When a problem occurs LED on the EGS002 module is blinking. The LED flashes several times according to the type of problem that occurs.
The LED warning indication will flash twice when there is Over Current, three times for Over Voltage, four times for Under Voltage, and five times when there is over temperature.
Why need an EGS002 audible?
The problem is that when the circuit is put in the box the LED Warning indication is not visible, especially for self-made inverters or do-it-yourself projects where the PCB is installed only with an H-bridge circuit.
So I need an audible warning indication on EGS002 Module.
Audible Warning Indication Installation
A simple circuit like the one in the picture makes the EGS002 module beep an audible sound when a problem occurs.
It only takes a 5V active buzzer, a 2N3904 transistor, and a 1.2 kOhm resistor is needed for this purpose.
I use the idle LCD PORT to place the component. The 1k2 ohm resistor soldered to the LED pad on EGS002 Module, thus avoiding direct connection to EG8010. The LAMP Pad on the LCD PORT is not connected anywhere, so I used it to connect the base transistor and resistor. Then I attach the emitter transistor to the LDC PORT ground, the collector is attached directly to the Active Buzzer (-). Active Buzzer (+) is directly installed on the LCD PORT + 5V.
You can use the equivalent transistor which is easily available, for this purpose. Like the BC547, S9014, or any other NPN transistor.
It’s pretty practical and cheap to work with, but if you have a spare EGS002 module you’ll have to modify it too to make it sound. That’s the downside of this method.
That’s all, now just reinsert it into the inverter and now the inverter will beep when a problem occurs. Apart from that, you can check out the following video.
simple, isn’t it?