Remote operated musical bell can be made combining the following circuits.
a) Remote tester
b) Basic RC circuit
c) Simple Musical bell
When a remote is pressed, the circuit plays a music.
a) Remote tester
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All of us know that NE555(or other versions) is a versatile IC for building big and small projects. Recently, I
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When you press an infrared transmitter or normal TV remote control near TSOP1738 infrared sensor, the 555 timer configured in monostable mode gets triggered.
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This circuit has been configured in Astable mode. The output pulses are determined by the values of resistors R1, R2 and the timing capacitor C1. The formula for the frequency of pulses is: f= 1.44/[(R1+2R2)*C1].
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One of the main objectives of LDR Engineering projects is to make students capable of developing their own logic for making devices. Here is an example that tells how LDR Engineering helps in developing ideas.
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This 555 timer circuit below toggles the LED when a button is pressed. Pins 2 and 6, the threshold and trigger inputs, are held at 1/2 the supply voltage by the two 10K resistors.
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Clap switch
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CONTACTLESS AUTOMATIC WARDROBE LED LIGHT WITH FADE EFFECT
LUX METER MODULE
SOUND ACTIVATED SWITCH – RELAY
PIR SENSOR
AUDIO VU METER 9 LEDS
IR REMOTE VOLUME CONTROLLER
4 CHANNEL INFRARED REMOTE RELAYS
TOGGLE ON / OFF SWITCH
8 CHANNEL RELAY BOARD
ELECTRONIC TOGGLE SWITCH
ONE CHANNEL RELAY DRIVER
DC MOTOR DIRECTION CONTROLLER WITH TACT SWITCHES
DC SERVO MOTOR DRIVER
UNIPOLAR 4-PHASE STEPPER MOTOR CONTROLLER
RC SERVO DRIVER 0-5V
L293D DC MOTOR DRIVER MODULE
DC MOTOR SPEED AND DIRECTION CONTROLLER USING L293D
HALF BRIDGE DRIVER BASED ON IR2104
AC MOTOR SPEED CONTROLLER USING U2008B
