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Tinker Thoughts Blog

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  • Hacking a Cuckoo Clock

    TTB #26: Hacking a Cuckoo Clock

    When a regular Cuckoo clock just is not exciting enough, adding an on demand remote button changes everything. In this project we built a two node wireless link using matched nRF24L01 plus PA plus LNA modules mounted on PTSolns NRF Shields. The transmitter detects a simple button press while the receiver drives a solid state relay that parallels the original clock button. A quick splice into the clock’s internal adjust switch lets the relay mimic a real press. The result is a fully wireless Cuckoo trigger that works from across the room and is surprisingly fun to use.

    TTB #26: Hacking a Cuckoo Clock

    When a regular Cuckoo clock just is not exciting enough, adding an on demand remote button changes everything. In this project we built a two node wireless link using matched nRF24L01 plus PA plus LNA modules mounted on PTSolns NRF Shields. The transmitter detects a simple button press while the receiver drives a solid state relay that parallels the original clock button. A quick splice into the clock’s internal adjust switch lets the relay mimic a real press. The result is a fully wireless Cuckoo trigger that works from across the room and is surprisingly fun to use.

  • Giving Life to an OLD Digit Display

    TTB #25: Giving Life to an OLD Digit Display

    If you tinker with electronics long enough, you eventually build a stash of random spare parts. In this post, I dig into components from my 25 year old collection and revive a single digit seven segment display that has not seen power in decades. After mapping each segment to GPIO pins on the Nano Flip, I programmed two simple display modes: a rotating chase pattern along the outer segments and a repeating counter from zero to nine. It is a fun reminder that even old salvaged parts can still shine with a little curiosity and a few lines of code.

    TTB #25: Giving Life to an OLD Digit Display

    If you tinker with electronics long enough, you eventually build a stash of random spare parts. In this post, I dig into components from my 25 year old collection and revive a single digit seven segment display that has not seen power in decades. After mapping each segment to GPIO pins on the Nano Flip, I programmed two simple display modes: a rotating chase pattern along the outer segments and a repeating counter from zero to nine. It is a fun reminder that even old salvaged parts can still shine with a little curiosity and a few lines of code.

  • Reversing the Polarity on LiPo Battery JST Connectors

    TTB #24: Reversing the Polarity on LiPo Battery JST Connectors

    The 2-Pin JST-PH 2.0 connector is found on many LiPo batteries used in hobby drones, RC cars and toys, and of course electrical boards and modules. These are handy little connectors, but there is one problem - the polarity convention. About half of the vendors connect the negative (black wire) on the left and the positive (red wire) on the right sides. The other half does it the other way around. This can be an issue if the board or electronics you want to plug the LiPo battery into has the reversed polarity convention. Plugging in the LiPo terminals backwards...

    TTB #24: Reversing the Polarity on LiPo Battery JST Connectors

    The 2-Pin JST-PH 2.0 connector is found on many LiPo batteries used in hobby drones, RC cars and toys, and of course electrical boards and modules. These are handy little connectors, but there is one problem - the polarity convention. About half of the vendors connect the negative (black wire) on the left and the positive (red wire) on the right sides. The other half does it the other way around. This can be an issue if the board or electronics you want to plug the LiPo battery into has the reversed polarity convention. Plugging in the LiPo terminals backwards...

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