This design is a dual 6V to 18V input to settable 1.5A output switching regulator supply.
Main purpose is to power up conference badges in display cases.
The output voltage is set by R8 and R10. Pick the proper resistor value based on the table below:
| Rx | output V | Typical use |
|---|---|---|
| 7.68k | 5V | USB powered |
| 8.66k | 4.5V | 3x AA/AAA replacement |
| 13k | 3.3V | LiPo replacement mid charge |
| 14.7k | 3V | coin cell or 2x AA/AAA replacement |
NOTE you MUST remove the battery when using this design as a battery replacement!
J1, J2, and J3 are supply side input / output jacks. Cards are designed to be daisy chained between display using 5.5x2.5mm cables
J4, J5, J6, J7, and J8 are output 1 controlled by R8
J9, J10, J11, J12, and J13 are output 2 controlled by R10
Populate connectors based on your needs.
Thinking about making a smaller / cheaper single reg version as well in the future.
This is a KiCad 5.0 project.
This is a XLS/PDF dump of the spreadsheet documentation I was using during development.
PCB design can be found here: https://www.oshpark.com/shared_projects/n03EZh99
Copyright (c) 2018 Peter Shabino
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