How many of these do you still believe?
BMV080 is a low-power, low-cost PM1, PM2.5, and PM10 sensor module with I2C and SPI interfaces that sells for just $29.90.
Cyberpunk DIY watch shown at Open Sauce; wraparound displays on a flexible PCB, but $420 display cost blocks sales plans.
Light aircraft often use a heading indicator as a way to know where they’re going. Retired instrumentation engineer [Don Welch] recreated a heading indicator of his own, using cheap ...