How to fix HC05 burning even after while using voltage regulator? I'm using two circuits for my wireless head mouse project, one of them is a transmitter circuit with Arduino Pro Micro, HC05 Bluetooth module, Elechouse Voice Recognition Module V3.1, GY-521 module based on the MPU6050 sensor. The receiver circuit (Arduino Pro Micro + HC05 Bluetooth) will receive the sensor readings from the transmitter circuit. Both modules were powered by USB from the laptop initially. They worked fine. To make the transmitter circuit completely detached from the laptop, I used a 9V battery, and a voltage regulator of 5V. The receiver circuit was still c. I should mention that I was using voltage dividers for both of the transmitter, and receiver circuit's HC05 Bluetooth modules.
onnected to the laptop USB.
.
After using the voltage regulator, the module was working fine but suddenly the HC-05 burnt, led stopped working. Transmission failed. HC05 of the receiver module also burnt after 2 minutes. Why did this happen? What's the solution?
Circuit connection:
Hc05 connection same for transmitter &amp; receiver circuit
HC05 Tx -&gt; Arduino Rx
Hc 05 rx -&gt; 2k ohm -&gt; gnd
Hc05 rx -&gt; 1k ohm -&gt; hc05 tx
Hc05 vcc -&gt; arduino 5v
Hc05 gnd -&gt; arduino gnd
Voice Recognition Module tx -&gt; arduino 8
Rx -&gt; Arduino 9
Vcc- 5v
Gnd - gnd
Mpu6050 sda - Arduino 2
Scl- Arduino 3
Vcc - 5V
Gnd- Gnd
Voltage regulator connection:
The connection was 9V battery +ve to input, -ve to ground, output to Arduino 5V
You said &quot;I should mention that I was using voltage dividers for both of the transmitter, and receiver circuit's HC05 Bluetooth modules.&quot;
Voltage dividers are not a good way to lower voltage for power components. The voltage output will vary based on load, and they also dissipate the excess voltage as heat, so you need high current resistors.
Post a schematic of your system with the specific batteries, regulators etc that you are using.