Introduction of Digital / Digital Display Ammeter Voltmeter Chip-SD8100

This chip is a CMOS single chip with 24-bit ADC. The unique AC measurement function does not require AC / DC conversion of the signal. You can directly connect the AC signal to the ADC channel of the chip for measurement. The chip has abundant resources: the RTC module can calculate the year, month, day, hour, minute, and second, and can automatically calculate the leap year. The time accuracy can be adjusted by software modification of the register. The 32.768KHZ crystal can use the internal integrated capacitor; the UART module can It is convenient for users to communicate with computers and other equipment; a variety of optional output power supplies can provide stable voltages for external devices; there are external crystal oscillators and internal RC oscillation clocks; ADC can choose up to 6 channels, and the output frequency can be selected to meet Multi-channel use needs, you can also make a reasonable choice between speed and accuracy; 16K byte OTP, can be used as EERPOM; frequency can be set BUZ output; programmable pulse output TIMER module, etc., can make the chip It greatly simplifies peripheral devices in various metering applications.

Performance characteristics

â—† High-precision ADC, 24-bit output, 20-bit effective number of bits, up to 3 differential channels or 6 single-ended channels;

â—† Low noise and high input impedance preamplifier, 1 / 12.5 / 50/100/200 gain is optional; select 200 times gain, the equivalent input noise is less than 40nVrms when ADC 8SPS output rate;

â—† 8-bit RISC ultra-low-power MCU, the typical value is 200uA at 2MHZ working clock and 3V operating voltage; SLEEP current at low frequency 32K is 1.5uA, HALT current is less than 0.2uA

â—† Can directly measure the AC signal, AC effective value noise free accuracy 16bits;

â—† Strong anti-interference ability, EFT test is greater than 4KV;

â—† Integrated multiple clock oscillators, flexible and diverse clock selection, when external crystal oscillator is selected, support vibration stop detection function, when the external crystal oscillator stops vibration, it will automatically wake up the internal 2M RC oscillation and switch to internal clock work;

â—† The range of ADC output rate can be selected: 8HZ-2KHZ;

â—† 12SEG * 4COM liquid crystal drive circuit, ultra-low power consumption and large driving capacity design; contains a programmable boost module, which can maintain highlight display under low voltage conditions and supports grayscale adjustment;

â—† There is a silicon temperature sensor inside, which can be calibrated at a single point;

â—† Output 1.18V low temperature drift benchmark;

â—† Output four kinds of optional stable power supply 2.4V / 2.6V / 2.9V / 3.3V, provide excitation signal for external sensor;

â—† Flexible battery detection function, detection range 2.0-3.3V;

â—† ADC external reference and internal reference are optional, and multiple internal reference options are integrated;

â—† RTC module, can calculate year, month, day, hour, minute, second, can automatically calculate leap year, time precision can be adjusted;

â—† Rich peripheral resources: UART, I2C, PDM, PFD, CAPTURE, TIMER;

â—† Power-down detection circuit and power-on reset circuit;

â—† Working voltage range 2.4V-3.6V;

â—† Working temperature range: -40 â„ƒ to 85 â„ƒ;

Essential Laundry Brush

The laundry brush is one of the indispensable cleaning tools in our daily life, which can help us better clean clothes and remove stubborn stains. Here are some essential categories of laundry brush products:
1. Manual laundry brush: This is the most common type of laundry brush, usually made of plastic or wood, and the brush head is composed of hard or soft nylon bristles. The manual laundry brush is compact and lightweight, easy to operate, and suitable for cleaning various clothes.
2. Electric washing brush: Electric washing brush is a modern cleaning tool that can rotate automatically through electric drive, greatly reducing people's labor intensity. Electric laundry brushes are usually equipped with multiple brush heads, suitable for various cleaning needs.
3. Shoe brush: Shoe brush is a brush specifically used to clean shoes, usually divided into two types: hard bristle and soft bristle. Hard bristled shoe brushes are suitable for cleaning leather shoes, while soft bristled shoe brushes are suitable for cleaning cloth shoes and sports shoes.
4. Collar brush: Collar brush is a type of brush specifically used to clean collars and cuffs. The brush head is usually small and suitable for cleaning these small areas.
5. Laundry board: Laundry board is a traditional laundry tool, usually made of plastic or wood, with a raised texture on the surface, which can help clean clothes.
6. Laundry ball: Laundry ball is a modern washing tool that can be used in washing machines. It can produce a large amount of foam to help clean clothes, while also reducing clothing wear.
The above is the classification of some common laundry brush products. Choosing the appropriate laundry brush according to your own needs can make laundry easier and more efficient.

Essential Laundry Brush,Laundry Brush,Multipurpose Shoe Brush,Pressing Shoe Brushes

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