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00:00:00 – 00:05:58
The video discusses the modification of a wireless keyboard to use a rechargeable lithium battery source instead of double AA batteries for convenience. The speaker explains the process of creating an external power source using rechargeable batteries and USB charging modules. They detail the charging and battery protection circuits, aiming for a 1A charge current. Options considered for powering the setup include diodes, a linear regulator, and a DC to DC converter module, with the latter chosen for its 3.3-volt output using an SDB628 chip. The presenter showcases the connection of components and mentions potential improvements like precise voltage adjustment and battery monitoring. Overall, the speaker is satisfied with the upgraded keyboard setup achieved.
00:00:00
In this segment of the video, the speaker discusses their 10-year-old wireless keyboard powered by double AA batteries, which they find inconvenient due to the need for spare batteries. They plan to upgrade the keyboard with SMD reflow soldering using components from PCBWay. The speaker modifies the keyboard by creating an external power source using rechargeable lithium batteries and USB charging modules from AliExpress. They explain the schematic and details of the charging and battery protection circuits, aiming for a 1A charge current but considering 500mA for lower capacity cells. The speaker adds a battery protection circuit to the setup. They cautiously consider the voltage output of the new battery compared to AA batteries for compatibility with the keyboard’s circuitry.
00:03:00
In this part of the video, the presenter discusses options to power a device using two AA batteries. They consider using diodes, a linear regulator, or a DC to DC converter module. They opt for the DC converter module that outputs 3.3 volts. The module utilizes an SDB628 chip in a unique configuration. They demonstrate how the components are connected and showcase the functionality of the setup. The presenter highlights potential improvements such as adjusting the output voltage precisely and implementing battery monitoring. Despite these improvements, they express satisfaction with the rechargeable keyboard setup achieved.