Home Made Circuits and Schematics

To ring this automatic school indicate that the bell circuit should now be switched off manually. In case the peon has been late to start the school bell, the delay in minutes can be adjusted by advancing the time using switch S3. This circuit has two photo sensing devices which detect two levels of intensities. Light dependent resistors are used as photosensitive devices in this circuit. The light dependent resistor used with an op-amp as comparator detects the level of light Mechanical switches, wireless switches and much more helps us to activate device with ease and also provides safety. Today we are about to see the Circuit design and explanation of a ” Touch Switch Circuit ” which can be activated by a simple touch. Automatic switching equipment may consist of three circuit breakers with suitable control Such an arrangement, using multiple automatic transfer switches, is shown in Figure 3. Figure 3 – Diagram illustrating multiple automatic double-throw transfer the circuit turns switches On the light using a relay. When the door opens and closes for the second time, the circuit turns Off the light by turning off the relay. Read good post on Automatic Door Bell With Object Detection The element which is used to The requirements are: single mast wire beam light weight feeder impedance that will be in the range of the automatic tuners of the modern and for the control cable. Fig.4 The schematic diagram. SPST switches are used for direction change but also .

Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor. Simple touch switch circuit with 4011 – source The circuit as you can see from its diagram is This is the circuit diagram of a low cost emergency light based on white LED.The white LED provide very bright light which turns on when the mains supply is not there.The circuit has an automatic charger Light Activated Switch – A circuit application The heart of a smart meter is its switch-mode power supply Figure 1: Basic flyback block diagram For multioutput, the technique is to have multiple windings on the transformer followed by a diode and capacitor circuit, as shown in Figure 2. Specifically, the recent requirement for selective coordination imposes exceptional performance characteristics on automatic the transfer switch as described above. This diagram provides the basis for the coordination study of this circuit. .