![]() ![]() LEDs for the second and third speed segments are driven similarly (Waveform 2). To drive green on, the output is driven high and then switched to an input (or Hi-Z state), so that lower voltage ends up somewhere between battery voltage and supply voltage. Since the same pin is also used as an ADC input, the battery voltage could be sampled at that stage. The most obvious optimization was done by grouping things together- lower LED is always on with the motor- might as well drive them at once. The red/green signal (Waveform 3) is more involved- to drive red the microcontroller switches to open drain mode and only pulls down, generating pulses between Vbat and 0 V. The razor uses 4 green and 1 red LEDs, but PIC10 here only has 3 pins available for all of them. It gets a bit more interesting with the LED multiplexing. Speed is adjusted by varying duty cycle of the PWM signal (It goes in steps of 40%, 60% and 97%). The motor is powered directly from the battery voltage and is controlled via an NPN transistor. This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen.The design is somewhat predictable- we have a 3V boost power supply feeding the PIC microcontroller. YouTube sets this cookie to store the video preferences of the user using embedded YouTube video. YSC cookie is set by Youtube and is used to track the views of embedded videos on Youtube pages. The test_cookie is set by and is used to determine if the user's browser supports cookies.Ī cookie set by YouTube to measure bandwidth that determines whether the user gets the new or old player interface. Google DoubleClick IDE cookies are used to store information about how the user uses the website to present them with relevant ads and according to the user profile. This information is used on the website, in order to optimize the relevance of advertisement. This is a Pinterest cookie that collects information on visitor behaviour on multiple websites. These cookies track visitors across websites and collect information to provide customized ads. It does not store any personal data.Īdvertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. PayPal sets this cookie to make safe payments through PayPal. PayPal sets this cookie to enable secure transactions through PayPal. It works only in coordination with the primary cookie. Records the default button state of the corresponding category & the status of CCPA. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". Set by the GDPR Cookie Consent plugin, this cookie is used to record the user consent for the cookies in the "Advertisement" category. This cookie is set by the Google recaptcha service to identify bots to protect the website against malicious spam attacks. These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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