A three-alarm phase circuits
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...
Electronic Watchdog
As shown for the electronic watchdog circuit. It has the ability of ordinary dog guard the house. Whenever someone enters the door 10 meters monitored area, it...
555 electrical equipment overload and a phase circuit protection device
As shown for the electrical equipment overload and phase failure protection circuitry. The device consists of + 12V, + 5V DC power supply, AC transformer, volt...
Off TV with reed elimination circuit diagram highlights
As shown by a reed switch off the TV highlights cancellation circuit. Brightness potentiometer W ground a series reed, normally watch TV, the reed contact is c...
Leakage protection switch circuit diagram
As shown Multifunction leakage protection switch utilizing Nissan ASIC M54122L, it can be composed of multi-function leakage protection switch, when the leakage...
Simple and practical electric vehicle anti-theft alarm circuit diagram
As environmental awareness increases, the electric car has been poured into our family, become an indispensable part of peoples transport. How to prevent the el...
Pots water alarm circuit
Are the flowers in pots need watering if the soil surface moist observation alone is sometimes unreliable. For this reason, the production of dry flower instruc...
Anti-theft car audio system circuit diagram
Anti-theft car audio system circuit is shown, which is taken from the car battery 12V DC power supply. When after closing the switch S1. Optocoupler IC1 light e...
Alarm interface circuit
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...
Thyristor overcurrent protection circuit 2
Adjusting Ro or RP, you can change over the current setpoint. Circuit shown in Figure 14-98. Overcurrent, V conduction thyristor, transistor VTi, VT2 off immedi...
Simple circuit diagram repellent
A very cheap and simple repellents can be used for rats, mice and other animals may use electronic figure below. Circuit using CMOS integrated circuit type 4047...
A simple phone automatic recording circuit
A simple phone automatically shows the recording circuit. In this circuit, after the call Ming sound start switch K is turned on by the sound of automatic messa...
Burglar alarm circuit
A simple burglar alarm circuits, sensors pyroelectric sensor IRA-E100SZI. When human movement is detected, the pressure on the electric buzzer alarm whistle. Se...
Electronics - circuit relay type answer
A relay-style five electronic Responder Responder group circuit. The circuit has a self-locking, sound and light display, monitor time and other functions. Larg...
The second phase alarm circuit
A capacitor Cl and resistor Ri-R3 consisting negative sequence voltage filtration device. Resistors and capacitors to meet the following requirements: Ri Ra-Rz ...
Phase solid state relay fault protection circuit b
38. The solid state phase failure relays for three-phase AC phase failure monitoring, protection and control of new devices, referred SSPORR. It is only a five ...
Phase solid state relay fault protection circuit b
38. The solid state phase failure relays for three-phase AC phase failure monitoring, protection and control of new devices, referred SSPORR. It is only a five ...
One circuit alarm phase
3-phase power, would endanger the electrical equipment (especially asynchronous motor) security, in order to detect phase failure, it can be made with a broken ...
One circuit alarm phase
3-phase power, would endanger the electrical equipment (especially asynchronous motor) security, in order to detect phase failure, it can be made with a broken ...
Elderly lost alarm circuit
11A by the component and other components RMIB multivibrator, when the old man lost not more than a certain distance, the receiver output pin output low, the ti...