ringing indication of a mobile or landline phone

Incoming call indicator light will be useful for people with hearing loss, as well as in any other cases when silence is necessary, for example, if a small child is sleeping in the apartment. There are also the opposite situations - when the room is very noisy and the bell simply cannot be heard - various workshops, workshops, etc. Schemes are offered for both landline telephones and any mobile phone. The phone call indicator light can work instead of or simultaneously with a phone call. The devices do not have such disadvantages as operation during a conversation and when dialing a number, consumption of electricity from the network in standby mode, and inconvenience of connecting to the line. The circuits are small and simple, can be built into the phone itself, do not consume energy in standby mode, and long-term operation of ring light indicator devices has shown their high reliability.

At the beginning there are several schemes for indicating an incoming call for a landline telephone.

The first circuit is connected in parallel with the telephone to the line anywhere and does not affect its operation due to the high input resistance.

When a ringing signal appears in the line, it is detected at element VD1 and supplied to a relay (reed switch) with an operating voltage of 27 V. For example, RES55A RS4.569.601 (RS4.569.606) or RES55B RS4.569.626 (RS4.569.631), which turns on the thyristor when triggered VS1. The circuit can be further simplified if, instead of the VD2 diode bridge, one diode is used, connected to a thyristor in series with the load. Then the brightness of the lamp will decrease and become slightly pulsating (which is not significant), since it will only operate on one half-cycle of the mains voltage. The advantage is that in this mode the lamp will never burn out and the slightly flickering bell alarm attracts more attention. All elements of the circuit are placed on a single-sided printed circuit board with dimensions of 67x55 mm or can be connected by volumetric installation inside the telephone body. In this case, a simple switch S1 is installed on the case, and instead of capacitor C1, a capacitor available in the telephone set in the bell circuit can be used, if its capacitance is at least 0.6 μF.

The design and printed circuit board of the first bell signaling light circuit.

Capacitors used in the device: C1 - MBM or similar for 160 V; C2 - K50-6 for 50 V. The VD1 diode matrix can be replaced with KTs405B, V, G, D. The use of other types of relays is unacceptable, since they can overload the telephone line when a call signal is active. If installed correctly, the device does not require configuration.

Second indicator light circuit assembled on a neon lamp (HL1), a transistor self-oscillator (VT1) and a triac switch (VS1). A feature of a neon lamp is its ability to pass current (when it lights up) when the voltage across it exceeds 90 V, which allows it to be used as a threshold element. The call voltage amplitude on the telephone line exceeds this value. Other types can also be used as HL1, for example TN-0.5.

A self-oscillator is assembled on a unijunction transistor, generating short pulses to open a triac switch. If the polarity of the pulse coming to control VS1 is incorrect, the triac will not open (then when setting up, you need to swap the terminals on one of the T1 windings). Resistor R1 allows you to adjust the sensitivity of the indicator light so that it does not work when dialing a number. The PCB topology for the circuit is shown in the above file (zip 25Kb). The design uses the following parts: capacitor C1 type K52-1B, C2 type K10-17, resistor R1 type SP4-1, the rest - type C2-23-0.5. A triac can also be used with any other, less powerful one. Transformer T1 is wound with PELSHO-0.18 wire on a ferrite ring M4000NM1 of standard size K16x10x4 mm or ring M2000NM1 - K20x12x6 mm and contains 1 - 80 turns, 2-60 turns in the winding. Before winding, the sharp edges of the core must be rounded off with a file. Otherwise they will cut the wire. After winding and impregnating the coil with varnish, you must make sure that there is no leakage between the windings, as well as the windings and the ferrite of the frame. You can use any ready-made transformer with similar parameters.

The design and printed circuit board of the second bell light signaling circuit.

Another simpler, more reliable and cheaper one telephone call light signaling option. does not require external power or even a housing. The device consists of only one part - a neon indicator with a built-in resistor and threaded fastening (for example, N-803Y, N-804Y, N-808Y). The indicator is connected in parallel to the telephone set.

The principle of operation of the device is that at the moment of an incoming call, the voltage in the telephone line rises from 65 to 160 volts, which leads to the ignition of a neon lamp. The indicator does not disrupt the operation of the telephone network, because Thanks to the built-in resistor, the current through the indicator at the time of the call does not even exceed 1 mA.

The incoming call indicator can be installed directly in the telephone body. During installation, the phone should be disconnected from the network.

Unlike incandescent lamps, which have a resource of around 1000 hours, neon cold cathode lamps have a resource of at least 25,000 hours of continuous operation. It is worth noting that the operating mode of the incoming call indicator corresponds to frequent switching on and off, which significantly reduces the service life of incandescent lamps.

The following diagram is designed for light indication of an incoming call on any mobile phone.

The call is indicated regardless of whether the sound signal and vibration alert on the mobile phone are turned on or off. The device is compact, located next to the phone and is triggered by electromagnetic radiation that appears when the mobile phone receives a call.

R1- 100 kOhm R2 - 3.9 kOhm R3 - 1 MOhm
C1, C2 - 100N C3 - 220 x 25 V
D1 – indicator LED, better ultra-bright, D2 - 1N5819
Q1 - BC547
IC1 - 7555 or TS555CN timer
L1 – 10 µH

The electromagnetic field sensor is coil L1. The signal received by the coil is amplified by transistor Q1 and triggers a multivibrator assembled on an integrated timer chip IC1. An AC voltage doubler, assembled on a Schottke diode D2 and a capacitor C3, which is also a detector, produces a voltage of about 3 volts, which lights up the indicator LED D1.

Coil L1 is made on a mandrel with a diameter of 50 mm. and contains 150 turns of any enameled wire. After winding, the coil is removed, fastened with threads and placed inside the device along its perimeter.

Any integral timer with appropriate correction circuits, but it must be CMOS, otherwise it will not start from a 1.5 V supply. Any Schottke diode, for example, VAT46, can work in place of D2.

The device is powered autonomously from one 1.5 V cell. For example, one AA cell or even a disk battery from an electronic watch and calculator. A power switch is not provided, since all elements of the circuit operate in key mode and consume current (in standby mode) no more than 200 μA. If you wish, you can add. When installed correctly mobile phone ring light alarm device works immediately, does not require adjustment.

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Almost everyone has a mobile phone today. In some life situations, you need to find out if there is an active mobile phone nearby, for example, during exams. Or notify a hard of hearing person about the arrival of an SMS. For these cases, we need a mobile phone ringing indicator. Such a detector can be easily assembled with your own hands based on a simple circuit, even with basic amateur radio skills.

The main highlight of this circuit is its application for cell phone signal detection. The mobile phone signal travels in the frequency range from 0.9 to 3 GHz. Schottky diodes have one interesting feature that makes it possible to rectify low-frequency signals with low noise levels. When an inductor is placed near an RF signal source, it receives the signal through mutual induction. This signal is rectified by a Schottky diode and further along the chain it is amplified. After this, the signal is suitable for powering the indicator light, which in this particular design is an LED. Below is a drawing with a schematic diagram of a simple mobile phone ringing indicator. The device is powered by 12 volts DC

Inductor L1 = 10 µH;
Resistors: R1 = 100 Ohm; R2 = 100 KOhm; R3 = 3 KOhm; R4 = 200 Ohm; R5 = 100 Ohm; R6 = 10 Ohm;
Capacitor C1 = 100 nF
Transistor Q1 = BC547
Operational amplifier IC1 = LM339

The input detection part of the circuit consists of a diode, an inductor, a capacitor and a resistor. D1 type BAT54 performs the detector function and rectifies the low frequency AC signal. Capacitance C1 is used to filter AC noise. Resistance R1 is required as a load.

The second part of the design is the amplifier circuit, the basis of which is bipolar transistor Q1, connected according to a common emitter (CE) circuit. This chain is required to amplify a weak signal to the required level.

The signal is then sent to a comparator based on the LM339 operational amplifier. Its inverting input receives a reference voltage through a voltage divider. Since the amplifier's output voltage is still quite low, the reference voltage is set low at around 4 V. This can be achieved by selecting a 200 ohm resistor and a 330 ohm potentiometer to adjust the voltage. An output impedance of 10 ohms is used to limit the current.

The antenna is a piece of copper wire about 15 cm long. The signal from it goes to capacitors C1 and C2. Then from their common point it goes to the inverting input of the op-amp type CA3130. The non-inverting input is connected to the divider on components R1, R2.

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Capacitance C4 is a ceramic disk with leads 18 mm long and 7.5 mm apart. It forms a loop antenna for the frequency band on which cell phones operate. An op-amp with a MOSFET transistor at the input sets a high input resistance, high operating frequency and low input current. A 10mV signal at the input provides full swing-to-peak output voltage. Capacitance C4 paired with inductance generates the input current of the op-amp, which turns into the control output voltage of transistor VT1.

The glow of the LED in the emitter circuit of transistor VT1 indicates the presence of a switched-on mobile phone near the detector. At the same time, from the collector, through the separating capacitor C7, the signal is sent to pin 2 of DD1, thereby starting the operation of a multivibrator built on the NE555 timer. As a result, the buzzer connected to pin 3 of the NE555 timer emits a sound signal.