Circuit shown in Figure 3-151. Figure 3-151 (a) of the capacitor banks connected into shape,..

FIG, T is the excitation transformer, R, varistor, rectifier diodes to protect against VDii ~ VD16 breakdown; Rz, C2 resistive capacitor protection..

R "h sampling circuit limit order _" to reduce the sampling resistor. Plus DC voltage level can be placed between the..

Circuit shown in Figure 3-69. It applies to require frequent timing control motor reversing operation of the occasion. Drawing, thyristor Vl,..

In some places, allowing only a specific direction by the motor running, even when the power supply phase sequence..

Circuit works: When normal inspection work where the voltage across the resistor R2 through, RP, partial pressure, as the input signal of IC4. IC4, R3 ~ Rg,..

The thyristor control circuit, with the bridge circuit to control the temperature in the contactor coil KM plus a secondary winding wound as..

Semiconductor thermistor embedded thermal protection element belongs, it is sensitive to temperature,..

When no light, photocell PC1, PC2 was high resistance, Q1, Q2 is turned off the relay contacts K1, K2 relay..

Capacitor start single-phase induction motor circuit configuration, in order to form a two-phase rotating magnetic field, starting winding and capacitor in series, the same magnetic field can be formed automatically...

Motor switch control circuit shown in Figure offers two speeds counter-steering i.e. two speeds in the opposite direction...

Shown in forward and reverse dual interlock control circuit, on the basis of the..

In order to meet the needs of the control loop, often require electromagnetic relay or transistor relay to accelerate or delay action, from action to constitute accelerate or delay circuit...

UGN-3501T Hall sensor due to the composition of the counter circuit diagram UGN-3501T has a high sensitivity, it can feel very small magnetic..

Circuit works: Figure shows a dedicated stepping motor controller L297 key pin, 17 feet (cw / ccw) is used to control the stepper motor rotation direction..

Assume the correct phase sequence to be VA-VB-VC. The circuit terminals are connected such that Tl gets connected to phase A and T2 to phase B. The capacitor advances the voltage developed across R2 due to phase "B" by — 60°, while the voltages developed....

This circuit monitors the power-line (ac) voltage. When a power failure occurs, on restoration of power, the circuit a..

The PWM controller uses complementary half-H peripheral drivers SN75603 and SN75604, with totem-pole outputs rated at 40 V and 2.0 A. These drivers effectively place the motor in a full-bridge configuration, which has the ability to provide bidirectional....

The controller circuit can reduce a fan"s noise, power consumption, and wear, particularly in the presence of a low, fluctuating ambient temperature. Mount a temperature sensor in the fan"s airstream, and the circuit will adjust the fan speed as necessary....

In this proximity detector an NE567 tone decoder provides a signal of about 100 kHz that is fed to one sensor. The senso..

The TL3103 linear Hall-effect device can be used as a compass. By definition, the north pole of a magnet is the pole that is attracted by the magnetic north pole of the earth. The north pole of a magnet repels the north-seeking pole of a compass. By....

In machine and equipment design. some applications require measurement of both the shaft speed and the direction of rotation. Fig. 56-4 shows the circuit of a tachometer, which also indicates the direction of rotation. The flywheel has two magnets embedded....

Dc power can also be controlled via fiberoptics. The circuit provides an insulated speed control path for a small dc actuator motor (< Vn hp). Control logic is a self-contained module requiring about 300 mW at 12 V, which can be battery powered. The control....

The resistor capacitor network R1-R2-C1 provides a ramp-type reference voltage superimposed on top of a dc voltage adjustable with the speed-setting potentiometer R2. This reference voltage appearing at the wiper of R2 is balanced against the residual....

The device generates an adjustable frequency of low to medium powered IR pulses of invisible energy and must be treated with care. The portable battery pack is stepped up to 200 to 300 volts by the inverter circuit consisting of Ql, Q2, and Tl. Ql conducts....

The modified power-factor controller, developed at the Marshall Space Flight Center, employs a phase detector for each of the three phase windings of a delta-connected induction motor. The phase-difference sum is the basis for control. ..

This simple stereo amplifier uses a National LM3871C. The pin numbers in parentheses are for one channel, and those not in parentheses are for the other channel. The supply voltage can be +9 to +30 Vdc at about 10 mA. The output voltage swing is about....

The electromagnetic ring launcher is comprised of.four subcircuits: a clock circuit (built around U5, a 555 oscillator/timer configured for astable operation), a count-down/display circuit (built around U3), a 74190 synchronous up/down counter with BCD....

The relay which applies power to the wiper motor is actuated at periodic intervals by the timer circuit, closing the wiper motor contacts. Potentiometer R1 serves as the pulse rate control and potentiometer R5 as the pulse width control. ..

This circuit gives a 3 phase square-wave output for a variable speed motor drive. Operation is straightforward, the 4017 counter is synchronously reset after six clock inputs. The she outputs are combined to give the required waveforms. It is interesting to....

The control of both direction and of proportional motor speed is achieved by rotation of a single potentiometer. The motor driver is an SGS integrated circuit L293 which will drive up to 1 amp in either direction, depending on the logic state of input 1 and....

This circuit is intended as a revolution control for small dc motors as fitted, for instance, in small electric drills (..