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I am currently in the process of building a circuit board for components that I am going to use on a lathe. I want to use this tachometer.

https://www.amazon.com/dp/B00VKAT8A2/ref=cm_sw_r_sms_c_api_47YOBbE8R9GFR

I have checked out the manufacturer website but it’s not in English. So I was wondering how I could find out the forward voltage on it, if I ordered it. I’d also like to State I would like to avoid a handheld tach if at all possible. Thanks for all the response in advance.

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  • \$\begingroup\$ I have checked out the manufacturer website .... what might that be? \$\endgroup\$ – jsotola Sep 25 '18 at 0:54
  • \$\begingroup\$ I would like to avoid a handheld tach .... what does this mean? \$\endgroup\$ – jsotola Sep 25 '18 at 0:54
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I'm not sure what you mean by "forward voltage". That's a term usually used to describe the voltage drop over diodes.

The device you linked appears to be an all-in-one solution. You'll just need to power it using a wall wart between 8 and 15v. Anything > 300ma should be fine.

Here's a wiring diagram one of the reviewers made:

Wiring diagram

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