DIY

Simple charger (for Li-Ion batteries) with sound signaling of completion

Hello dear readers and homemade products!
Simple charger (for Li-Ion batteries) with sound signaling of completion

One One of the easiest ways to charge a wide variety of Li-Ion batteries is to use the TP4056 module. This module is equipped with two LED indicators – the charging process itself, and its successful completion.
Sometimes it is necessary to fully charge the battery, and as soon as possible to know about the completion of the process. Every time “running” and looking at the indicators is far from the best solution.
In this article, the author of the YouTube channel “Mextraf” will tell you how you can make a sound signaling when the battery is charging.
This homemade product is very simple and easy to repeat even a novice “solder”.
Materials necessary for homemade products.
– TP4056 – battery charge controller
– Battery 18650
– Active sound buzzer (buzzer)
– S8550 transistor (set of transistors)
– 2.2KΩ resistor (set of resistors)
Manufacturing process.
So, a simple buzzer will serve as a sound signal 5V with built-in generator (active).
Simple charger (for Li-Ion batteries) with sound signaling of completion The role of the switch will be played by the bipolar transistor S8550 .
If you place the transistor facing you and feet down, then the pins will be located as follows:
1 – emitter, 2 – base, 3 – collector (from left to right).
Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion The diagram for connecting the tweeter to the charging module is shown in the following picture.
 Simple charger (for Li-Ion batteries) with sound signaling about completion The wizard first solders the positive lead of the tweeter to the transistor collector.
Simple charger (for Li-Ion batteries) with sound signaling of completion Then, a 2.2KΩ resistor is soldered to the base of the transistor.
Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion The TP4056 Charge Controller will perform various protection functions. A resistor R3 is installed on it, which is responsible for the battery charging current.
The value of the resistor R3 can be selected according to the table shown in the third picture, and you can get the required charging current, according to the documentation for the battery.
Simple charger (for Li-Ion batteries) with sound signaling of completion  Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling about the completion of u> wires with a connector to make it easier to connect it to the charge module.
As soon as the power supply unit is connected to the charging module (ordinary charger for smartphones), the blue LED indicator lights up – “charging completed.”
After connecting the discharged battery to the module, the first indicator goes out, and the second one lights up – “the battery is charging.” < br> Simple charger (for Li -Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion After checking the operation of the circuit, and disconnecting it from the block and the battery, you need to solder the emitter of the transistor to the positive area on the module. The free leg of the resistor is also soldered to the charging completion indicator, as shown in the photo.
Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion The jumper between the minus of the buzzer and the negative pin of the module is soldered last. Ignore the red color of the wire – this is a minus.
Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Simple charger (for Li-Ion batteries) with sound signaling of completion Everything is ready, if you connect the module without a battery – the sound signal should immediately turn on. So the scheme is working correctly.
Simple charger (for Li-Ion batteries) with sound signaling of completion Now you can connect the battery, and as soon as it is charged, the buzzer will turn on. If the sound from it is too loud, the hole can be sealed with a piece of tape.
< img class = "aligncenter" alt = "Simple charger (for Li-Ion batteries) with sound signaling of completion" src = "https://usamodelkina.ru/uploads/posts/2021-04/1618530867_bzz-071.jpg"/> Simple charger (for Li-Ion batteries) with sound signaling of completion  Simple charger (for Li-Ion batteries) with sound signaling of completion Thanks to the author for a simple circuit for connecting the audio signal to the TP4056 charging module.
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The author's video can be viewed here.