The most important factors when purchasing home appliances include the appearance of the product and the high-end features it supports. With today's highly integrated system-on-a-chip (SoC) processors, designers can not only introduce a new user interface based on capacitive sensing technology, but also integrate other system functions to reduce system cost and save board space. At the same time, because many of the components required to build a system are now integrated into a unified chip, SoC can significantly accelerate time-to-market. In addition, the time required to connect multiple devices and troubleshoot can be significantly reduced.
Figure 1 shows a block diagram of an induction cooker. This appliance must provide the following key features:
Maintaining the temperature of the pan: Pulse width modulation (PWM) is required to set the ignition duration of the heating coil;
Fan control: temperature sensor and PWM are required to drive the fan motor;
Overcurrent and overvoltage protection: ADC and comparator are required;
Automatic detection of pan: requires inductance sensing function;
Time-based cooking: a real-time clock (RTC) is required;
User Interface - Display: Requires LED driver or LCD glass display;
User Interface - Buttons: Capacitive touch sensing and detection are required.
Figure 1: Induction Cooker Block Diagram
Capacitive sensing technology
Keys based on capacitive sensing technology make the shape of the appliance stylish and beautiful, eliminating wear and tear, and are more popular than mechanical buttons. Many appliances must be used in close proximity to liquids, so consider waterproofing to avoid water splashes and false button triggering. Figure 2 shows a typical layout of a capacitive sensor printed circuit board (PCB). Water resistance is achieved by connecting the guard electrode instead of grounding the shaded portion (blue) around the sensor.
Figure 2: Waterproof function using protective electrode
The signal that drives this electrode is the same as the signal that is connected to the sensor. Therefore, when the water drops on the sensor, the potential difference between the shadow area and the sensor does not form, and no more capacitance is coupled to the sensor, so that the waterproof effect can be achieved. If the sensor is completely immersed in water, a protection mechanism is activated to disable the sensor's operation.
Since many appliances operate with large currents, the power supply usually generates huge noise/ripple due to changes in load current and digital switches, and the digital switch is also coupled to the capacitive sensor, thus affecting the use.
The reliability of the interface. Based on the correct schematic and layout guidelines, we can reduce the ripple in the power supply by techniques such as ground wire layout to ensure that there is no ground bounce. However, it is difficult to completely remove the noise. If the reference is driven by the +ve line of the power supply, a false alarm of capacitive sensing may occur.
By switching the sensor between GND and VREF (internal generation), any change in the power supply will not cause an erroneous trigger as long as it is within the specified product operating limits.
Higher integration, lower cost
The SoC features integrated on-chip peripherals and hardware-based features that help designers implement most or all of their electrical functions.
In today's highly competitive consumer market, appliances must have a rich set of features. Integrated SoCs not only integrate more and more application features, but also reduce overall system cost, making them the best choice for OEMs. This method is also applicable to small appliances such as induction cookers and microwave ovens, as well as large appliances such as washing machines and refrigerators. Of course, large appliances still require special control for specific functions such as FOC motor control.
Smart solar outdoor light with both lighting and RGB colorful lighting, can be charged with USB and solar panel. Once it has sunlight, the solar panel can be automatically charged , the charging way is very environmentally friendly. We added a USB charging way so that it can be quickly charged via the USB cable in cloudy day or rainy day.
The outdoor light is solar-sensing, it will automatically turns off when in the bright enviroment, then begin to charge by solar. When the night comes, it will automatically turn on in the dark. Waterproof IP65 makes users no need to worry when using in the rainy day.
Equipped with a detachable plastic sticker, it can be used to decorate the lawn, garden, beach... After removing the plastic sticker, it can be placed on the table as an ambient light. They will be stars fall into your garden, twinkle in the dark and go off in the day. Automatic cycle colorful mode makes parties begin at anytime and anywhere.
Our LED products can meet global quality standards and pass European testing by TUV Rheinland. Bulbs have certifications such as EMC, RED, LVD, ROHS, REACH, ERP and FCC.
With the exclusive designed 2.4G remote controller, get you off the switch and turn on / off the lights anywhere, one remote controller can set 4 groups, each group is recommended to match up 8pcs bulbs, one remote controller can max control 32 bulbs. This remote controller is suitable for all 2.4G versions of RGBW products under [linkuphome".
The remote control uses colorful touch buttons, the color touch buttons are comfortable and sensitive. The remote controller has the functions of grouping, lighting, brightness adjustment, color light automatic cycle mode, three cycle speeds can be choosed. The wireless control distance is around 20 meters. Low power consumption makes the remote controller only need 4pcs AA batteries, but can be used for two years.
Description: RGB Outdoor Solar Lamp with 2.4G Control
Product Model No. C2
Product dimension: 155mm *165mm
Material: ABS+PC
Lamp Color: 8pcs RGB lamp beads+4pcs Warm White lamp beads
Lamp Current: 15-20mA
Power: 0.5W (15LM)
Battery Capacity: 1000mA (Li battery included)
Battery Voltage: 3.7V
Battery Duration: 9h(by USB charge for 1.5h) , 5h(by solar panel for whole sunny day)
Solar Panel: Monocrystalline silicon
Solar Panel Voltage: 6V
Solar Panel Output: 130mA
Waterproof Level: IP65
Control Qty: 1-32pcs
Packing: color box
Warranty: 1 Year
Charge Mode: Solar Panel and USB
Control Distance: 20m
Color box size: 22.2*20.6*5cm
G.W. of Unit: 0.55kg
N.W. of Unit: 0.34kg
Certification: CE(EMC,RED) ROHS,IP65,FCC
Description: 2.4GRF Wireless RGB Remote Controller
Product Model No.: R1
Product dimension: 105mm *33mm,
Product Net Weight: 150g
Material: ABS
Battery: 4*AA Battery (not included)
Working Voltage: 6V
Standby Power: 3 mW
Frequency Band: 2400-2483.5MHz/2.4GHz
Control Distance: 20m
Control bulb qty: 1-32 pcs
Packing: color box
Warranty: 1 Year
Color box size: 16.7*14.7*4.5cm
G.W. of Unit: 0.22kg
N.W. of Unit: 0.15kg
Outdoor Lamp With Remote Control
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Ningbo Homey Photoelectric Technology. Co., Ltd , https://www.linkuphome.com