Features:
1. The product is composed of high-quality electronic components, with stable product performance and long service life.
2. Supports Type-c power interface DC5V power supply or button battery power supply. The battery installation port has a hole on the side for easy removal of the battery.
3. This kit can not only perform mathematical calculations of addition, subtraction, multiplication and division, but also convert color ring resistor values. It is a multi-functional product suitable for electronics enthusiasts to practice welding and learn to use.
4. Customers can choose with or without a casing. After assembly, the product is lightweight and compact and can be used anytime and anywhere.
5. The digital tube display calculator production kit can not only realize mathematical calculations of addition, subtraction, multiplication and division, but also can convert the resistance value of the color ring resistor. Suitable for welding practice, electronic training, experiments and other purposes, very suitable for DIY enthusiasts.
Product parameters:
Product name: Digital tube display calculator kit
Working voltage: >2.8V
Type-c power supply voltage: DC5V
Button battery: 3V
Power supply mode: Type-c interface power supply or button battery power supply (Note: Type-c and button batteries cannot be powered at the same time, otherwise the button battery will be damaged)
Button battery model: CR2032
Digital tube display: six digits
Working current: 9mA
Sleep state: < 1mA
Shell size: 119*85*16mm

Product Features:
1. Composed of special circuit boards, digital tubes, microcontrollers, buttons and other components;
2. Perform addition, subtraction, multiplication, and division operations. It supports calculations with up to 6 digits. If the calculation result exceeds 6 digits, if it is a decimal, only the first 6 digits will be displayed. If it is an integer, scientific notation will be used. Indicates that the maximum number is 9.99×1011;
3. Color ring resistance conversion, supports 4-ring resistance and 5-ring resistance. The maximum calculation range is less than 4KM, and the accurate calculation range is less than 1M. According to the number of input colors, 4-ring resistance or 5-ring resistance is automatically identified;
4. Enter sleep mode by pressing the button to reduce power consumption;
5. Working/sleep mode switching:
(1). The default setting is working mode after power-on.
(2) Switch to the working mode and short press the C key in the sleep state. The digital tube lights up, which means it enters the working mode.
(3) Switch to sleep mode. Press and hold the C key for more than 1 second in the working mode. The digital tube goes out, which means it enters the sleep mode.

Shipping list:
DIY parts X1 (transparent shell optional)
Notice:
1. This product is a DIY kit, not a final product. It is shipped in parts and needs to be welded by yourself.
2. This welding project requires basic electronic knowledge and hands-on ability.