My Light Diagram

In the close fluid container where the fluid is injected into the container by means of a force pump, the pressure in the container could reach an unsafe level. The pressure operated control system is designed to limit the pressure in the container up to a safe level. Once the pressure exceeds the safe level the force pump should stop injecting the fluid in the container. One means of the force pump pressure up to the safe level is by means of pressure switch PS installed in the container. see figure (A). (A) Close container using the POCS. An example is used in a jetmatic pump. For an open fluid container, a level pressure switch LPS shown in figure (B) is installed at the lower part of the open fluid container. The LPS with associated control circuit will limit the height of the fluid being pump into the open container at a pre-determine level. (B) An open container using the POCS. Other application of POCS using the pressure switches PS and LPS are found in air compressor and high p...

This solid state DC switch can be assembled using just three transistors and some passive components. It can be used to switch on one gadget while switching off the second gadget with momentary operation of switch. To reverse the operation, you just have to momentarily depress another switch.  The circuit operates over 6V-15V DC supply voltage. It uses positive feedback from transistor T2 to transistor T1 to keep this transistor pair in latched state (on/ off), while the state of the third transistor stage is the complement of transistor T2’s conduction state.  Initially when switch S3 is closed, both transistors T1 and T2 are off, as no forward bias is available to these, while the base of transistor T3 is effectively grounded via resistors R8 and R6 (shunted by the load of the first gadget). As a result, transistor T3 is forward biased and gadget 2 gets the supply. This is indicated by glowing of LED2.  Solid-State Switch For Dc-Operated Gadgets Circuit diagram : Soli...

This is the Simple 12 Vdc Battery Operated 120 Vac Power source Circuit Diagram. This simple 1 20 V: 24 V, center-tapped control transformer and four additional components can do the job. This circuit outputs a clean 200 V pk-pk square wave at 60 Hz and can supply up to 20 W. The circuit is self-starting and free-running. If Q1 is faster and has a higher gain than Q2, it will tum on first when you apply the input power and will hold Q2 off. Simple 12 Vdc Battery Operated 120 Vac Power source Circuit Diagram Load current and transformer magnetizing current then flows in the upper half of the primary winding, and auto transformer action supplies the base drive until the transformer saturates. When that action occurs, Q1 loses its base drive. As it turns off, the transformer voltages reverse, turning Q2 on and repeating the cycle. The output frequency depends on the transformer iron and input voltage, but not on the load. The frequency will generally range between 50 to 60 Hz wit...

This design controls up to 8 devices using a PIC microcontroller (PIC16F84A) connected to the phone line. The unique feature here is that unlike other telephone line based remote control, this device does not need the call to be answered at the remote end so the call will not be charged. This device depends on number of rings given on the telephone line to activate/deactivate devices. Set the DIP SWITCH as follows: Switch RA4     Switch RA3        No. of initial rings to Switch ON(activate half of the board) OFF        OFF             2 ON         OFF             4 OFF        ON              3 ON         ON              5 T...