All Questions
Tagged with component-failure pwm
4
questions
6
votes
4
answers
780
views
PWM Dimming of a Low-Voltage DC Incandescent Filament (Thermal Shock?)
I plan on driving some Numitron tube filaments from an IV-16 tube (datasheet here). For ease of access I'll give the key specs here:
Nominal filament voltage: 3.15V
Max filament voltage (steady-state)...
- 141
4
votes
3
answers
606
views
MOSFET driver blows out in half-bridge DC motor PWM controller
EDIT: I've redone the MOSFET circuit diagram; it now represents what my actual layout is. I wanted to spare myself redrawing the circuit but ended up confusing everything, I hope it's clearer now!
...
- 149
6
votes
2
answers
2k
views
DC-DC converter failure after adding a capacitor to the circuit
simulate this circuit – Schematic created using CircuitLab
The above schematic is used to heat a 2.4-ohm load. I am using a power supply from Meanwell GST280A24 280W at 24V. In the MCU it is ...
- 285
0
votes
3
answers
811
views
Failing to understand and to fix a PWM spindle controller circuit
My CNC controller worked for many hours without trouble. But recently the resistor R5 (red circle) started to melt each time I switch my CNC spindle on, and even at low RPMs. It is 100 ohms, compared ...
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