Infrared hood switch controller circuit

Published:2014/3/3 20:20:00 Author:lynne | Keyword: Infrared hood switch controller circuit, | From:SeekIC

Spend more and more kitchen range hood, it is the kitchen clean and a good helper. We have to press when using the power switch to turn on or off, when we hand full of greasy Would you expect this remarkable line trouble, always made ​​the switch greasy. This circuit is the use of infrared light to control the switch as long as the palm of your hand too close to the switch stays on the line, like infrared faucets, very convenient and practical. Because it is close to using infrared, low power durable, energy-saving. The circuit is mainly transmitted by infrared, receive, bistable switch and power circuit, as shown . R3, D3, C3 H to the receiving circuit to provide a stable 5V DC voltage. H quiescent current of 1 ~ 2mA. N4, N5 oscillation signal 32KHz , as amended by Q zoom out by the infrared emission tube D7. H receives the signal , high output, amplified by the C4 is coupled to N1 , N1 reverse output low, the flip -flop circuit , N3 high output, triac , exhaust fan work . If the received infrared signal H again , N2, N3 again flipped off SCR, hoods stopped . C5 N1 from interference and stable input level role , R4 is a pull-down resistor .Commissioning of high quality circuit board assembly , according to map production to succeed. Circuit board mounted on the wall switch in the original box . In the switch box cover drill two holes, hole distance of 2 cm, mounted at one end of the D7 sealed cylindrical hollow tube ( available toothpaste cap ), the translucent spout toward the hole, put another hole at the reception circuit H. After making a good integrated infrared transmitter and receiver tubes placed parallel to H ( H bald face and bald face parallel D7 ), internal definitely not light. Adjust the hand away from the D7 W about 15 to 20 cm can flip the circuit .



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Control_Circuit/Infrared_hood_switch_controller_circuit.html

Print this Page | Comments | Reading(3)