Update content/hardware/02.hero/boards/uno-r4-wifi/tutorials/opamp/opamp.md

Author: jacobhylen

content/hardware/02.hero/boards/uno-r4-wifi/tutorials/opamp/opamp.md

@@ -51,7 +51,7 @@ The simplest way to test the OPAMP is to configure it as a voltage follower by c
 
 ***Caution: When amplifying the voltage of a battery using an operational amplifier, you should be aware of potential risks. The amplification process can lead to a high current draw, essentially placing a significant load on the battery, which may result in overheating, damage, or even pose a security risk. To mitigate this risk, you may for example add a resistor in series with the battery.***
 
-A voltage amplifier, as the name suggests, amplifies the voltage. A simple 2x amplifier can be built using e.g. two `10k` resistors. Connect one resistor between "minus" and GND. Then use the second resistor to connect the output and "minus" together. a circuit diagram [can be seen below](#circuit). Any signal input at "plus" will now appear with double the amplitude at the output pin. Of course, the input signal and the Arduino board should share the same `GND`. 
+A voltage amplifier, as the name suggests, amplifies the voltage. A simple 2x amplifier can be built using e.g. two `10k` resistors. Connect one resistor between "minus" and GND. Then use the second resistor to connect the output and "minus" together. A circuit diagram [can be seen below](#circuit). Any signal input at "plus" will now appear with double the amplitude at the output pin. Of course, the input signal and the Arduino board should share the same `GND`. 
 
 ***The amplified output signal should not go above ~4.7 V, otherwise clipping will appear and you can damage the board***