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A schematic for Long and short press button with out Microprocessor
Zubi , 10-01-2024, 06:12 PM
Hello please could any please share with me a schematic diagram for on press and short press button only by using button Chip. If you have a reference it will do. So no MCU in the design only the button chip
QDrives , 10-01-2024, 08:48 PM
Why no MCU?
hydrogenate , 10-02-2024, 03:58 AM
sounds like an interview take-home design question
Zubi , 10-02-2024, 08:18 AM
hahaha it is not an interview.It is a project that need fast result :). So there is no GPIO pin space left in the MCU. The MCU is a STM32 F serries. With only a press the device comes on normally putting a low on boot 0 pin but with 3 seconds hold press on the button, the device goes into DFU boot mode. by putting boot 0 pin high so the device comes on to a DFU. I know I need a kind of chip for this kind of button press but I need more information and schematic to design a functioning circuit. Thanks 🙂
QDrives , 10-02-2024, 07:31 PM
Chip or discretes?How reliable?
Electric Prophet , 10-02-2024, 10:19 PM
If you have an ADC available on the MCU you could use a capacitor charging circuit attached to the button, by picking a threshold voltage for the ADC and calculating the capacitor charge time
Zubi , 10-03-2024, 10:08 PM
Ok, Thanks
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