Subscribe to this blog's feed
For those looking for circuit inspiration, here's a Design Idea freshly uploaded to the site - Alarm monitors rotational speed of DC motor (click on the circuit diagram to expand it).
It covers monitoring the rotating speed of a DC fan motor, sounding an alarm and powering down if the motor stalls.
The Design Idea begins:
Read the full Circuit Design Idea
It is courtesy of Peter Demchenko, of Vilnius, Lithuania.
View all the Circuit Design Ideas on Electronics Weekly
It covers monitoring the rotating speed of a DC fan motor, sounding an alarm and powering down if the motor stalls.
The Design Idea begins:
You can use the circuit in Figure 1 to monitor the rotating speed of a dc fan motor and sound an alarm if the motor stalls. One potential application of the circuit is monitoring the CPU-fan speed in a PC in which overheating the CPU can ruin the whole system.
A PC BIOS (basic input/output system) often has a limited capability for monitoring the speed of CPU or chassis fans during boot-up. Moreover, if you enable the CPU-fan-protection function of BIOS today, you can have a problem with it tomorrow: If the fan's starting acceleration slows down, the BIOS powers down the PC at the beginning of the boot sequence, not allowing you to go into BIOS settings to correct the situation. So, the manual often advises you to disable this fan function.
Read the full Circuit Design Idea
It is courtesy of Peter Demchenko, of Vilnius, Lithuania.
View all the Circuit Design Ideas on Electronics Weekly
Recent Comments