diff --git a/README.md b/README.md index 079a360911525363fc2b5822d49b66f38e2f5df8..63607261bd4a5ad8ca34b4c6dc02bea32fdb2322 100644 --- a/README.md +++ b/README.md @@ -139,7 +139,7 @@ Hint. Never, never ever, change the grid settings when placing the pins in the s ### 11) 1.9v Power Supply -As you see in the PWM3389DM-T3QU datasheet and reference schematics, the sensor requires a 1.9v power supply. This is much less common voltage (try finding one from Elfa or rs-online) and you will likely fail. +As you can see in the PWM3389DM-T3QU datasheet and reference schematics, the sensor requires a 1.9v power supply. This is much less common voltage for a fixed output LDO (try finding one from Elfa or rs-online and you will likely fail). To that end, you can use an adjustable voltage regulator, such as [MIC5235YM5-TR](https://www.elfa.se/en/ldo-voltage-regulator-24-20v-sot-23-microchip-mic5235ym5-tr/p/30099685), which will let you set your desired output voltage using external resistors. @@ -185,8 +185,7 @@ It is very important that the pin numbering on your component is correct to the - Annotate all the components, this will give your components a name. - Click on the ”Assign PCB footprints to schematic symbols” to associate components and footprints”-button at the top. - Click on the View selected footprint button at the top, it will display the footprint in question. -- We recommend you to use 0805-size capacitors and resistors. Associate all the res. and ceramic caps. to 0805 respectively, Handsoldering. (Ca-pacitorsSMD and ResistorsSMD) -- The 10uF caps should have an electrolytic footprint. Search Elfa, rs-online first. If they don't have the components, check Farnellor digikey for appropriate size for the capacitor. +- We recommend you to use 0805-size capacitors and resistors. Associate all the res. and ceramic caps. to 0805 respectively, Handsoldering. (Capacitors SMD and Resistors SMD) - Read in the datasheet or on the link for the voltage regulator and select the correct footprint. Make sure that all components are in stock for immediate delivery. - Repeat for the crystal and SWD connector. - MCU = HousingsQFP:LQFP-6410x10mmPitch0.5mm.