Summary of PIC16F627 RPM MEASUREMENT CPU FAN SPEED INDICATOR CIRCUIT
This project is a PIC16F627-based RPM measurement circuit that measures CPU/fan speed independently of the PC and displays the result on four 7-segment displays. The firmware is written in PIC assembly. It can also show fan speed via PC software or be checked in BIOS when installed in a system. The device is intended as a standalone CPU cooler/fan speed tester.
Parts used in the PIC16F627 RPM MEASUREMENT CPU FAN SPEED INDICATOR CIRCUIT:
- PIC16F627 microcontroller
- 4 units of 7-segment displays
- Resistors (for segment current limiting and pull-ups)
- Transistors or driver ICs (to drive 7-segment displays)
- Crystal or resonator (clock source for PIC)
- Capacitors (decoupling and for oscillator)
- Connector for fan tachometer input
- Power supply components (regulator, capacitors)
- PC interface components (optional, for Windows application connection)
- PCB or prototyping board and wiring

RPM measurement circuit PIC16F627 microcontroller based on the speed of the fan is displaying on the display. Software in assembly language prepared.
PICMicro Project. measure the speed of the CPU’s fan and display it on an application in Windows or you can simply go to the BIOS Menu when the computer resets and read the fan speed directly from there.
measuring/test CPU Cooler Fans independent of the computer. And here it is, a PIC16F627 based CPU Cooler Fan Speed Tester. The speed is displayed on 4 units of 7 segment display
RPM MEASUREMENT CIRCUIT
Source: PIC16F627 RPM MEASUREMENT CPU FAN SPEED INDICATOR CIRCUIT
- What microcontroller is used in this rpm measurement circuit?
The circuit uses a PIC16F627 microcontroller. - How is the fan speed displayed?
The speed is displayed on four 7-segment displays. - Is the tester independent of the computer?
Yes, it measures and displays fan speed independently of the computer. - Can the fan speed be read in Windows?
Yes, the project mentions displaying the speed on an application in Windows. - Can the fan speed be read in BIOS?
Yes, you can also read the fan speed in the BIOS menu when the computer resets. - What language is the firmware written in?
The software/firmware is written in PIC assembly language. - What is the project intended to test?
It is intended to measure and test CPU cooler and case fan speeds. - How many 7-segment displays are used?
Four 7-segment displays are used to show the RPM.
