[GreenKeys] 87.6 tuning forks available on ebay

[Ralph Mowery]

With all the inexpensive stuff coming out of China it is hard to build
anything as inexpensive.

You may want to look at one of the Arduino boards for that strobe project.
They make one  IC that has about 8 pins on it and should be easy to build
your strobe using it and programmed for the frequency you want.  Might be
even better to use one of the 'free' lights from HF that seem to be the only
free thing in months.
Remove the multi lights and just use the one on the end.

Ralph ku4pt



-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Mark J. Blair
Sent: Sunday, February 23, 2020 12:50 PM
To: GreenKeys Mailing List
Subject: Re: [GreenKeys] 87.6 tuning forks available on ebay


On 2/23/20 3:30 AM, Dave Wade wrote:
> I found that setting the speed on my creeds with them was
> "challenging" but with something similar to this:-
> 
> https://www.ebay.com/itm/312876419315


One of my unfinished projects has been to convert a cheap little Harbor
Freight LED flashlight into a fixed-frequency strobe light for setting the
speed on my Kleinschmidt machines. One of these days, I should finish that.
I have a long history of half-finishing project designs and then getting
distracted by a new squirrel.

The general idea was to replace the 3-cell AAA holder with a CR123 cell, and
sandwich a little PCB between the CR123 and the LED head. The PCB would have
a little microcontroller on it which would flash the LED head at the desired
frequency. Some 3D-printed or machined parts would keep things from rattling
around.

-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/