In low-power IoT devices and sensor networks, power system design is a key factor that determines performance, lifespan, and maintenance costs. In particular, combining batteries with energy harvesting in a hybrid power design is gaining attention as a way to ensure continuous power supply and sustainability at the same time. Why Hybrid Power Design Is Needed Using only a battery power source shortens replacement or charging cycles over long-term operation, increasing maintenance costs. On the other hand, relying solely on energy harvesting may result in unstable power output. Combining the two approaches can provide both power stability and operational efficiency . Key Components Energy Harvester – Select the right source for the environment, such as photovoltaic (PV), thermoelectric generator (TEG), piezoelectric device, or RF harvesting module. Battery – Choose lithium-ion, lithium-polymer, or coin cell based on capacity, lifespan, and charge/discharge characteristi...

On a hot summer day, a refreshing scoop of ice cream used to be the classic way to beat the heat. But recent data shows that this trend may be shifting. In the summer of 2024, ice cream sales in Korea dropped by 35% , while more and more consumers are opting for cold drinks to cool down instead. What’s driving this shift in behavior? 1. When It’s Too Hot, Ice Cream Becomes Less Appealing When temperatures hover in the low 30s (Celsius), ice cream sales tend to increase. However, when a heatwave pushes the temperature past 35°C , consumers gravitate toward cold water, sports drinks, iced coffee, and soda — options that quench thirst more quickly. Ice cream, after all, is a dessert, not a hydration solution. 2. Drinks Are Faster and More Convenient With a cold drink, you just twist the cap and drink. Ice cream, on the other hand, melts quickly, can get messy, and takes time to eat . In extreme heat, consumers prioritize speed and ease — factors that clearly favor beverages. ...

Have you ever lost your car key or found it bothersome to pull it out of your bag? What if you could unlock and start your vehicle using only your smartphone? Digital keys make that scenario a reality. Combining technologies like NFC, BLE, and UWB, digital car keys are rapidly becoming a standard feature among major automotive brands. What Is a Digital Key? A digital key is a technology that allows your smartphone or smartwatch to function as your car key. With it, you can lock/unlock the doors, start the engine, or open the trunk—without a physical key. Some manufacturers also allow you to share your digital key with family or friends for limited access. Core Technologies Behind Digital Keys NFC (Near Field Communication): Unlock by tapping your phone near the door handle. Offers high security and fast connection. BLE (Bluetooth Low Energy): Allows for automatic detection when the smartphone approaches. Enables remote lock/unlock and start. UWB (Ultr...

When it comes to Korean-style Chinese food, two of the most popular and debated dishes are undoubtedly Tangsuyuk and Kkanpunggi . Although both are beloved deep-fried meat dishes, they differ in flavor, preparation, and even cultural background. Let’s break down what sets these two iconic dishes apart. 1. Tangsuyuk: The Sweet and Sour Classic Tangsuyuk (탕수육) is the Korean interpretation of the Chinese "Tang Cu Rou" (糖醋肉), meaning sweet and sour pork. The Korean version typically uses deep-fried pork or beef coated in potato or sweet potato starch, served with a glossy sweet and sour sauce made from vinegar, sugar, soy sauce, and fruit juices. One interesting cultural quirk is how Koreans often debate whether to pour the sauce over the meat or dip the meat in sauce. It’s so common it even has terms: “pour-over” group ( 부먹 ) vs. “dip-in” group ( 찍먹 ). 2. Kkanpunggi: Spicy, Garlicky, and Stir-Fried Kkanpunggi (깐풍기) is a Korean-Chinese adaptation of the C...

When starting a diet, salads are often the first thing that comes to mind. But eating plain greens every day can leave you hungry and unmotivated. The key is combining low carbs, high protein, and healthy fats in one satisfying bowl. Here’s how to build a truly effective low-carb salad! Core Principles for a Low-Carb Salad Limit carbs: Avoid potatoes, sweet potatoes, corn, and carrots Protein is essential: Chicken breast, boiled eggs, salmon, tofu, etc. Healthy fats matter: Add avocado, olive oil, or a few nuts Choose digestible greens: Romaine, spinach, cabbage, cucumber, broccoli 3 Recommended Low-Carb Salad Combinations ① Chicken Avocado Salad Ingredients: 100g grilled chicken breast, ½ avocado, spinach, cucumber, broccoli Dressing: Olive oil + lemon juice + pinch of salt Tip: High in protein and very filling ② Salmon & Green Bowl Ingredients: Smoked or grilled salmon, mixed greens, kale, arugula Dressing: Balsamic vinegar + o...

Check These Power Requirements Before You Install an Induction Cooktop Induction cooktops are becoming increasingly popular due to their fast heating, energy efficiency, and modern appearance. However, because they are high-power electrical appliances , it's essential to check your home's electrical system before installation. This post covers the 5 key power-related conditions you should check before installing an induction cooktop. 1. Check Your Contracted Electricity Capacity Typical induction cooktops consume 1.8kW to 3.0kW . Larger 2- or 3-burner units may consume over 7kW . You must first verify your household’s contracted power capacity (e.g., 3kW, 5kW, 7kW) . Less than 3kW: Suitable only for small single-burner cooktops 5kW or more: Supports 2 or more burners without issue 2. Do You Have a Dedicated Circuit? (No Power Strips!) Induction cooktops draw high current at startup, so a dedicated circuit is required . Power strips or shared out...

Among the countless components that make up electronic devices, the capacitor is a key element that cannot be excluded. What structure does this small part have, what role does it play, and why is it essential in all electronics? In this article, we’ll clearly explain the basic structure, types, and usage of capacitors.     1. Basic Structure of a Capacitor A capacitor basically consists of two conductor plates (electrodes) with an insulator (dielectric) sandwiched between them. Its main function is to provide capacitance , a space to store electric charge. When voltage is applied to the plates, one stores positive and the other negative charges, accumulating energy . 2. How a Capacitor Works Current does not flow through it, but the capacitor stores and discharges charges in response to voltage changes . Thanks to this characteristic, capacitors are used for voltage stabilization, filtering, and timing control in circuits.   ...