Taidacent Basketball Game 24 Seconds Digital Countdown Timer Circuit Electronic Parts Kit DIY Electronic Trainer Kit
The circuit consists of 5 parts: second pulse generator, counter, decoder, display circuit and alarm circuit. The counter decrements from 24 to 0 in seconds, and finally pauses from 0 to 24. When the start button is pressed, it enters the next countdown count.
Power supply voltage
DC 3-5V, remember that the voltage cannot be greater than 5V, otherwise the digital tube will be burned out, 4.5V is recommended
Start: Start the button, after the countdown is over, press this button to start the counter
Begin counting down.
Reset: When this key is pressed, no matter what working state it is working in, the counter will immediately reset to the preset value of 24 seconds.
Pause: When this button is kept pressed, the counter pauses counting. After the button is released, the timing continues.
Reminder: If the buzzer is quiet or does not sound, you can directly use the cut pins to short-circuit and solder R7. The display may be messy after power-on, just press the reset button.
Pay attention to the positive and negative poles of the power supply, the resistance value should correspond to the one on the board, the chip model is inserted in the corresponding position, and the chip notch direction is all upwards. Both LEDs and electrolytic capacitors have long pins that are positive.
Packing & Delivery
1. who are we? We are based in Guangdong, China, start from 2013,sell to North America(20.00%),Western Europe(18.00%),Domestic Market(15.00%),Southern Europe(8.00%),Oceania(6.00%),South America(5.00%),Southeast Asia(5.00%),Northern Europe(5.00%),Eastern Europe(4.00%),Mid East(4.00%),South Asia(4.00%),Eastern Asia(3.00%),Central America(3.00%). There are total about 11-50 people in our office.
2. how can we guarantee quality? Always a pre-production sample before mass production; Always final Inspection before shipment;
3.what can you buy from us? power supply module,wireless module,rfid module,antenna,bluetooth module
4. why should you buy from us not from other suppliers? Taida was founded by several geeks who graduated from the top universities of China. In 2016, it moved to Guangzhou. Taida focuses on electronic communication product design, development. Its products exported to all over the world.
5. what services can we provide? Accepted Delivery Terms: FOB,CIF,EXW； Accepted Payment Currency:USD,EUR,JPY,CAD,AUD,HKD,GBP,CNY,CHF; Accepted Payment Type: T/T,L/C,MoneyGram,PayPal,Western Union,Cash,Escrow; Language Spoken:English,Chinese,Spanish,Portuguese,German,French,Russian