u/Apprehensive_Bet6145

I’m currently in a hotel in Xi'an and I’m literally melting. Every time I ask for water at a restaurant, they bring me a glass of literal boiling water. I get the cultural health benefits, but I’m a sweaty American who just wants a glass of ice. My hotel room only has a kettle, no fridge. How do I communicate that I want my water at sub-zero temperatures without being that tourist?

I’m controlling a 12V brushed DC motor using a PWM controller at 10 kHz. At low and high duty cycles, the motor behaves normally, but between roughly 40–70% duty cycles I get noticeable speed fluctuations. The setup includes a 12V brushed DC motor rated at 3A, a PWM controller running at 10 kHz, no feedback loop (open-loop control), and a small centrifugal pump as the load. The issue shows up as audible oscillations in speed and inconsistent pump flow, although the motor temperature remains stable.
I suspect it could be related to PWM frequency choice, interaction with motor inductance, or instability in the load torque.

Does anyone else feel like they’re just posting for the algorithm rather than their actual customers? I spent three hours on a deep-dive post that got zero reach, then I posted something trendy and it blew up. It feels like I’m losing the soul and the voice of my brand just to get views. I guess we just have to adapt.

No matter how much sleep I get, I look exhausted. My eyes look sunken and dark. Any makeup tricks to look more awake?