This frequency generator module includes a 78L05 voltage regulator for stable operation. It is designed to run from 8-9 V input with an input current of about 200 mA; the ideal input voltage is 8-9 V. Power and connections - 78L05 voltage regulator provides stable power for the board. - Connect 5p/6p as shown in the photo; the encoder 7p in the middle connects to the digital matrix input. - 14P (8V GND) is the 8V power supply from the motherboard. Frequency control - Supports continuous adjustment from 0 to 55 MHz in 1 Hz increments. Power caution - An input voltage of 12 V should only be used for short-term testing; otherwise the board may overheat. Applications and use scenarios - RF circuit testing and oscillator characterization where precise, fine-grained frequency control is required. - Educational lab setups to demonstrate frequency adjustment and digital matrix input connections. - Prototyping and debugging of timing-critical circuits that need an adjustable 0-55 MHz source.