This is the third version of the SilverLight 5vFPV. This has the XTAL moved right away from the inductor for the 5v power supply which was causing interference in the RX circuit in the original SilverLight 5vFPV design. I also addressed a number of other relatively minor design flaws / improvements like -

numbered the ESC connector end pins 1 & 6

moved the 5v socket away from the programming socket as they were too close

fixed the wrongly labeled ADC / VIN pads

moved the XTAL caps closer to the XTAL

fixed the XN297 footprint which was too wide

modified the DRC so that the vias are now tented (covered with solder mask)

Moved the ESC connector over and added two VIN pads. I do not like putting up to 4S in through the tiny VCC and GND pins of the ESC connector especially if there is an FPV camera/ VTX also being used as well as power for the FC"

PDF of schematic available here - https://www.dropbox.com/s/59v4sqlvpaxhhz2/SilverLight%20FPV%205v.pdf?dl=0

BOM available here - https://docs.google.com/spreadsheets/d/1oSa94LWQMyIAyTTWv7rmzk9OhKeJjQdVcmoxLCC_LGM/edit?usp=sharing

740011A breakout for TI package 10 pins with “DGS” code

740007A SOT23-6 breakout in DIP18 footprint. At least I think it’s a DIP footprint. I used it on a breadboard a long time ago and don’t remember.

final

Eastbots DIO tester/breakout board, 2019 season revision.

based on previous diobd design: Tester and breakout for FRC and similar digital I/O. The 3-pin 1x3 headers each carry Ground, +5v, and Signal, in that order. Build it as a tester, with male and female horizontal socket and header strips. Or omit the male headers, and directly solder in the wires from a limit switch or break-beam sensor. Designed by FRC team 4795.

this rev add silkscreen identifying the three signal pins, and some #2 mounting holes. Silk on the back identifies this as being designed (and potentially fabricated) during the 2019 FRC season.

Supplemental board for sPWM v3.

What you need: -Omron B3SL-1002P or similar tac switch or external switch of your choice -11 male pin headers, 2.54mm pitch -Model 93 pot (for onboard use) or 2 switches of your choice for the pot wiring -LED or 3-wire VM -6mm Standoffs -screws of appropriate size (i.e. M1.6) -sPWM v3

The sPWM is sandwiched between this PCB and the enclosure wall, with the mosfet facing the enclosure. Board has a cutout to solder the power wires directly to the sPWM.

https://www.youtube.com/watch?v=EZUZa_myApU&index=3&list=PLUMG8JNssPPzKeYkrDJpXV0J0Eu5myQqi

https://www.youtube.com/watch?v=EZUZa_myApU&index=3&list=PLUMG8JNssPPzKeYkrDJpXV0J0Eu5myQqi

TPS63020 based buck-boost LED driver in 17mm / 4 layers, with 1.27mm ISP pogo header on bottom side for in-flashlight programming.

Bill of Materials (BOM)

U1 TPS63020DSJR
U2 ATTINY13A-MMU
U3 INA190A1IRSWR [1]
U4 TLV70025DCKR [2]
C1 100nF 0402
C2 22uF 16V 0805
C3 1uF 0402
C4 47uF 25V 1206
C5 1nF 0402
C6 1uF 0402
C7 1uF 0402
R2 13mOhm 1206 [3]
R3 6.8K 0402
R4 4.7K 0402
R5 19.1K 0402

1) Make sure to get the A1 version, as others have different gain which changes the power output.
2) Any 2-3V LDO should do.
3) Current sense resistor, 13mOhm is for about 1.5A out.

Rsense = 0.5V / (Iout * gain) = 0.5V / (Iout * 25)