This is a simple 4-in-1 do-it-yourself (DIY) kit from BuildCircuit. The kit has four different circuits that can be switched
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How does an FM transmitter DIY Kit work
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
Clap switch
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Water Level Indicator
Object counter using LDR and calculator
How to make a digital object counter using, infrared sensor, CD4026 and seven segment display
Toggle switch using 555
