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The MQ-7 sensor module can be easily interfaced with microcontrollers
2 ohm (1R20) Brand Resistor Chip size 1206 Tolerance 1% Power 1/4W Temperature Range -55°C to +125°C Mounting Type Surface mount No
Common Anode
Collector-Emitter Voltage (VCE) 50V Max
led and lcd TVs
12V-40V 10A DC PWM Motor Speed Controller PMBT3904 NPN The MQ-7 sensor module can400W DC PWM Motor Speed Controller allows you to regulate the speed of a DC motor with a Pulse Width Modulated (PWM) DC voltage and a Duty Cycle that may be adjusted from 10% to 100%. Your DC motor or other DC load can receive a continuous current of 0 10A at 12V 40V DC from the motor speed controller. Your DC motor or other DC load can receive an 8A continuous current from the motor speed controller. The circuit also incorporates a 10A fuse, as well