Polish FPM post.

1 files changed, 13 insertions, 14 deletions

diff --git a/_site/projects/fpm-door-lock/index.html b/_site/projects/fpm-door-lock/index.html
index 96b1d2e..8557376 100644
--- a/_site/projects/fpm-door-lock/index.html
+++ b/_site/projects/fpm-door-lock/index.html
@@ -60,12 +60,12 @@ attached to the interior door knob. The MCU must be installed at the back of
 the door to prevent unauthorized users from tampering with it.</p>
 
 <p>When no one is interacting with the lock, the MCU is in deep sleep. The sensor
-and the servo each draw 13.8 mA and 4.6 mA of quiescent currents. To prevent
-this idle current draw, the MCU employs MOSFETs to cut off power to them before
+and the servo each draw 13.8mA and 4.6mA of quiescent currents. To prevent this
+idle current draw, the MCU employs MOSFETs to cut off power to them before
 entering deep sleep. Doing so is crucial for conserving the battery.</p>
 
 <p>Without power, the sensor remains in a low-power state, drawing approximately
-2.9 μA through a separate power rail. When a finger comes into contact with the
+2.9μA through a separate power rail. When a finger comes into contact with the
 sensor, the sensor triggers a pin change interrupt, waking up the MCU. The MCU
 activates a MOSFET, which in turn activates the sensor. Over UART, the MCU
 unlocks the sensor and issues commands to scan and match the fingerprint.</p>
@@ -95,7 +95,7 @@ page.</p>
 <h2 id="the-pcb">The PCB</h2>
 
 <p>For this project, I designed a custom PCB and had it fabricated by JLCPCB. Like
-the software, the circuit is chiefly concerned with optimizing power
+the software, the circuit is primarily concerned with optimizing power
 consumption and extending battery life.</p>
 
 <table style="border: none; width: 100%">
@@ -114,33 +114,32 @@ consumption and extending battery life.</p>
   </tr>
 </table>
 
-<p>To that end, the principal components of the circuit are the 2N7000 and
+<p>Consequently, the principal components of the circuit are the 2N7000 and
 NDP6020P field-effect transistors. They switch power electronically to the
 servo and the fingerprint sensor, the two most power-hungry parts of the
 circuit. The two MP1584EN buck converters play an axial role in efficiently
 regulating power to the MCU and the sensor.</p>
 
-<p>The ATmega328P typically operates at 5 V with a 16 MHz crystal oscillator. To
+<p>The ATmega328P typically operates at 5V with a 16MHz crystal oscillator. To
 further reduce power consumption, I modified the ATmega328P’s fuses to run at
-3.3 V with an 8 MHz crystal oscillator.</p>
+3.3V with an 8MHz crystal oscillator.</p>
 
 <p>The bottom right area of the PCB isolates the power supply of the servo from
 the rest of the circuit. This shields components such as the MCU from the
-servo’s high current draw, which can exceed 1 A. The IN4007 diode in slot U2
+servo’s high current draw, which can exceed 1A. The IN4007 diode in slot U2
 serves as a flyback diode, protecting the MOSFET from reverse currents
 generated by the servo.</p>
 
-<p>Lastly, the 56 kΩ and 10 kΩ resistors in slots R10 and R11 form a voltage
-divider circuit. Its output is fed to the ADC of the MCU, which measures the
-supply voltage by comparing it to the internal bandgap reference voltage.</p>
+<p>Lastly, the 56kΩ and 10kΩ resistors in slots R10 and R11 form a voltage divider
+circuit. Its output is fed to the ADC of the MCU, which measures the supply
+voltage by comparing it to the internal bandgap reference voltage.</p>
 
 <h2 id="epilogue">Epilogue</h2>
 
 <p>This project began nearly a year ago when I attempted to unlock our door
 wirelessly by writing to the UART ports of two MCUs connected to inexpensive
-433 MHz RF transceivers, as if there were an invisible wire between them.
-Although I failed, it led me down a rabbit hole of RF communications, MOSFETs,
-PCB design, and low-power circuits.</p>
+433MHz RF transceivers. Although I failed, it led me down a rabbit hole of RF
+communications, MOSFETs, PCB design, and low-power circuits.</p>
 
 <p>During the project, I reinvented the wheel many times. I implemented a
 low-level network stack using only RF modules and an 8-bit microcontroller,