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Solution Architecture
Module Selection: Miniature surface-mount PIR modules (e.g., HC-SR501) with size <20mm×20mm for integration into embedded lighting (ceiling lights, corridor lamps).
Linkage Logic: Connect to MCUs (e.g., ESP32) via GPIO for "person detected - full brightness; person present - dimmed; person leaves - 30s delay off" control. Integrate light sensors (e.g., BH1750) for daytime auto-shutdown.
Energy Savings: Reduces lighting energy consumption by 30%-50% compared to traditional switches, ideal for corridors and bathrooms.
Typical Scenarios Smart Homes: Integrates with Alexa/Mijia systems, allowing APP-adjustable sensing distance and delays. Commercial Lighting: Mall corridors use zoned sensing via RS485 bus for collaborative multi-module control.
III. Optimization of Sensing Solutions for Security Systems
Enhanced Intrusion Detection Design Anti-Interference Technology: Dual-element complementary sensors suppress ambient temperature interference; pulse counting (2 consecutive pulses trigger alarm) reduces false positives. Multi-Dimensional Linkage: Combines with microwave radar modules (e.g., HB100) for "infrared + microwave" dual detection, triggering alarms only when both activate to avoid curtain sway or insect interference. Concealed Installation: Modules with integrated lens-housing designs (e.g., RE200B) hide within ceilings or decor for covert security. Data Transmission and Response Wireless Transmission: LoRa modules (e.g., EBYTE E32-433T30D) enable low-power long-range (3km open area) data upload, suitable for villa/factory perimeter security. Rapid Response: <0.5s trigger delay, with local buzzer alerts and cloud notifications (via NB-IoT) within <3s.
IV. Selection and Deployment Considerations
Environmental Adaptation Avoid direct exposure to air vents/heating sources. Install at 2.2-2.8m (indoor) or 3-5m (outdoor) height, tilted 15°-30° to cover human activity zones. Outdoor use requires IP65 waterproof modules (e.g., AM312-IP67) with sunshades to minimize solar interference. Cost-Reliability Balance Consumer scenarios: HC-SR501 (~$2/unit); industrial use: Prioritize stability (e.g., Panasonic EKMC1603111, temp drift <±2%/℃). Batch deployment: Reserve 10% redundant modules with self-diagnostic voltage checks for fault

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Hi everyone,

I recently left my 9-to-5 corporate job after almost a decade to chase something I’ve always dreamed about—starting my own food business. It started small: just a cloud kitchen running out of a rented space, late nights testing recipes, early mornings handling orders, and zero regrets so far.

Now, with some loyal customers, decent growth, and a lot of love from the community, I’m slowly working toward turning this little kitchen into a walk-in café. It’s a scary, exciting step—but I want to do it right.

That brings me to this post. As we grow, I want our team to look as professional as we feel. We’re in the market for good-quality chef coats for kitchen staff—something that’s breathable, durable, easy to wash, and doesn't look sloppy after a long day. Style matters too, since we’ll be customer-facing soon.I found a brand called Lintex online. They seem pretty legit, offer kitchen uniforms, long sleeve chef coats, and even frontdesk uniforms (which could be useful later). Their site looks solid, but I’ve never ordered uniforms before, and I’m a little nervous about fabric quality and fit.

Has anyone here ordered from Lintex before? Would love to hear your suggestions. Thanks in advance!

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At Lintex, we understand that being a doctor means more than long hours and tough calls; it also means showing up every day ready to move, think, and care with confidence. That’s why we design scrubs for doctors that are built for real-life performance without compromising on comfort or style.

Our collection of doctor scrubs is crafted with breathable fabrics, smart tailoring, and functional features like strategically placed pockets, wrinkle resistance, and movement-friendly cuts. Whether you're making rounds, managing emergencies, or staying on your feet during surgeries, Lintex scrubs are made to support your every move.

We don't believe in one-size-fits-all. From classic V-necks to modern fits, we offer options that let you choose what works best for your body and your role. If you're looking for the best scrubs for doctors, you’re in the right place.

Join the Lintex community and discover the best scrubs for doctors that work as hard as you do.

Explore more at www.lintex.in or drop us a line at reachus@anvka.com

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J

I'm an Oral-Maxillofacial Surgeon working with a trauma hospital and academic setup in Delhi. We get our 3D models, from Curewith3D, a dedicated 3D lab equipped with FDM and SLA 3D printers, focused on presurgical planning and patient-specific modeling.

We routinely use 3D printed anatomical models, especially for complex facial reconstructions, TMJ cases, and orthognathic surgeries. They’re invaluable for surgical rehearsals, resident training, and most importantly, patient education. When patients can physically hold their jaw model and understand the procedure, consent becomes more informed and anxiety levels drop.

As for printing surgical instruments or implants, we’re cautious. While the 3D orthopedic implants we design are precise and patient-specific, their final manufacturing still goes through standard biocompatible grade processes. Like in most regions, concerns about sterilization, structural integrity, and litigation prevent experimental tools from entering the OR directly. That said, the potential for custom joint replacement implants and 3D knee replacement implants in underserved areas is enormous. We see 3D printing as a huge enabler in low-resource and humanitarian settings.

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Signal Hunt: An ESP-NOW Workshop & Treasure Hunt

Hello everyone! We’re planning on organizing a two-phase event that explores device-to-device communication using ESP-NOW protocol :

Workshop: Participants learn to build and program ESP32-based receivers with a web interface that directly exchange signal data using ESP-NOW for RSSI-based distance approximation.

Signal Hunt Competition: Equipped with these receivers, participants will track hidden ESP32 transmitters scattered around the campus, each with distinct point values.

Current hardware setup:
Reciever(one per team):
Esp32 ~ 360rs
9v battery = 20rs
9v battery clip= 5rs
buck converter (MP1584 or LM2596) ~ 45rs
Perfboard + male to female berg strip ~30rs
Total per reciever ~ 460rs
Transmitters :6
Components same as recievers = 460*6~2760rs

(using non-rechargeable batteries to reduce cost,
will using a 7805 voltage regulator IC be a viable way to reduce cost further?)

We’d love your suggestions on ways to simplify hardware, reducing the cost, secure partnerships and funding, or enhance the interactive elements. Thank you, looking forward to any ideas that can help make the event engaging and successful!

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