Feature:
Item name:CD4511 Eight-way Digital Grabber Soldering Kit

Board size: 89*65mm

Power supply: DC 5V

Product descriotion:

The circuit can be used for eight priority quizzes at the same time. After the key is pressed, the buzzer sounds and the number of priority answerers is displayed at the same time (digital tube); after a successful answer, the display will not change unless the key is reset. SB1 ~ SB8 for the answer key; SB9 for the reset key; CD4511 is a piece of integrated circuit containing BCD-7 segment latching / decoding / driving circuit, of which 1, 2, 6, 7 for the BCD code input, 9 ~ 15 feet for the display output, 3 feet (LT) for the test output, when the "LT" When "LT" is 0, the output is all 1, pin 4 (BI) is the fading terminal, when BI is 0, the output is all 0, pin 5 (LE) is the latching allow terminal, when LE changes from "0" to "1", the output maintains the display state when LE is 0. 16 pin is the positive power supply, pin 8 is the negative power supply. 555 and peripheral circuits form the snatcher sound circuit. The entire circuit can be powered by 7.5V to 9V DC.

Note: It's diy kits. Need to solder by yourself.

The battery is not included.

Due to the light and screen setting difference, the item's color may be slightly different from the pictures.

Please allow slight dimension difference due to different manual measurement.