The Smell of Molten Projects in the Morning

Ed Nisley's Blog: Shop notes, electronics, firmware, machinery, 3D printing, laser cuttery, and curiosities. Contents: 100% human thinking, 0% AI slop.

The New Hotness

  • RAMPS 1.4: Simulated Heater

    Epoxying a 100 kΩ thermistor to a 909 Ω resistor (because I have a bunch of them) serves as a simple heater tester:

    Simulated heater - thermistor bonding
    Simulated heater – thermistor bonding

    It dissipates 450 mW, raising the temperature enough to let the PWM control kick in, but not enough to get scary hot.

    Some heatstink tubing prevents reduces the likelihood of horrible accidents involving the 20 V motor / heater power supply:

    RAMPS 1.4 - Simulated heaters
    RAMPS 1.4 – Simulated heaters

    Keeping it under 50 °C seems like a Good Idea:

    RAMPS 1.4 - Simulated heater - LCD
    RAMPS 1.4 – Simulated heater – LCD

    Not that I have a need to heat anything, but the MOSFETs work!