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|This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a security system.|
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|im trying to make a 6 volt rain sensor that will move a 6 volt motor back and forth|
|Can v extend this circuit for automatic wiper.if so plz send me the extended circuit|
|change the scr with a bjt NPN transistor|
|Why doesn't OFF when it drys?. Very simple: change The DC supply for an AC supply; the SCR turns OFF during the power supply's negative cycle . Additionally, you can change the SCR for a TRIAC.|
|If it detects rain, and when it drys it still thinks there's rain probably you could put 1N4148 instead of 1N4001 because 1N4148 is a fast recovery diode... maybe...|
|hey. Is this parts also available in south africa? Lol.. sorry but I would like to know|
|SIR, can you explain the function of each part of the circuit, especially the diode and the resistor.|
|to stop the buzzer you have to replace the SCR with a BJT in darlington pair arrangement... and also use 10k resistance as R1 connected with gate.. and the collector of transistor with the buzzer's leg. and emitter =>ground.........BJT 547 will be sufficient for that.|
|i have maid one, its perfect! i just follow the schematic and it works.|
|Is it really not switching off when the sensor is dry?|
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