Embedded_geek‭

I have a CAN circuit with two TCAN3414DR transceivers on the same PCB, each connected to a different MCU but sharing the same physical CAN bus. This bus then goes via harness to a BMS and a Slave c...

2 answers  ·  posted 10mo ago by Embedded_geek‭  ·  edited 6mo ago by Lundin‭

I have designed a two-stage power supply and control power circuit. The design allows the entire system to be powered and controlled using a single external push switch (when pressed, it is shorted...

1 answer  ·  posted 11mo ago by Embedded_geek‭  ·  last activity 11mo ago by Pete W‭

I’m using an N-channel MOSFET (SSM3K15AFU,LF) to drive a 5V RGB LED (Common Anode) that’s mounted off-board and connected via a 12-inch cable. The LED has an internal resistor and draws about 20 mA...

1 answer  ·  posted 11mo ago by Embedded_geek‭  ·  last activity 11mo ago by Nick Alexeev‭

I’m working on a throttle interface circuit for a BLDC motor controller using an STM32 MCU, and I would like some suggestions for two things — 12 V sensing and hall sensor input protection. The th...

2 answers  ·  posted 11mo ago by Embedded_geek‭  ·  last activity 11mo ago by Olin Lathrop‭

From my earlier post Controllable Enable/Disable Buck converter circuit, I have updated the design and built it on a breadboard. It works as intended. Circuit Operation - Default: When the batt...

1 answer  ·  posted 12mo ago by Embedded_geek‭  ·  last activity 12mo ago by Lundin‭

I’m designing a power control front-end for a 48 V (60 V max) system using the LM5069 hot-swap controller. My goal is to implement a press-to-turn-on / MCU-latch-ON / MCU-kill-power sequence using ...

0 answers  ·  posted 9mo ago by Embedded_geek‭  ·  edited 9mo ago by Embedded_geek‭

I’m working on a 48 V (60 V max) BLDC logic board, and I’m using an LM5069 hot-swap controller for the logic board. I need to control the UVLO/EN pin so the user can turn the system ON using a mom...

0 answers  ·  posted 10mo ago by Embedded_geek‭  ·  closed as duplicate 9mo ago by Nick Alexeev‭

I’m running into a CAN bus termination issue in one of my designs and wanted to get some opinions on the best way to handle it. Setup I have a master controller made up of two PCBs connected in a...

2 answers  ·  posted 11mo ago by Embedded_geek‭  ·  last activity 11mo ago by Lundin‭

I’m designing a 48 V input protection / hot-swap stage using the LM5069 and would really appreciate a sanity check on my schematic and component choices. Application specs Input source: 48 V ...

2 answers  ·  posted 10mo ago by Embedded_geek‭  ·  last activity 10mo ago by Olin Lathrop‭

I need some help with grounding approach and the TVS diode connections. Chassis-GND <-> PCB-GND Bonding I am currently tying PCB GND to Chassis_GND using a 100 Ω resistor + 0.1 µF capacitor ...

1 answer  ·  posted 10mo ago by Embedded_geek‭  ·  last activity 10mo ago by Olin Lathrop‭

I am working on the motor controller interface board with a 48 V battery connected (58 V max), the board should remain OFF (no 12V should be generated) when battery is plugged-in, until the user ta...

2 answers  ·  posted 1y ago by Embedded_geek‭  ·  last activity 1y ago by Olin Lathrop‭

The circuit shown below is used on one of my PCBs to switch the VBAT supply for the RTC, ensuring timekeeping continues whenever the main supply (VCC) is unavailable. Circuit Operation Under ...

1 answer  ·  posted 12mo ago by Embedded_geek‭  ·  edited 11mo ago by Embedded_geek‭

This is VBAT switching circuit installed in one of my PCB for Timekeeping when VCC is not present. The switching circuit is working as expected - when VCC is present, the current flows from D3 t...

2 answers  ·  posted 12mo ago by Embedded_geek‭  ·  edited 12mo ago by Embedded_geek‭