[GreenKeys] Loop Supplies (was: any missing USB-tty adapter orders?)

[Paul Birkel]

Cory:  What values/wattage did you select for your power resistor and
adjustable rheostat?

 

From: GreenKeys [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Cory
Heisterkamp
Sent: Tuesday, May 17, 2016 6:38 PM
To: Greenkeys BOARD
Subject: Re: [GreenKeys] any missing USB-tty adapter orders?

 

Back in 2013 I decided I'd raid the parts stash for a power resistor and
adjustable rheostat, then ordered a Hammond plastic project box and 1/4"
insulated jacks off ebay <$10. Grabbed a mA meter there as well ($3.95) and
ordered transformer 237-1270-ND from Digikey for $9.95. It may not have the
efficiency of a modern design but it's served me well since then. Assembly
time was less than an hour including drilling. I say go for it Ed!  -Cory 

 

 



 

On May 17, 2016, at 4:36 PM, Ed Sharpe Archivist for SMECC via GreenKeys
wrote:





what  we  need  now is the    one  board   60 mil  voltage  source  small
and cheap! assembled...

 

seriously will all the stuff I need to do ion a  days and nights  time I
really  do not have    that much   time to build  things,....

 

Eric's  boards  were an answer  to a long uttered  prayer!  

 

the  next thing that  would  be  cool is one with wireless network interface
on it    and  sms?     well maybe  at  least the  wireless network.

 

for  80 percent  of what  I am  doing these   usb boards  with the    push
button to type message  fill the  bill.

 

 

 

 

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