DAOKAI 6-Bit Digital Clock Kit AT89C2051 Chip LED Digital Tube Display Electronic Clock DIY Soldering Practice Learning Kits with 9V Battery Clip

About this item

• •Parameters:
• •Working voltage: DC6-12V, recommended voltage: DC9V
• •Working current: about 35mA (requires external power supply)
• •PCB material specification: FR-4, 105x55mm, thickness 1.6mm, double-sided UV green oil
• •Digital tube: 0.4 inch, red light, common anode type
• •Parts gross weight: 45g
• •Instructions for use:
• •1. Function button description: The buttons are S1, S2, S3 from left to right, S1 is the function selection button, S2 is the function expansion button, and S3 is the value plus one button.
• •2. Operation instructions:
• •During operation, press S1 for a short time (less than 1 second) continuously to cycle through the above 6 functions. If you press and hold S1 for a long time (more than 2 seconds) in the middle, it will immediately return to the state of the clock function
• •Principle:
• •1. Display principle:
• •The main components of the display part are 3 two-digit common anode nixie tubes, driven by PNP type triodes, each port is equipped with a current limiting resistor, the driving mode is dynamic scanning, occupying P3.0~p3.5 ports, and the segment code is P1. 0~1.6 output. The colon part adopts four 3mm red light-emitting diodes, and the driving mode is the independent port P1.7 driving.
• •2. Keyboard principle:
• •The buttons S1~S3 are multiplexed with the P3.5, P3.4, and P3.2 ports of the display part.
• •Its working mode is that when the corresponding port outputs a high level, the state of the key is read and the jitter is eliminated by the single-chip microcomputer and the corresponding key value is given.
• •Package includes:
• •1 x 6 Bits Digital Electronic Clock DIY Kits
• •1 x 9V Battery Holder
• •1 x 9V Battery Clip

Specifications