Description:
1. Digital tube display calculator production kit, which can realize mathematical calculations of addition, subtraction, multiplication and division
2. You can also convert color ring resistor values. Suitable for welding practice and electronic training
3. For experiments and other purposes, very suitable for DIY enthusiasts

Specifications:
Product name: HU-054A digital tube display calculator kit
Power supply mode: USB powered 5V or 3V button battery powered, (note the USB and button
The batteries cannot provide power at the same time, otherwise the button battery will be damaged)
Working voltage: >2.8V
Working current: working state: 12mA, sleep state: < 1mA
PCB size: 113x78mm, purely manual measurement, there is an error of 1~2mm

NOTE: This is a DIY kit, you need to solder.

If you need a shell you need to select (Type: Parts + shell)

>>>Manual: Click here to open<<<

Features:
1. Composed of special circuit board, digital tube, microcontroller, buttons and other components
2. Perform addition, subtraction, multiplication, and division operations, supporting up to 6-digit calculations, and the calculation results exceed
If the 6-digit number is a decimal, only the first 6 digits will be displayed. If it is an integer, the first 6 digits will be displayed.
Will be expressed using scientific notation, the maximum number is 9.99x1011
3. Color ring resistance conversion, supports 4-ring resistance and 5-ring resistance, and the maximum calculation range is small
Within 4KM, the accurate calculation range is less than 1M, and it will be automatically recognized based on the number of input colors.
4-ring resistor or 5-ring resistor
4. Enter sleep mode by pressing the button to reduce power consumption
5. 6-digit precision

Package Includes:
1x Parts Kit
1x Shell(Optional)

Component Name	Component Symbol	Quantity
In-line monolithic capacitor 105	C1	1
1220# Button Cell Holder	BT1	1
Tactile Switch	KEY1-KEYI7	17
Android charging port	P1	1
3-digit digital tube Common anode red	P4, P5	2
STC Microcontroller DIP28	U1	1
IC Socket28P	U1	1
CR2032 Button Battery 3V	Not includes	1
Button cap 10*10*5.6 Transparent cap 11.8*11.8*3.9		17
Shell	Optional	1
Screw package		1
Circuit Board		1
Key Stickers		1