Wiring Schematic diagram: relay

Tuesday, November 18, 2014

Switch With Relay Schematic

Light Switch With Relay is a series of electronic switches that are controlled by a series of light received. Light Switch With Relay circuit can be used to control lighting automatically, so the lights can automatically turn on when the room light or the region began to decrease. Limit of light used to activate the electronic switch in the circuit Light Relay Switch With This can be set via the potentiometer P1. P1 setting is basically a light reception sensitivity settings. Light Switch With Relay circuit uses the LDR as the light sensor and an IC 741 as a comparator and reference voltage sensor, relay driver transistor Q1 as as an electronic switch. A complete range of Light Switch With Relay is as follows.

Circuit Light Relay Switch With diats a light switch that will be active when the sensor does not receive light, if you want to turn the tables (the active switch when the sensor receives light) it can be done by reversing the position between the LDR and R1. Diodan D1 serves to avoid the effects of EMF or sparking of the relay coil. The circuit is simple and easy to make, I hope to provide ideas and descriptions in the manufacture of a controlled light switch. Hopefully useful.

Latching Relay On Off Switch Circuit

The ambit beneath switches AC or DC ability to a amount application an ultra low ability 3v latching broadcast with two coils. The broadcast can handle about 10 amps of current, up to 250vac. Anniversary time the baby pushbutton is pressed, the ambit either latches the broadcast contacts bankrupt or alleviate them open. The 3v powered ambit uses a distinct 74HC14. This accessory contains six Schmitt activate inverters in the one 14 pin package. Two inverters anatomy a flip/flop circuit.

Anniversary time the pushbutton is pressed, the ambit changes accompaniment and stays in that accompaniment until the button is apprenticed again. With anniversary accompaniment change, a 25ms latching or unlatching beating is produced and is baffled to the actual broadcast coil. The braid attrition is about 45 ohms so about 70ma of accepted is fatigued from the 3v array for anniversary broadcast pulse. The boilerplate ability is so low that the ambit can accomplish for abounding years on one set of batteries. I would advance application two AA or AAA acrid cells.

Water Pump Relay Controller Circuit Schematic

Water reservoir automatic level control, Simple schemary - 12V supply By means of a Relay, employed to drive a water pump, this schema provides automatic level control of a water reservoir or well. The shorter steel rod is the "water high" sensor, whereas the longer is the "water low" sensor. When the water level is below both sensors, IC1C output (pin #10) is low; if the water becomes in contact with the longer sensor the output remains low until the shorter sensor is reached. At this point IC1C output goes high, Q1 conducts, the Relay is energized and the pump starts operating.

Now, the water level begins to decrease and the shorter sensor will be no longer in contact with the water, but IC1C output will be hold high by the signal return to pin #5 of IC1B, so the pump will continue its operation. But when the water level falls below the longer sensor, IC1C output goes low and the pump will stop. SW1 is optional and was added to provide reverse operation. Switching SW1 in order to connect R3 to pin #11 of IC1D, the pump will operate when the reservoir is nearly empty and will stop when the reservoir is full. In this case, the pump will be used to fill the reservoir and not to empty it as in the default operating mode.

Water Pump Relay Controller Circuit diagram:

Water Pump Relay Control Circuit Diagram

Parts:
R1 = 15K - 1/4W Resistors
R2 = 15K - 1/4W Resistors
R3 = 10K - 1/4W Resistor
R4 = 1K - 1/4W Resistor
D1 = LED - any type and color
D2 = 1N4148 - 75V 150mA Diode
Q1 = BC337 - 45V 800mA NPN Transistor
IC1 = 4001 Quad 2 Input NOR Gate CMos IC
SW = SPDT Toggle or Slide Switch (Optional)
RL1 = Relay with SPDT 2A @ 230V switch
Coil Voltage 12V - Coil resistance 200-300 Ohm
Two steel rods of appropriate length

Notes:

The two steel rods must be supported by a small insulated (wooden or plastic) board.
The schema can be used also with non-metal tanks, provided a third steel rod having about the same height of the tank will be added and connected to the diagram negative ground.

Wiring Schematic diagram

Tuesday, November 18, 2014

Switch With Relay Schematic

Monday, November 17, 2014

Water to activated Relay circuit

Tuesday, October 14, 2014

Latching Relay On Off Switch Circuit

Sunday, August 17, 2014

Water Pump Relay Controller Circuit Schematic