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The 5V 1-channel relay module works with a 5V to 12V TTL control signal
which makes it suitable for a wide range of lighting applications
Open loop control means no feedback information about the position is needed
Pinout of CD4012 IC
XL6019 DC-DC 5A Adjustable Boost Power Supply Module (RED) DHT22 The 5V 1-channel relay moduleXL6019 DC DC 5A Adjustable Boost Power Supply Module(RED) DC to DC step up module based on the upgraded XL Semi XL 6019, offering up to 5A switching current and conversion efficiency of up to 97%. This XL6019 boost converter has two input pins for VCC and GND on the left side of the module. It has two output pins on the right side of the module. To get the desired output voltage you have to rotate the trimpot screw. It changes the feedback resistance