SMD SMT Welding Practice Soldering Skill Training Board 8-Channel Digital Responder DIY Components Practice Board DIY Learning Training Kit

Description:  The full-ply eight-channel digital responder is a new product specially developed for electronic assembly and debugging skills. The circuit design uses a wide range of time-base circuits and decoding drivers for digital circuits. The circuit components are all based on the current chip package series. , is a SMT welding training kit worth learning and circuit analysis. Features: The circuit includes rush, encode, priority, latch, digital display and reset circuits. Eight-way priority answering can be performed at the same time.  After the button is pressed, the buzzer sounds, and (light-emitting diode) displays the number of the priority responder. After the answer is successful, press the button again, the display will not change unless the reset button is pressed. After reset, the display is cleared to continue to answer. S1-S8 is the answer button and S9 is the reset button. CD4511 is an integrated circuit with BCD-7 segment latch/decode/drive circuit. Among them, 1, 2, 6, and 7 are BCD code input terminals, 9 to 15 pins are display output terminals, and 3 pins (LT). To test the output, when "LT" is 0, the output is all 1, 4 (BI) is the blanking end, when BI is 0, the output is all 0, 5 (LE) is the latching enable, when LE When "0" is changed to "1", the output maintains the display state when LE is 0. 16 feet are the power supply, and 8 feet are the power supply negative. The 555 and peripheral circuits form a stimulator circuit. Digital display is a combination of light-emitting diodes Notes: 1>.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. 2>.Please allow slight dimension difference due to different manual measurement.