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To connect with other slave devices a master module would be necessary such as the HC-05 version which can do both master and slave
Gain Adjustment Potentiometer
Low-power dual-core 32-bit CPU for application processors
74HC74N (Dual D-type flip-flop with set and reset-positive edge-trigger)
Low Power Consumption: 80-μA
MAX7219 Dot Matrix Module Liquid Pump - To connect with other slaveIntroduction : MAX7219 Dot Matrix Module. A single module can drive an 8 x 8 common cathode lattice Operating voltage: 5V Size: 5 x 3. 2 x 1. 5 cm (L x W x H) LED color: red With four screws hole, aperture 3mm With input and output interfaces, supports multiple modules cascade Connections : The module left side as an input port and the output port on the right To control a single module, just connect the input port to the CPU When cascading multiple
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