[ Product Parameters ]： 1. Working Voltage: 5V 2. PCB Material: 1.6mm RF-4 Plate, 3. Installation: DIY soldering assembly, 4. Type: Logic ICs Operating, 5. Temperature: 0-45℃. 6. Size dimension:40*50mm
[ Product description ]: The calculator uses synchronous addition counter cd4518 to count. Cd4518 is a decimal addition counter, which contains two identical counters. Each unit has a clock input. S2 (CLR) is used to clear the end of the counter. The counting pulse is sent out by NE555. The timer adds one pulse every time it receives. The switch S1 is used to control 30s or 60s display.
[ Applicable Crowd ]: 1. Experienced in soldering, 2. Interested in soldering and assembly, 3. Strong hands-on ability, 4. Learners of circuit and electronic soldering, etc.
[ Notes ]: Component position and specification parameters are printed on our design board and can be made by first making screen parameters based on the board. Reasonable circuit layout design. Use your creativity, DIY Your most unique electronic product!
[ Warning ]: This product needs to be soldered by yourself. If you have no soldering experience, please read the welding instructions carefully and use soldering tools carefully in order to avoid safety problems.If you need instructions or have any questions about the product, please consult customer servic