Top Circuits Page 60

This circuit could be used to drive a monostable relay by a singol momentary switch. Powered by 24 Volts it works for a 12 Volts relay. When the button is pressed Q1 is energized and the capacitor charges, while the relay coil is shorted. Once the button is....

This circuit turns on a relay when two buttons are pressed at the same time.The relay backs off after few seconds, then the buttons have to be released and pressed again. This feature is often required in industrial safety...

It uses a relay control. The voice switch is characterized by: when the first clap, then through the load (lights); when the second clap, cut off the..

When the input voltage is 170-260V AC range, the output AC voltage 187-231V range. Transformer ratio is k = 24/220 = 0.11...

FET relay circuit 2 It is actually a JS-20 time relay circuit. SA before the switch is closed, the relay device KA tends to release state. After SA closed circuit delay start, ..

Discharge time relay circuit The timer field effect tube, and therefore have a high timing accuracy, timing and so long. When the R3-IOOOMfl, C 200VF when a delay time of 8h. P..

When the input is disconnected, the transistor VTi conduction, VTz cutoff relay KA released. When the input is shorted. VTi deadline, VTz conduction, KA pull...

Operating power protection devices, there is a DC power supply operating power and AC operation into two categories. ..

Shown for the brightness control relay circuit. Resistors R1, R2 and R3 form a light-sensitive resistor voltage divider circuit,..

Five of the transistor time relay circuit b (a) for the exchange of time relay, Figure (b) is a linear flow of time following, the use of only two different power supply,..

The multifunction circuit mainly refers to it can be "delayed pull", "time release", "delayed cycle" conversion three operating modes...

Motor winding is delta transposition capacitance cl -C -3G DC Lan speed generator and three-phase asynchronous motor coaxial cs mechanically connected by a field winding powered disabilities 10V...

Relays AC arc welding machine load since the three-way power circuit shown in Figure 522 relay KA selection type, 24V; time relay KT selection JS7 Ying, 0.4-180s...

JG series of photoelectric relay circuit. For the circuit to work reliably, we have adopted the Schmitt trigger circuit. These circuits are similar, when there is light incident on the photosensitive member, the internal resistance becomes smaller, the....

It uses two LM358 op amp A2 and Ar as an upper limit and a lower limit voltage electrical voltage measurement comparison control circuit. RPi adjustment potentiometer and RP2, can change the upper limit voltage and lower voltage setting...

Competition is ~ relay contacts contactor control systems often encounter problems, too much trouble to deal with, and sometimes need to add a lot of elements to add. However, if the use of negative temperature coefficient thermistor (NTC) delay switching..

Three single-junction transistor time relay circuits It uses pulse charging circuit, and therefore can be done for a long time delay, maximum up to tens of minutes. FIG unijunctions VTi and other groups into the first stage delay circuit, charging the..

A relay control circuit It shows the relay control circuit. There are many in the microwave switches, such as the power supply switch is turned on can be achieved, switch off p..

A relay-style five electronic Responder Responder group circuit. The circuit has a self-locking, sound and light display, monitor time and other functions. Large ones may be in..

A transmitting circuit, power, infrared light-emitting diode emits light receiving circuit shown in Figure, receives infrared light transistor 3DU5, the received signal output ..

After the turn-off circuit is first applied to the next KA KA, intermediate interval required less than Is, this is because when the time is up to 3 times the charge time const..

As a photoelectric switch with photoresistor circuit, the sensitivity is very high, as shown for the light control relay. At low illumination, VT nonconductive; when there is l..

As shown below, the following figure is the use of a relay or the like of the starting circuit. Power input access resistance R, R role there are two, one: to prevent boot when..

As shown in FIG relay is non-inductive analog circuit theory. working principle: 220V power supply via a load RL, R1, D1 ~ D4, ZD1, as Q4, Q3 in turn provide positive and negat..

As shown in FIG relay the delayed release operational amplifier circuit. When the power switch, the inverting input terminal of the operational amplifier is added resistor 4.7k..

As shown is composed of a transistor relay delay pull circuit. Just power, 16 F capacitor voltage is zero, two transistors are off, the relay does not operate. With 16 F capaci..

As shown relay delay pull transistor circuit. Just power, 16 F capacitor voltage is zero, two transistors are off, the relay does not operate. With 16 F capacitor charge, over ..

As shown, the circuit by the sound detection circuit and the monostable trigger circuit, the actuator for the relay. VT1 complete input audio signal amplification, when the sig..

By cross-connect telephone ringing circuit, when the phone rang, the circuit closes the relay. It uses the delay in contact, thus to drive any bells, sirens, buzzers or lights...

Charging time relay circuit 2 It is a long delay circuit. When the capacitor C is 5000yF, the delay can be up to 1. 3h. By transistors VTi and regulator VS2, VS3 group as a con..

Circuit by the delay loop, discriminators, output circuits, power and lights of five parts. Part of the power regulator by resistance R, and the regulator vs constituted power ..

Circuit shown in Figure 3-13. Figure, RC surge absorption circuit is, R, zinc oxide varistors (such as MY31 type, MYH12 type, MYH20 type, etc.), an overvoltage protection devic..

Circuit shown in Figure 3-159. The circuit uses complement each other three times and three relay contacts, followed by the automatic removal of the rotor circuit resistance le..

Circuit shown in Figure 3-161. Figure, the first stage starting current detection by the current relay KIi Ri in series with the second stage starting current relay KI2 detecte..

Circuit shown in Figure 3-162. in graph. SBi is forward the start button, SBz to reverse the start button, SB3 for the stop button. Start switching resistance levels are contro..

Circuit shown in Figure 3-49. The circuit autotransformer out of operation by the time relay KT control. KT delay time is equal to the motor start-up time. Circuit shown in Fig..

Circuit shown in Figure 6-24. Both ends of the relay coil in parallel with a resistor Rf or auxiliary diode VD, is equivalent to power after a short circuit coil core increase,..

Figure 4-52 (a) for the two-phase wiring, DC operation; Figure 4r52 (b) for the two-phase current differential wiring, AC operation. ..

This circuit provides a delayed visual indication when a door bell switch is pressed. In addition, a DPDT switch can be moved from within the house which will light a lamp in the door bell switch. The lamp can illuminate the words "Please Wait" for anyone....

This very simple and self-powered device was conceived to allow a person to monitor if someone has rung his home door-bell when he was out. As most door-bells use 12Vac supply, the circuit must be simply connected to the two door-bell-coil leads...

Reverse engineered circuit diagram of a commercial Electronic Bird. This one was built into a plastic christmas ornament and runs off a 9V battery. Note that L1 is actually just an audio transformer with an unused secondary winding...

Delay electronic doorbell circuit - touch doorbell amplifier circuit ..

The device described here does just that. The circuit connects to the doorbell circuit - taking power from the 18 VAC from the doorbell transformer and switching power to the doorbell circuit most of the day. The user interface is a pushbutton, a toggle....

In all the houses exist the bells in the door. All want, they have the possibility of being possible to change the intensity, the tone of sound. With this circuit we have this possibility. With the materials round the gates, we can change the sound. For the....

M1 is a clamp connected to the 24V (dc or ac) power from the gate opener. The diode bridge rectifies the alternate voltage (should the opener use dc current, it merely adjust the positive and negative rail to match circuit polarity), in order to get the....

The operation of a 303MHz circuit has been covered in our project WIRELESS DOORBELL. We are not going over how the circuit works but explain the importance of some of the components and how they effect the range. The most critical component is the....

When the door is pushed, you hear a whisper that "slide up" to a higher frequency. The oscillator frequency is determined by AF coupling capacitance, C 1 and the value of the resistor connected between the base of IQ and the earth. This resistance, RBG is....

A very simple and useful electronic bell circuit can be made using this schematic circuit diagram. This electronic bell circuit can be used as an doorbell or even for an alarm circuit . This electronic bell circuit use just few transistors and other few....

L a few custom IC 66} began to slow music. When the song ends, no electricity flows through the thyristor, the thyristor then cut straight in the light once again shines on the phototransistor Bu [I a mountain. Roundworm parallel Tiao Ping] I XsJ, people....

Circuit with the original m rJ bamboo is also exactly the same way. Trl lose. the secondary disk sV flood-what I guanidine by day. t love grass-flow filter for a light 4Pl iU p..

This version of the Link uses DTMF tones for dialling both internally between handsets, and externally for outside calls. Remember, in some countries, it is ILLEGAL to simply connect unapproved and untested equipment to Telco lines, so avoid the fine and....

The circuit uses a NTE1690 DTMF dialer chip and a PIC16F690 microcontroller. Because this is an IP phone and I cannot just send the DTMF tones over the line, the easiest place to plug in the box is between the phone and the handset. The box has two RJ9 ports....

The Talking Phone Dial Monitor detects the tones generated when numbers are dialed on your touch tone telephone and speaks the numbers that were dialed. This verifies that you dialed the correct number and is especially useful when the keypad is not....

Here is a circuit of a remote control unit which makes use of the radio frequency signals to control various electrical appliances. This remote control unit has 4 channels which can be easily extended to 12. This circuit differs from similar circuits in view....

The so-called charge amplifier means for amplifying the signal charge from the piezoelectric device amplifying circuit . Such high internal impedance ..

Figure C1, C2 is 22pF capacitor connected to 32 MHz .png">crystal oscillator circuit , the use of quartz crystal..

50 impedance as shown in Figure grounds RF2320 linear amplifier circuit configured, input, output, using the transmission line and inductive or capacitive constitute matching n..

4V flat monitor high voltage power supply circuit diagram innocentA wide range of 7 ~ 40V turn 5VDC-DC step-down circuit diagramLight control switch circuit diagram of a safety..

4013 pairs of D-type flip-flop in the astable multivibrator is used as a binary divider output, will produce the output frequency of the multivibrator frequency symmetrical hal..

4 Application examples of applications are given in the figure, it is a Winchester disk drives three-phase brushless DC motor, the operating speed is 3600r/min. Although the or..

3F155 circuit shown in FIG. It uses manual control mode. The figure, a self-excitation braking phase, the other two phases using short brake. Resistor R, the voltage across cap..

33kW and above windlass with Y- conversion power-saving circuit ..

322 monostable multivibrator is cross-connected, when run under non-steady state condition between the oscillator Unicom, it will produce a continuous timing cycle, the same as..

32.768kHz ; In MP3/MP4, mobile phones, laptops and other digital products are provided real-time clock signal generating circuit, which is shown in FIG example, and is mainly c..

3133 circuit shown in FIG. Figure 3-133 (a), dynamic braking (b), (c) the three lines by manually (button) control. Wherein FIG. (A), (b) the dynamic braking DC power supply wi..

300B is a high reliability, excellent characteristics of the power amplifier transistor 6 in the circuit should be designed so that the 300B excellent characteristics of the fu..

The pre-regulator circuit connected to the capacitor, resistor element. Regulator in its conducting direction through the input ..

DC feedback works shown in Figure l-31. In the circuit, R7 connected to the output terminal (the midpoint of static) D of the differential input stage Vr, between the base. Sta..

LA5522 Application Circuit It works briefly as follows: When the supply voltage vcc motor mechanical or negative change when the load changes,..

The circuit designed for teaching demonstration or experiment with it to hear the signal voltage electrocardiogram. ECG signal voltage is..

22kW and below hoist with power-saving circuit Y- conversion circuit shown in Fig. The circuit on the basis of general hoist circuit adds a CJ20-10A exchange contact contactor ..

Typical application circuits Zheng brick SRS5250S constitute processing shown in FIG. 9-41. SRS5250S pin diagram SRS5250S processing circuit may..

IF pre-amplifier circuit shown in distributed-parameter type microstrip circuit. It operates in the frequency band 950-1 470 MFk,..

220V electric vibrator is inserted clip, FU is the fuse. ST is inveterate like device, HLl HL2 are insulation and heating instructions. - Light, EH heater. When boiling, the po..

10 minutes to 2 hours: 100 lines bell - 20 Ogawa, when selected by the multi-gear stick lemma Ge S2 41f system. IC} is self-excited multivibrator. 1C, the ..

Dancing blanket principle is very simple, it is a direct retrofit keyboard or gamepad. Each key on the keyboard and gamepad are actually a switch, as long as these switch on th..

Circuit bias circuit automatic stabilizers quiescent operating point, good thermal stability. Three-pole tube with NPN type (Iceo small)...

In the second equalization circuit connection method, and it works as shown in Figure 1-96. When the potentiometer wiper is moved lc inverting..

Shows the use of the MP3 player memory chip ACU7505 clamor circuit, in order to meet total machine CPU and MP3 decoder core..

DC-coupled multi-stage amplifier circuit a (3) multi-stage DC-coupled amplifier in DC-coupled by a multi-stage amplifier circuit amplifying circuit, if used NPN type transistor..

20W power amplifier circuit shown in Figure 8-3. It consists of a pre-release level, and promote the level of three parts p power level in order to reduce the large phase shift..

20W bus radio and megaphone circuit TDA2005S double low frequency power amplifier integrated circuit design, the front end can be connected to the microphone input or low-frequ..

DC solid state relay (DC-SSR) driving high-power load circuit is shown in (a) below; high power load driving circuit shown in (b) below. ..

DC to 500KHz of 100W amplifier photoelectric starting op amp high input impedance, high gain characteristics, to achieve transformerless output power 100W. Load current up to 1..

1The circuit shown in Figure 3-145. The line uses a rectifier diode rectifier brake for neutral grounding of the three-phase four-wire power supply system. ..

Circuit works: SC3525A for the US General Semiconductor PWM silicon chip, 1 foot of the error amplifier inverting input terminal,..

Pre-amplifiers using current feedback circuit tandem type, its output impedance is approximately DC collector resistance Rc ,, surface..

Transmitter (FZ) winding and a receiver (sz) correspond to the three-phase windings connected, 110V AC voltage supplied to the transmission..

DC current of negative feedback BTL circuit shown in Figure 2, the abolition of the standard BTL circuit C12, C22, the circuit of the DC; resistor R16 and R26 are sampling resi..

It consists of single-junction transistor VTi, resistance Ri, potentiometer RP, capacitor C consisting of relaxation oscillator and amplifier transistor VTz...

1930 ~ 1990MHz as shown in Fig narrowband linear amplifier circuit configured by RF2320. Radio frequency (RF) signal input from 6 feet, after amplified by an amplifier 14 feet ..

Recording signal amplifying transistor circuit Shows the recording signal transistor amplifier, the microphone signal..

Converters and data sampling: Figure 27-47 12-bit A/D converter AD574 and 8031 to the interface circuit. Parameters measured by the multi- way switch after CD4051 strobe to sam..

Current negative feedback voltage divider biased circuit diagram: ..

Current spreading bipolar output when the circuit diagram is as follows: ..

Current-sense amplifier to listen better t use amplifier IC LM1875 current-mode amplifier circuit shown in Figure 5-20. FIG resistor R3 and the speaker BL series resistance t i..

Currently using cookers become a fashion, because fast, clean, pollution, etc., by consumers favorite. Cookers circuit ..

D-200W unique module design, overload, overvoltage, overheating, short circuit, reverse polarity power source, a variety of speakers shock protection feature set within a modul..

DC arc welding machine AC arc welder load loss than the loss of a large load, and therefore all the more necessary to consider installing idling stop motion. (1) DC arc welding..

DC arc welding machine from the second load path of the power circuit shown in Fig. The circuit is only available for a longer downtime (approximately minutes) occasions, does ..