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DLIGHT Ambient Light Sensor - BH1750FVI-TR - Unit extension module for M5Stack...

Index: MSS-20860

M5StickC HAT - DLIGHT Ambient Light Sensor - BH1750FVI-TR

Index: MSS-20881

M5Stamp C3U - with Espressif ESP32-C3 RISC-V microcontroller - WiFi - with pin headers...

Index: MSS-20862

MakeBlock CyberPi Go Kit - set with microcontroller and Pocket Shield

Index: TRB-21194

MakeBlock CyberPi - set with microcontroller, sensors and accessories

Index: TRB-21193

Marten, mouse and rat repellent - ultrasonic - IP65 - Viano OD-12

Index: VIA-21399

micro: Maqueen Lite Skin Pack - for Maqueen Lite - green - DFRobot FIT0883-R

Index: DFR-21226

Limit switch 50mm - Pololu 1403

Index: PLL-00017

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Light control sensor MCE34 - 2000W

Index: MOD-07010

On sale!
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LED panel ART ultra slim round, 300mm, 25W, 1750lm, neutral

LED panel ART 4301597 ultra slim round, 300mm, 25W, 1750lm, neutral color

Index: MOF-14451

On sale!
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Xadow Basic Sensor - accelerometer, light and temperature sensor + Cortex M0

Index: SEE-09667

On sale!
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Analogowy czujnik temperatury LM35 - DIP

MLX90614ESF-BAA IR - digital infrared thermometer I2C - SparkFun SEN-09570

Index: SPF-02526

On sale!
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Splitter for LED strip - 6 inputs - 6-24V/3A

Index: LEC-11647

On sale!
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BeagleBone Black Farnell case - black

Index: BBB-01962

Reduced price
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Case for Allo Sparky and dedicated extensions - acrylic

Index: ALL-07557

On sale!
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Creality CR-10S Pro kit of spare parts

Index: CRL-15764

On sale!
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Servo Feetech FC-SRB-002 - standard

Index: FTC-09211

BeagleBone Black case - transparent

Index: BBB-07919

On sale!
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M5StickC Servo overlay - servo for M5Stick

M5StickC Servo - servo hat

Index: MSS-18043

Reduced price
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Servo 1111 for RoboBuilder 5720T Black

Index: ROB-14465

On sale!
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All promotion products

Chargers

For a long time, the devices were powered by a cable, which meant they were not mobile in any way. They could only be used stationary and only in places where a power source was available. Today, we appreciate the freedom of movement and the greater possibility to use many devices anywhere, outside the home or office. These are battery-powered devices. Advanced technology has also allowed us to significantly reduce the size of some devices so that we can fit them in a trouser pocket or a bag or backpack. This is also due to the small size of the cells, but with their high power density. However, many batteries, especially lithium-ion batteries, need a charger to work properly and continuously. In addition, discharge controllers play an important role today, so that we can avoid a complete cessation of operation. This is of great importance for the protection of data against data loss as well as for continuity of operation. Our offer includes chargers designed for lithium-ion batteries in various variants. Check our options!

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Reference voltage source LM385Z - 2.5V

System LM385Z-2.5V reference voltage of 2.5 V.

Index: PAS-04930

Index: PAS-04930

Charging controllers and lithium cell charging process

Did you know you can build a lithium-ion cell charger yourself? This is possible thanks to special charging process controllers that have been developed to allow users to create their own charger to suit their individual needs. For optimal working conditions, lithium-ion and lithium-polymer batteries need to be charged in the right way, according to specific rules. It is worth following the general guidelines to protect the battery from possible damage and failure. It is important to know that the charging process must not take too long, as this causes the risk of a cell explosion.

Lithium-ion cells have high requirements for their use. Despite this, they are often chosen for electronic designs and used in many everyday and professional applications. The voltage in the cell must not be lower than the manufacturer's predefined threshold, which usually ranges from 2.8 V to 3.0 V. If the battery is discharged below this predefined limit, damage or even loss of some capacity is possible. It is also harmful to exceed the maximum voltage of the cell, resulting in irreversible failure and, in extreme cases, explosion and fire.

How to charge lithium-ion cells?

Charging consists of two stages. In the beginning, the cell is charged with a DC current of 0.5 to 1 C. If the voltage in the cell is about 4.2 V, the second phase of charging begins. During this phase, the voltage is maintained at 4.2 V, but the current that is drawn by the cell gradually decreases. If it drops to less than 0.1 C, the signal that the battery has already been charged.

Systems are powered in different ways, sometimes only a single lithium-ion battery will work well, and sometimes a more advanced system is required. Simple linear stabilisers and step-down converters are often used for power supply. This is due to the operation of modern electronics with a voltage below the nominal operating voltage of the lithium-ion cell. If you want to create a complete integrated power system, you can supplement it with an integrated charger. Why is this such a great convenience? First of all because it is not necessary to remove the battery from the device in order to recharge it. We charge the device by connecting an external power supply.

The Botland store offers lithium-ion cell chargers with different levels of sophistication. We also offer integrated charging process controllers that allow you to build chargers yourself. With such solutions you will ensure the mobility of your electronic equipment and greater freedom and safety of using them without having to connect to a power source.