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Std edition RC Model redundant BEC V2
Profile：I made my own redundant BEC module for RC models. It takes full battery voltage (usually 4 or 6 lithium cells in my case) and regulates it down to around 5 volts to power servos and other electronics.
Description
My design uses two separate LM2576 switching regulators that power the output through diodes to isolate them. I also have an extra output filter to minimize ripple and voltage spikes. My goal with this project was to create something that is more heavy-duty and reliable than most cheap BEC modules for RC models you can buy.
Design Drawing
schematic diagram
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PCB
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| ID | Name | Designator | Footprint | Quantity |
|---|---|---|---|---|
| 1 | 100uF | C4,C1,C3,C6 | CAP-D8.0XH10.5 | 4 |
| 2 | 1000uF | C2,C5 | CAP-D10.0XH10.5 | 2 |
| 3 | FC-3215GHK-570A08 | LED1,LED2 | 1206 LED AXBRI | 2 |
| 4 | 1K | R6,R5,R11,R12 | 1206 | 4 |
| 5 | 3K3 | R4,R10 | 1206 | 2 |
| 6 | pad | OUT1,GND2,GND1,VCC1 | SMD-SOLDER-PAD-3X3MM_AXBRI | 4 |
| 7 | LM2576SX-ADJ | U2,U1 | TO-263-5 | 2 |
| 8 | 0.33R | R8,R2,R1,R7 | R2512 | 4 |
| 9 | SSB44-E3/52T | D4,D1,D2,D3 | SMB_L4.6-W3.6-LS5.3-R-RD | 4 |
| 10 | 22uH | L2,L4 | IND-SMD_L10.8-W10.0_SLO1040H | 2 |
| 11 | 100uH | L1,L3 | IND-SMD_L13.5-W12.6_125CDMCC-DS | 2 |
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