The device as will be explained below, are designed to the extension of the functional opportunities phone devices that enhance usability use of them. All consoles work together with phones telephone networks common areas (urban or rural automatic telephone stations); the respective setting consoles can be applied for vehicles improvised devices telephony [1].
The principle of operation of all consoles based on registration ringing signals, coming to a phone the apparatus and corresponding the processing of these signals. Consoles are made in the form stands for telephone the apparatus and have inductive the connection with the winding of the call. Their operation is not contrary to the requirements of the State inspection of telecommunications, because galvanic communication consoles with phone the network is missing.
Fig. 1
Structural the scheme shown in console Fig. 1. The signal from the induction sensor ID in the magnetic field of the coil call telephone set TA, is amplified by the amplifier and The goes to the driver With F. the signal shaper goes to logical unit LB and then to the Executive the device Yiwu.
Light alarm call
He designed for people with hard of hearing, provides the appearance a light signal at a call to the subscriber (Fig. 2).
Fig. 2
Inductive sensor L1 feature in the magnetic field of the coil call telephone set. AC voltage, emerging on the coil L1 through the coupling capacitor C1 is supplied to the amplifier, made on logic the element DD1.1. In this case the element of the digital chip works in analog (linear) mode [3]. It is achieved by introducing negative feedback DC via the resistor R2. Reinforced in dozens once the signal through the coupling capacitor C2 is input to shaper trigger Schmitt logic elements DD1.2, DD1.3.
The capacitor C2 is required for avoid the constant flow of component output amplifier logic the element DD1.1 to the input of the trigger Schmitt. In the absence of the input DC the output voltage logic element DD1.1 is approximately half of the voltage power (this is ensured by negative feedback through the resistor R2). The threshold triggering of the Schmitt trigger also is approximately half of the supply voltage, therefore, when the direct connecting the output of the amplifier the input of the Schmitt trigger could would be spontaneous switching the last (in the absence the signal on the coil L1). Resistor R3 provides supply voltage low level input trigger in the absence of the input signal, and provides discharge capacitor C2.
From the output of the Schmitt trigger the signal is sent to the high-voltage transistor VT1, who works in the chain the gate electrode the SCR VS1. Feature this method of inclusion transistor is minor power, which is scattered on it. This is because after opening of SCR the voltage between the collector and the emitter of the transistor reduced to 1...2, and the current through it stops. SCR controls the load - lighting a lamp HA1, which indicates an incoming call to the subscriber.
The smoothing capacitor C4 ripple call voltage and eliminates flickering warning lights HA1.
The power of the chip is supplied from parametric stabilizer, in which the elements R10, VD1, NW.
The chip can K561LN2 replace KLN, CLA, CLA or corresponding analogues of series To 176. Transistor VT1 - CT, CT with any letters. SCR VS1 - COOK(L), KU(K-N). Capacitor - km-6, K10-7 (C1, C2), K50-6, K50-16, K50-12 (C3). In the quality of the sensor L1 used coil from electromagnetic relay PC13, passport RS4.523.026. Coil contains 28 000 turns of wire PEL-1 0.05 mm and has impedance is 8 ohms. Length coil - 40 mm also Suitable coil from a similar relay - RCN, RCM. You can apply and homemade coil. The magnetic circuit should run from a steel rod with a diameter of 5....7 mm (for example, conventional nail).
Phone light the detector is assembled on the Board foiled fiberglass, and the fee mounted in the housing dimensions HH mm, made in the form of coasters under the phone. Coil sensor L1 need to be away from the winding call within 40...50 mm.
Establishing device consists in the compilation the resistance of the resistor R1 for provide the necessary the sensitivity. Power incandescent lamps can HA1 range is from 25 to 150 watts.
The motion detector melodic sound
This the console allows you to replace the sharp tone nice the melodious warbling of the Nightingale. Refer to schematic the scheme is available here. The input part the detector sensor, the amplifier and shaper) similar the cascades previous. On the elements R6, R7, VD1, C3 executed a filter that transforms pulsating voltage in permanent.
Logic elements DD1.4 and DD2.1, DD1.5 and DD2.2, DD1.6 and DD2.3 is generators that produce frequency respectively 1000, 10, 500 Hz (approximately). The total signal simulates the singing of the Nightingale. With the output of the logic element DD3.2 sound signal to key the amplifier, running the transistor VT1. The last load is variable resistor R12, is used in the signal a sound emitter HA1.
The elements of the detector plugged in via the capacitor C8, performing the function of the ballast resistance (capacitive the resistance of this condenser AC 50 Hz is about 10 kOhm). Resistor R13 provides discharge of the capacitor after turn off the device from the network. Voltage supply chips and sound radiator removed from Zener and VD2 VD3; capacitors C7 and C10 smooth pulsation of the rectified voltage; a capacitor C9 boosts immunity the motion detector.
A sound emitter VP-1 (HA1) you can replace DAMS-1A, TK-47 or with any other the resistance of the winding DC 60...200 Ohm. Other types of elements and their possible replacement is the same as in the previous device.
The motion detector selection of the number of calls
This the detector, unlike above, begins give an audible signal is not immediately after submission call parcels (for simplicity calls), but only starting from a certain number of them. In other words, the detector like skips certain the number of calls, not reacting to the sound, but only recording in memory. Obviously, that phone call apparatus should be muted.
This device can to apply, for example, the exclusion of income calls from unwanted subscribers. It is known that in average subscriber holds the tube into flow 4...5 rings (this is enough called party came to the phone and answered), and then gives the end, returning the receiver apparatus. If the alarm device to configure the mode of ignoring this the number of calls, call only subscribers who reported "secret" and that will be keep the phone within 6 and more calls. Another possible use case such device - setting priorities in the two parallel United telephone devices located in different rooms, in this if one of the two phones works in conjunction with the alerter.
When you are prompted in line ringing parcels first reacts to them only the first phone-it rings a bell. Employees in this the room, pick up the phone. If in the room where the the first device is unoccupied or no one wants to pick up the phone, then after some time is starting to sound the detector is mounted next to the second telephone apparatus. The second staff the room pick up the phone. Conveniently to use the alarm when in the first room is the head and arrangements should take up first, and the second the room is.his subordinates. If the second room received a call means, the boss is not in place, and have pick up the phone. In this part call goes unnoticed employees in the second room and not distracting them from their work. Possible other areas the use of the indicator.
Principal the scheme can be found here. Input cascades, sound generator signal source and power-exactly the same as in the previous device. When the unit is connected to the network and if there is no signal on the sensor output L1 logic element DD1.2 there is a voltage a high level. Begins charging the capacitor C4 through resistor R9. After 10 to 15... the voltage on the capacitor reaches the switching threshold logic element (about 5 In). Acting on the input R of the counter DD3, this voltage will install the counter to its initial state, wherein the outputs counter - voltage low level. The low voltage level received on pin 4 logic element DD4.1, prohibits audible signal on the input element DD4.2. The detector is suspend mode.
When you receive AC the magnetic field in close sensor output L1 logic element DD1.3 arise rectangular the pulses. Capacitor C4 is quickly discharged through the resistor R8 and diode VD2, and the input R of the counter there is a voltage low level, which causes the chip DD3 in counting mode. For the pause time between two calls (4...5) the capacitor C4 no time to recharge via resistor R9 to the voltage switch, so chip DD3 works in the counting mode all the time served calls.
Resistors R6, R7, capacitor C3, diode VDl work in the integrating circuit, which converts packs rectangular pulses, taken from the output of the logic item DD1.3, in a single the momentum. Diode VD1 provides quick charging of the capacitor Sz voltage high-level from the output of the logic element DD1.3.
Thus, when applying a call to the input of the logical item DD1.4 operates the high voltage level, and the output of this element is the low voltage level. Since at the input CP of the counter switched positive the voltage drop, the state change counter will occur at the end the first call. On the first the counter output (pin 2) set the voltage a high level.
When a voltage high-level output the counter is connected to the movable contact of the disk switch SA1, the same the voltage will be fixed at the entrance CN counter. This will set the counter in the storage mode, ie the pulses at the input CP not already will change the state of of the counter. At pin 3 chip DD4 set the high voltage level, and with the appearance of subsequent calls will start to sound sounder HA1 in the device. Sound signals will sound until, until the called party does not pick up the receiver of your device or while the caller is not stop giving signals call. In this case the device will return to the initial state.
The device is assembled on a printed Board. The case is exactly the same, as for the light the motion detector. On the side wall withdrawn handle the variable resistor R14 and pen disk toggle SA1 (used switch MPN-1 to 11 of the regulations).
In the manufacture of consoles it should be remembered that they have a galvanic connection to the network, therefore, a thorough insulation axis variables resistors and disk switch. The case be sure to make use of non-conductive material. When establishing devices it is desirable to use the power source 9...10 V, having a galvanic connection with network, or use an isolation transformer.
Literature
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