I made a useless machine with a twist. 
This - one - hertz itself.
NE555 timer + counterfeit LM358 opamp + full bridge rectifier diodes + photo interrupter + DC motor = 60 bpm spinning disk
Add a spinning drill bit and we are in for a world of 1 Hertz
This is my entry in the Hackaday One Hertz Contest: 
<a href="https://hackaday.io/project/203810-hardwired-to-destroy-itself" target="_blank" rel="noopener noreferrer">https://hackaday.io/project/203810-hardwired-to-destroy-itself</a>

I made a useless machine with a twist. This - one - hertz itself. NE555 timer + counterfeit LM358 opamp + full bridge rectifier diodes + photo interrupter + DC motor = 60 bpm spinning disk Add a spinning drill bit and we are in for a world of 1 Hertz This is my entry in the Hackaday One Hertz Contest: https://hackaday.io/project/203810-hardwired-to-destroy-itself

I made a useless machine with a twist. 
This - one - hertz itself.
NE555 timer + counterfeit LM358 opamp + full bridge rectifier diodes + photo interrupter + DC motor = 60 bpm spinning disk
Add a spinning drill bit and we are in for a world of 1 Hertz
This is my entry in the Hackaday One Hertz Contest: 
<a href="https://hackaday.io/project/203810-hardwired-to-destroy-itself" rel="noopener noreferrer">https://hackaday.io/project/203810-hardwired-to-destroy-itself</a>

Useless Machine - This 1 Hertz Itself

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Useless Machine - This 1 Hertz Itself

Useless Machine - This 1 Hertz Itself