diff --git a/notebooks/ritvik/PD_V_LDO.jpg b/notebooks/ritvik/PD_V_LDO.jpg new file mode 100644 index 0000000000000000000000000000000000000000..baac479ddb260b84426a3c291b7b265814d4f72c Binary files /dev/null and b/notebooks/ritvik/PD_V_LDO.jpg differ diff --git a/notebooks/ritvik/PD_V_Switching.jpg b/notebooks/ritvik/PD_V_Switching.jpg new file mode 100644 index 0000000000000000000000000000000000000000..02c3283c00cd6e5032e0cecbb13643c7e3fc6b85 Binary files /dev/null and b/notebooks/ritvik/PD_V_Switching.jpg differ diff --git a/notebooks/ritvik/README.md b/notebooks/ritvik/README.md index 97b6d1d20771dd65da61ea9085be9527d451c852..55ee2c1a815339e635b9940e37392a08f0e47fd0 100644 --- a/notebooks/ritvik/README.md +++ b/notebooks/ritvik/README.md @@ -137,7 +137,7 @@ Most of this time was spent redesiging the layout of the board with a new ESP32 The board layout was simplified to only two layers.  - + # 03/28/2022 - Signal Processing @@ -152,5 +152,22 @@ The PCB can be printed using PLA on a 3D printer. # 04/14/2022 - Soldering I soldered the switching regulator on PCB. +When I tried to verify the output of the regulator solution, the output voltage read to be 1.8V. After debugging for a bit, I realized the issue was due to the fact that the IC we had was the 1.8V variant but we designed for the 3.3V variant. + + + +# 04/15/2022 - Soldering +I soldered the LDO and was able to verify a regulated 3.3V on the power line. + + +Soldered the ESP32 on board but I could not verify functionality of the ESP32. + + +# 04/16/2022 - Soldering +I verified that the ESP32 can go into boot mode. Most of today was spend soldering the data aq. components. + +# 04/18/2022 - UART Flashing Issue +We expereienced issues flashing the ESP32. I followed standard ESP32 procedure with the proper strapping pins jumped. I noticed the enable line was getting pulled low and back high implying the ESP32 was constantly rebooting. -Additionally I tried to verify the output of the regulator solution. \ No newline at end of file +# 04/20/2022 - Replaced ESP32 Module +The unusual behavior by the ESP32 was fixed by replacing the old module with a new one. I attribute the cause of the malfunctioning ESP32 to some solder paste getting under the module and shorting the enable pin with the power rail. \ No newline at end of file diff --git a/notebooks/ritvik/Soldered_ESP32.jpg b/notebooks/ritvik/Soldered_ESP32.jpg new file mode 100644 index 0000000000000000000000000000000000000000..e9cd616517bf6fcf6074abb92b80c921811a57ad Binary files /dev/null and b/notebooks/ritvik/Soldered_ESP32.jpg differ