DIP Switches

The DIP switches offer flexibility and customization, allowing you to tailor the power board's functionality based on your specific console version, battery charging capabilities, and LCD screen requirements.

The power board I have developed features three DIP switches that provide various options and functionalities:

1. VA0 / VA1: This switch enables a more stable low battery indicator specifically designed for the original Sega dual-ASIC VA0 console. For the VA1 and all SYF mainboards, it is recommended to keep the switch set to VA1.
2. 1.0A / 0.5A: This switch allows you to choose the maximum battery charging current. The appropriate setting depends on the capabilities of your USB-C power brick and the batteries you are using. If your power brick can deliver 1.5A and your batteries can handle 1.0A charging current, you can switch it to 1.0A. However, if you are unsure or using different specifications, it is recommended to keep the switch set to 0.5A.
3. 34V / 5V: This switch is only available on the 34V version of the board. With this option, you can enable or disable the output of 34V to pin 9 of the connector. This feature is particularly relevant when using the board with the original SEGA Game Gear LCD, the requires 34V for the contrast circuit. Please note that this switch is not applicable to boards without a 34V voltage regulator

LiPo battery recommendation

I have been testing with the following sizes LiPo batteries:

• 124050 - 12x40x50mm 3.7V 3000mAh - Type L380
• 104050 - 10x40x50mm 3.7V 2500mAh - Type L374
• 103450 - 10x34x50mm 3.7V 2200mAh - Type L342

​The 124050 is the maximum size that fits into the battery component. I strongly recommend a larger 2500-3000mAh battery in case you use a less power efficient LCD screen (McWill, RetroKai, Funnyplaying).

Gerber

In case you like to make your own board, you can download the gerber, BOM and PNP files here. Keep in mind the project has a Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) license.