New Circuits Page 264
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It uses the HL-169B-type voice alarm IC A. It can be used for safe, glass doors, car doors and windows burglar alarm and other occasions. When the thieves beat with violence such items that vibration of the piezoelectric ceramic sheet A, crystal thyristor V..
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SOS Alarm centralized control circuit can be used to call a hospital bed, can also be used in multi-storey buildings, dormitories, warehouses and other places of anti-theft alarm. The circuit shown in Figure l3-64. The circuit shown in three-channel..
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It uses reed KR V control thyristor conduction, with 555 integrated circuit path consisting multivibrator as an alarm generator. When the door is closed, the permanent magnet close to the reed switch KR, with normally closed contacts reed contacts open,..
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The double-limit temperature alarm circuit by the temperature detection control circuit, the temperature indicating circuit and sound the alarm circuit, as shown in FIG. Components Selection R1 ~ R5 use 1 / 4W metal film resistor or a carbon film resistors. ..
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The circuit uses a 555 timer wired as an astable oscillator and powered by the emitter current of the BC109C. Under dry conditions, the transistor will have no bias current and be fully off. However as the probes get wet the transistor will conduct and....
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A capacitor Cl and resistor Ri-R3 consisting negative sequence voltage filtration device. Resistors and capacitors to meet the following requirements: Ri Ra-Rz 5.5/C1 (KN) form..
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A simple burglar alarm circuits, sensors pyroelectric sensor IRA-E100SZI. When human movement is detected, the pressure on the electric buzzer alarm whistle. Sensor receives si..
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Alarm interface circuitry. As shown, the two-color light-emitting diode display. When LAi is high level t and LBi is low, the green light-emitting diode display; on the contrar..
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As environmental awareness increases, the electric car has been poured into our family, become an indispensable part of peoples transport. How to prevent the electric car theft..
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As shown in (a), KAi, KA2, KA3 intermediate relay, connected to the outlet end of the low-voltage circuit breakers total. Alarm circuit connected to the backup power supply or ..
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As shown in FIG alcohol detection alarm controller circuit. QM-NJ9 for alcohol gas sensors, if detected the odor of alcohol, the AB-QM-NJ9 between resistance becomes smaller, t..
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As shown in FIG hydraulic oil for automotive LED alarm circuit. The circuit consists of a light emitting diode driver SL322C (IC), integrated voltage regulator circuit CW7809 (..
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As shown in FIG measuring temperature alarm circuit to the Treasury. The device consists of inverting amplifier IC1, comparison amplifier IC2, low-frequency multivibrator IC3, ..
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As shown in FIG weak light alarm circuit. The core of the oscillator circuit for the alarm SCZ07. Its input signal by the potentiometer W, control, output signal photoresistor ..
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As shown in the simplified block diagram of the high sensitivity of the alarm circuit, wherein the photoresistor LDR and three ordinary resistor connected. Thus, when the light..
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As we all know, if the elevator power suddenly fails, the distance distribution room duty officer is not immediately found, this time, the crew was on the elevator might panic...
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As we all know, if the power transformer neutral line circuit, and when the three-phase unbalanced load and can easily lead to electrical equipment (such as household appliance..
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Automatic alarm circuit includes a DTMF Automatic dialing, password control circuit, voice detection and alarm circuit, telephone interface circuit, power supply circuit and th..
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CD4538 is using DIP-16 and SMD-16 packages precision monoflop. With stable performance, fewer required external components, the logic function is strong, the chip integrates tw..
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Children lost a phenomenon often happens, look around, the family should not have brought enormous suffering and economic losses; in addition, also points to unscrupulous child..
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Circuit as shown by the triggering device, monostable delay circuit, the alarm sound generator, audio amplifier circuit, light control circuit, partially blocking the preset ci..
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Circuit for the principle: The alarm circuit consists of two parts, the transmitter and receiver. Figure a shows the transmitter circuit, GT is a smoke break reed switch, usual..
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Circuit inductive burglar alarm circuit from the radio scanning detection circuit, a signal processing circuit and alarm circuit, as shown in Figure 13-43. Radar detected by th..
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Circuit operation principle of the device shown in Fig. Shaped permanent magnet mounted on the door ZT activity, normally closed reed AG mounted on the door frame. Usually ZT c..
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Circuit schematic shown in Figure 1.SCR, R1 and AN SCR trigger switch circuit composed; IC1, R2, VT1, VT2 and BL siren composed of analog circuits. Usually, AN oppression by ho..
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Shown for the precision digital timing control circuit. The controller consists of crystal oscillator circuit, a divider, counting circuit, monostable flip-flops...
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AC has been shown as a fishing converter input circuit ND conversion Tiger Road. In order to check the AC signal and I was shown, it is provided in the input circuit AC DC conv..
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AD7710/7715/7730 multifunction digital sensor signal conditioning ICs. They integrate a digital interface with the control port, a clock generator, a digital filter, A/modulati..
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After the SCM execution, Pl output port to bidirectional input 74LS245 driver chips, the same driver each phase of the digital control, according to the information Pl port out..
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Automatic inspection circuit for multiple detection and control of production equipment, the inspection circuit may sixteen regular inspection of production equipment. It consi..
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Automotive engine pulse points or other sensors to be filtered in the transmission device 3130 CMOS op amp, the op amp is used as a comparator to complete the input conditions...
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Bridge the digital pressure signal conditioner MAX1458 excitation circuit is shown. Using the output DAC3 to change the size of the sensor excitation current IBR, you can achie..
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B sawtooth voltage controlled oscillator First, the output voltage of the comparator is a negative potential maximum. Then the output to the inverting input terminal..
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Timing IC using long RS6445C constitute blocking oscillator As shown in the timing for the introduction of integrated long RS6445C constitute a blocking oscillator. WI and W2 segmentation is used to adjust working time and closed for the time, both of which ..
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A sense of three-point oscillator, also known as Hartley oscillator, the Colpitts oscillator with similar, but the feedback circuit is composed of two series inductor and a shu..
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Adjustable pulse generator circuit Shows an adjustable pulse generator circuit, which is a periodic signal and the pulse width can be adjusted independently of each other and t..
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Application circuit is shown in a complementary sawtooth generator. In the figure, the horse is VT1 base current limiting resistor, the conduction time to prevent excessive bas..
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As shown by the 12kHz 12kHz IF oscillator quartz oscillator, the output level adjustment, level-up circuit and alarm circuit components. It uses a novel single-tuned variable f..
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As shown by the triangular wave circuit composed of two OP, R62 is OFFSET adjustment, R27 for the adjustment of the peak, with the switch to select different resistance obtaine..
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As shown for the excellent performance of the low frequency signal generating circuit. The characteristics of this circuit is leveled good performance, high output power, wavef..
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As shown for the simple high-frequency signal generator. Change the LC resonant circuit inductance with the band switch Sl, you can change the high-frequency oscillation freque..
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As shown in FIG variety of low-frequency waveform generating circuit. The circuit can simultaneously output two waveforms that triangle and square waves. Circuit, a first integ..
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As shown in FIG, VT1 ~ VT11 base bias circuit 11 added to the binary data (high level 1 to low level 0 ), there are 211 2048 combinations. When a bit is low, the corresponding ..
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As shown in the Colpitts oscillator based on the deformed oscillator basis is formed by an oscillator Clapp, Colpitts oscillator with the fundamental differences between the re..
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As shown in the high-frequency signal generator capable of generating a low frequency 1kHz, 465kHz IF signal and the high frequency of 525 ~ 1605kHz, to repair radios or other ..
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As shown in the series resonant circuit using a crystal oscillator. Crystal impedance has a minimum value in the series resonance frequency, thus providing a large feedback amo..
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Audio function generator integrated circuit ICL8038 composition can produce a square wave, triangle wave and sine wave, as shown in Figure 11-8. Electrical resistance and poten..
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Base frequency selection, frequency-selective emitter type transformer coupled oscillator circuit ..
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Birds singing analog signal generator circuit Shown is an analog chirp signal generator circuit. The inverter circuit consists of six CD4069 composed of three oscillators, two ..
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By the 555 IC Ai, capacitors Cl, Cz and metal plate (tablet) M distributed capacitance Co and resistor Ri to ground, R2 consisting self-excited multivibrator; the R3-Rs and C3 ..
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Circuit as shown by the double oscillator is keyed monoflop CC4098, Quad 2-input NAND gate CC4011 and other composition. The circuit is the frequency and duty cycle adjustable ..
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Circuit as shown by the l2kHz the intermediate frequency oscillator, an alarm circuit. It uses variable feedback oscillation circuit, the oscillation frequency is mainly determ..
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Circuit is shown at the same time produce a square wave, triangle wave, sine wave and outputs, especially for electronics enthusiasts and students do with an oscilloscope to ob..
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Circuit shown in Figure select the best working conditions and a reasonable allocation of the temperature coefficient of resonant circuit components. Both ends of the resonance..
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - pulse wave oscillator - blocking oscillator transformer ..
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - pulse wave oscillator - single-junction transistor blocking oscillator ..
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - sawtooth oscillator - use blocking oscillator ..
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Common non-sinusoidal oscillator circuit, waveform and frequency formula - sawtooth oscillator - use multivibrator ..
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As illustrated, 555 and R1, RP1, C1 and other components controlled audio oscillator, f frequency of 1.44/(R1 + 2RP1) C1, illustrated parameters between 600Hz ~ 20kHz, can be s..
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As illustrated, 555 and Rl, RPl, C1 controllable audio oscillator and other components, f 1.44/(R1 + 2RP1) C1, the parameters shown in the frequency between 600Hz ~ 20kHz, can ..
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Charging circuit will rise, especially rechargeable batteries and the charging circuit when a large current charging a higher temperature. LTC4060 external..
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This circuit can be used for large current after use nickel-cadmium batteries, rechargeable batteries, but also as a general low-voltage DC power supply. This circuit by the charging section and the dc output parts. K2 is the fast charge, slow charge selector ..
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A universal rechargeable lithium battery circuit design, applicable to different battery types and number of batteries. This is because both the charger output voltage or curre..
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Adjustment potentiometer RP, can change the charging current. ..
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Adjustment potentiometer RP, can change the charging current. ..
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Adjustment potentiometer RP, can change the size of the DC output voltage. ..
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After some small loss of field magnets can be re-magnetized porcelain filled with homemade simple. Find a scrap of exchanges and contacts, and other models such as CJ10-60 ~ 15..
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After some small loss of field magnets can be re-magnetized porcelain filled with homemade simple. Find a scrap of exchanges and contacts, and other models such as CJ10-60 ~ 15..
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As shown in FIG lithium battery is a constant current charging control board, the figure Q1, R1, W1, TL431 composition precision adjustable voltage regulator circuit. Q2, W2, R..
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As shown is a 12V constant voltage charger. The power supply circuit with the same basic circuit. Resistance Rl 0.2, limiting the role played, the equivalent of increasing the ..
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Bidirectional Control J 7 cases referred to the motor is to increase the degree I had a bit-what is to be achieved. iL Sweet Road 1-62 Figure 1 shows, the motor monkeys move J ..
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By setting the 500 ohm resistor to adjust the circuit, the resistor is part of a fully charged battery. ..
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Can alkaline batteries charging problem, there are two different versions. Some say you can charge, the effect is very good. Some say absolutely can not charge the battery desc..
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Cause when fast charging nickel-cadmium battery temperature, as shown in FIG nickel-cadmium battery fast charger temperature of the control circuit can be provided to detect th..
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Charge amplifier, it is a good punch hit measuring amplifier. This amplifier is actually a negative feedback capacitor having a depth of high-gain operational amplifier input o..
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Charging apparatus shown in schematic circuit, the maximum output current of 20A, the maximum charge voltage of 80V. It can be adjusted from 0V onwards, and therefore capable o..
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Charging circuit diagram personal work For the operating principle ADP3801/3802 charging circuit. ..
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Charging the battery using a slow manner (charging current, long time) is the most economical and safest way. Design the trickle charger should grasp two points: First, the use..
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Circuit 555 as the core to form a astable multivibrator. Oscillation period T 0.693 (R1 + 2R2) C1 Icon parameter corresponding to the oscillation frequency of about 100Hz or so..
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Multi-output power supply circuit (MAX1902) It shows the notebook computer motherboard power supply circuit which uses MAX1902 chip for power control circuit, which can be all the way in order..
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Shown for the multi-output power supply circuit. The circuit uses the transformer secondary winding and 4 respectively 7812,7805,7905,7912 + 12V, + 5V, -5V and -l2V 4 groups independent output voltages. Each group has a separate output voltage switching....
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As shown in FIG circuit, T is auto voltage regulator. Its output fixed input end by a servo motor to automatically adjust the output remains constant.Transistor VTl, VT2: 3DK9C, = 65 ~ 85; VT3: 3AX818, = 60 ~ 80; diode VD2, VD3, VD6 ~ VD9: 1N4002; VD4,..
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300A-18V three-phase thyristor power regulator circuit electrolysis It can output DC 3000A, 18V (adjustable), power supply solution processing. Circuit from the main circuit, trigger circuit, part of the synchronous power, DC power, voltage negative feedback..
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As shown for the single-phase bridge rectifier arms rectifier circuit. The circuit consists of arms cathode (negative electrode) and arms parallel anode (positive electrode) in..
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As shown in FIG inverted to adopt IC1MAX868 and CMPSH-3S consisting of four times the pressure of DC/DC converter power supply. IC1MAX868 which is a type inverting charge pump ..
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As shown in FIG multimeter AC/DC converter circuit automatically. Ordinary digital multimeter by manual operation to complete AC and DC measurement conversions. New DT860D digi..
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Bridge rectifier circuit in the electronic ballast application circuit ..
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A pressure sensor circuit, a pressure sensor is nominal resistance 120n. The amplifier circuit is the use AD521 op amp gain of 100. It consists of Rs/Rc; decision; A/D converte..
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AD7714 circuit constituted by a pressure measurement system is shown in Fig. BP01 is Sensym companys pressure sensors. The BP01 connected into a bridge circuit, from OUT +, OUT..
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ADSP-2103 or ADIs ADSP-2105 is produced by a digital signal processor. AD7714 and the ADSP-2103/2105 interface circuit as shown in FIG. When the output is active ADSP-2103/2105..
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As illustrated, the filtering and amplifying circuit composed of two parts. Wherein the filter MAXIM MAX267 is an integrated company produced, may constitute a low-pass, band p..
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As shown below, this circuit uses BP01-type pressure sensor and op amp MAX4472.BP01 type pressure sensor is specifically designed for the detection of blood pressure, mainly us..
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Bridge sensor output signal precision differential instrumentation amplifier with adjustable gain IC1 amplified send IS0100, IC1s gain is determined by the external resistor Rc..
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CGS-H ceramic humidity sensor constructed low humidity detection circuit diagram . ..
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Circuit shown in Figure 3-165. Start-up time by the time relay KT control. Figure, Hi is the power indicator, H2 for the start lights, H3 for the running lights. ..
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Circuit shown in Figure 3-166. It uses the button control. When start forward, press SB], the motor rotor string frequency sensitive people rheostat RF operation. When the moto..
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A Mitsubishi Pajero car audio, fault phenomenon is silent, and the rest feature to work, the search for the amplifier IC TA8205AH damage. TA8205AH Toshiba company produces 22W ..
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An automobile permanent magnet alternator failure, the phenomenon of cars at night driving, headlights suddenly increase in brightness, then goes out. Analyzing the generator v..
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Anatomy of the two ignition experiments, measuring the three normal ignition, found a common problem, and both ends of the ignition coil has a diode. Why manufacturers do this ..
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Between fixed loudspeaker that period. Its outer diameter must be consistent with the paper tube diameter to facilitate fixed speakers, and in its outer open on a walk trough, ..