Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Motor Control Circuits
Motor Control Circuits
DC motor reverse brake circuit
DC motor reverse brake circuit is shown. Braking, press the stop button SB2, disconnect move off contact so KM1 loss of power release, then turned on the brake contactor KM2 ci
DC motor dynamic braking circuit
DC motor is shown in dynamic braking circuit. Braking, press the stop button SB2, the contactor KM1 missing, and released its movable contact connected off, electrical voltage
Two models of DC motor reversing control circuit
DC motor E inversion control circuit, the circuit loop L li KDL -. 80 (primer using a single set of normally open/normally record relay contacts when A.B two low, the relay KI,
A small DC motor control circuit a
Core multi-resonant circuit 40 L06 collapse is 1C.. Auxiliary electric f below its low threshold, open Icl. Output (2 feet) for the business l NIE., CI by D1 and Ri fast chargi
Current three-phase motor phase protection circuit diagram
Current three-phase motor phase protection circuit, as shown in FIG. 3 homemade small current transformers Tl, T2 and T3 on the motor is running three-phase current detection s
DC brush motor driver circuit diagram
DC brush motor driver circuit diagram MC33035 chip using a straight debate brush motor driving circuit ring shows a typical DC brush motor driver circuit diagram. 4 field effec
Delta connection Motor phase protection circuit
Delta connection Motor phase failure protection circuit as shown in FIG. Its protective role is as follows: The three resistors R, ~ R3 connected as an artificial neutral point
Construction and operation of the brushless motor windings principle e
Construction and operation of the brushless motor windings principle e Structure and working principle of the triangular coils As shown, through the switch, you can make the st
Two-speed motor stator winding 2Y-Y connection
Fig. 3-100 is a two-speed motor stator windings lead wiring diagram 2Y/Y-connected.
Fan motor driving circuit
Fan motor driving circuit Shown as a simple fan motor driving circuit, which is mainly from the power circuit, the motor drive circuit portion constituted. The power supply cir
Fan motor starting circuit diagram
Fan power equipment traditional control methods is through manual or relay control, there is the problem of poor reliability and flexibility. For example, the motor capacity at
Motor Speed and Speed protection circuit of small hydropower stations
FIG, M is a variable speed motor control wicket opening and closing and opening. O electric governor. Front grid, hit the power switch SA A side, toggle switch S is opened; aft
The beginning and end of a three-phase motor winding speed judgment circuit
FIG aa, bb, and ce three-phase windings, respectively. Double throw switch Kl-l ~ Kl-4 hit the left side, that switch l and 2 phase, at this time, aa and bb in series with the
A DC motor reverse brake circuit
FIG circuit 3-200 (a) in Fig. When the reverse brake, forward contacts open contacts KMi, reverse brake contactor KM3 contact is disconnected, reverse contactor KM2 contacts ar
A brushless DC motor road
F to turn a water magnet, the stator coil into 4 groups. 4 stars all set of coils through mediums P pulse signals by the rotor control number, so as to form a rotating magnetic
Dual motor drive circuit
Dual motor drive circuit Automatic tracking shows are constituted by two motors (white line) Cars structure, principle and double motor drive circuit.
Motor winding circuit diagram of the current imbalance dried
Drying the motor winding circuit current imbalance Below is a circuit diagram of the motor winding current imbalance drying:
Electronic circuit steady speed motor application
Electronic circuit steady speed motor applications Electronic steady speed mode is automatic remote control over the role of the motor power supply circuit to the motor to achi
A variable speed fan motor thyristor circuit
Electrical flow through the saddle j pounds. TV added in a controlled manner Qian Mountain amphipod species lI- ii ~ mi pulsating chord electric Ir:., This electric IE again. a
A DC motor PWM speed control circuit
Dong Fang Zhuo most governors are pulse width modulation, pulse position modulation DA foot of the circuit (the clock when called righteous side of the system). Manifold 555 ov
Electric valve motor control circuit
Electric valve control circuit consists of the following three parts: main lines, control lines, and power consumption brake line aa. The main circuit includes a power switch v
Electric shaver motor drive circuit
Electric shaver motor drive circuit It shows a typical motor drive circuit of an electric shaver. AC 220V to charge the battery through the charging circuit, but also for the m
2 -Y- connection automatic three-speed motor acceleration control circuit
Figure 3-118 automatic acceleration control circuit. It uses the male contactor time relay, the motor starts automatically from a low speed by the speed the transition to high-
Reversing motor drive dc control
This is a positioning servo drive featuring adjustment of balance, gain, and deadband. In addition to control from a dc signal, mechanical input can be fed into the balance control, or that control could be replaced by a pair of resistance transducers for control by light or by temperature.
Dc servo bipolar control
This circuit accepts bipolar control inputs of Â± 5 V and provides a phase-chopped output to a dc load (such as a servo motor) of the same polarity as the input. The rms voltage of the output is closely proportional to the control input voltage. N-channel and p-channel TMOS devices', Ql and Q2, are connected in anti-series to form a...
12-24V Impulse control dimmer
This circuit is intended for use with motors, lamps,heatings etc. Continuously from nearly zero up to maximum capacity (5-95%). Almost lossfree control by means of this impulse control. Nearly total turning moment of motors. The transistior T3 must absolutely be fastened on a heatsink with minimum dimentions of approximate 100x100x5mm. The...
Single chip pump controller
This circuit controls the level of a tank using a bang-bang controlled electrical pump. The actual level of liquid is measured by a capacitive level-meter. The first inverter performs as a capacitance to frequency converter. It is a Schmitt oscillator and its frequency output decreases as the capacitance increases. The second inverter is a...
Speed regulator for dc motors
A four thyristor controlled bridge is used for operation in two quadrants of the torque-speed characteristics. In the trigger circuits the usual pulse transformers were replaced by self biased circuits which minimize gate power consumption and increase noise immunity. Electrical isolation is guaranteed by the use of optocouplers. The trigger...
Three-phase ac motor driver 2
By varying either Rl or R2, the oscillator frequency can be adjusted over a narrow range. The R3/R4 ratio sets the second amplifier's gain to compensate for signal attenuation occurring in the phase shifters. The circuits can be driven from an external source, such as a pulse or square wave, setting the gain of the left-hand amplifier to a level...
Tachometer feedback control
The system utilizes the H21A1 and a chopper disc to provide superior speed regulation when the dynamic characteristics of the motor system and the feedback system are matched to provide stability. The tachometer feedback system illustrated was designed around specific motor/load combinations and may require modification to prevent hunting or...
High-torque motor speed control
A bridge circuit consisting of two SCRs and two silicon rectifiers furnishes full-wave power to the motor. Diodes, D3 and D5, supply dc to the trigger circuit through dropping resistors, Rl. Phase delay of SCR firing is obtained by charging C2 through resistors R3 and R4 from the voltage level established by the zener diode, D8. When C2 charges...
AC motor brake
A shot of direct current will instantly stop any ac power tool motor. Switch Si is a center-off, one side spring return. With Si on, ac will be fed to the motor and the motor will run. To brake the motor, simply press Si down and a quick shot of dc will instantly stop it. The switch returns to the center off position when released
Stepper Motor Circuits
Remote Control Circuits
Direction Finder Circuits
Power Control Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity