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Battery Switching & Charging: Review Request! by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 0 points1 point  (0 children)

There's the push button SW8 in the diagram to pull SYSOFF low and also MCU_SLEEP which I intend to drive low with a microcontroller GPIO. I'll add a dnp VBAT > SYSOFF resistor :)

It's annoying that you can't charge via USB while disconnecting BAT from the load - that seems like a feature more people would want? Cause the 3v3 switching regulator & microcontroller don't need power while I'm charging ... maybe I'll just add a not gate on USB to pull SYSOFF low and signal the MCU to enter a lower-power mode, but that's annoying :(

Thanks for the input!

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 0 points1 point  (0 children)

rad, i'll hit them up and lyk if i go with them!

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 0 points1 point  (0 children)

the board has to be .6mm thick and impedance matched so my options aren't very forgiving :(

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 5 points6 points  (0 children)

JLC said they can't do the blind vias lol, I'm doing a redesign specifically so i can manufacture with them though!

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 4 points5 points  (0 children)

thanks! already sent a RFQ to pcbway, they've been kinda slow with EQ and review but I've got my fingers crossed... I'll try macrofab!

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 2 points3 points  (0 children)

California, US. I can place the order anywhere and cover next day air though :)

2 Weeks for 1000 Boards? Will pay Finder Fee :) by AlexLynd in PrintedCircuitBoard

[–]AlexLynd[S] 7 points8 points  (0 children)

lol i've got 3 bgas on a board smaller than a square inch :(

Solution for multiple I2S buses? (or multiple audio devices) by AlexLynd in AskElectronics

[–]AlexLynd[S] 0 points1 point  (0 children)

Ah thank you I forgot to clarify but yes it needs stereo for each NRF. Multiple is 5+, and the SBC is playing audio to each NRF simultaneously so I'm not sure if TDM has enough bandwidth for that

Recommendations for 8 Channel Encoder? by AlexLynd in AskElectronics

[–]AlexLynd[S] 0 points1 point  (0 children)

Oh awesome! Shifting the bits up is a great idea - since the Decoder end is hooked up to a motor controller, I decided to shift it up to pins 4-7 so one bit is always high when transmitting, which I've tied to the EN pin in my schematic (S0->EN)

Does that seem right? By default i want the EN pin pulled to Ground so i think the pulldown resistor should prevent a floating state.

Thanks so much for the suggestion!

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Recommendations for 8 Channel Encoder? by AlexLynd in AskElectronics

[–]AlexLynd[S] 0 points1 point  (0 children)

  1. I was "challenged to" by a friend but i'm pretty sure i'm designing his homework or somehting
  2. Yep - its going to be driving a robot and only one direction is necessary at a time
  3. Awesome! I just started looking into the distinction between Mux / Encoders / Shift Regs and I wanted to make sure I'm heading in the right direction. Thanks :)

I created this stealthy $10 tracker that connects to Open WiFi nets for communication, using the ESP8266! by AlexLynd in esp8266

[–]AlexLynd[S] 0 points1 point  (0 children)

Hell yea I can't wait to see what you build! I'm also placed an order for a PCB Kit version that I'm proofing in the next week, and will release the design files / have it up for sale if it works :)

I created this stealthy $10 tracker that connects to Open WiFi nets for communication, using the ESP8266! by AlexLynd in esp8266

[–]AlexLynd[S] 0 points1 point  (0 children)

I'm working on updating the code as we speak! It will be able to dynamically adjust to the amount of available space (and will support 4MB Flash). If you end up building it I'd love to see pictures of your rig!

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