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Fixing incorrect predefined XTAL (onboard crystal) frequency, that cause incorrect frequency of output PWM signal and rubbish charactersin debug terminal.

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Let's find out the ESP32 internal pull-up/pull-down resistance by measuring of the real resistance of the using ampermeter.

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This advice can significantly improve your components library for achieving better precision of mechanical sizes.

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Make board tracing more enjoyable and electrical schematics easy-to-read using net coloring, this feature is available in KiCad and Altium Designer.

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Using new reference designator styles (U1 -> U1501) with page numbers to improve readability and modularity of the schematic sheets.

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If you make a device with external RTC module this essay can help you to make simplest backup powering (reverse power) using coin cell battery.

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Simple way to make hardware revision (REV1, REV2, REV3) using only one ADC pin, that helps to easy identify board version using MCU firmware, which give a change to easy maintain all board revisions taking into account all the device schematic changes .

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The only possible and correctly working way to extract (export) .step model from the EasyEDA footprint.

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Load switches are used for power control of any loads, typically it's used to fully enable or disable power of integrated circuits (chips) to achieve low power consumption in sleep mode.

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Here is simplest high-side load switch on discrete components, that can be used instead of special ICs.

Firstly some work simulation in MicroCap and then real testing with board.

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Using slider – simple but powerful instrument for debugging and developing.

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Changing variable using manual typing.

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Changing variable using slider.

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There may be a need to restore an only one specific file from one of commit and don't touch everything else.

Here is small instruction how to to it using git bash.

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Small instruction of using STM32CubeMonitor to write (change) value to the variable (RAM address).

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This short article help you to easily handle footprints courtyard (outline) overlap (overlay) clearance violations in KiCad by writing custom rule exceptions for specific components, to get 100% clear DRC without registration and SMS ?.

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This short note will help you get rid of ERC violations easily and in the most right way ?.

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1 month ago

simone gasparella 🌡️ Get temperature from STM32 internal temperature sensor (simple library)

hi… thanks a lot… reading some comment from ST they suggest to...
6 months ago

Durai M Simple buzzer library for STM32 HAL

Im using passive buzzer, everything is ok but buzzer sound is very...
7 months ago

Tom 🌡️ Get temperature from STM32 internal temperature sensor (simple library)

Replying to my previous comment — it was the ADC Continuous...
8 months ago

Tom 🌡️ Get temperature from STM32 internal temperature sensor (simple library)

Great tutorial, however i am having some issues with the timer:>...
8 months ago

admin admin 💻 HS402 3.0 ANDROID STM32 Oscilloscope PCB and assembling

Next part is already available: https://refcircuit.com/articles/16...
1 year ago

Dr X 💻 HS402 3.0 ANDROID STM32 Oscilloscope PCB and assembling

Very good,.waiting for next part.
1 year ago
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