Re: Reverse polarity diode circuit

Trent Trent <vk7hrs@...>
 

Put a alarm in the case with a diode so if the polarity is wrong it will annoy the crap out of you and everyone else near you 

On 11 Dec. 2017 2:26 pm, "Vince Vielhaber" <vev@...> wrote:

The better news, you can get them all day long from Tayda for 16 cents each. But they only have 119,418 of them in stock.   To the US, shipping from Tayda is only a week for their slow boat shipping. Tayda's minimum order is $5, so for another $3 and change you can get that replacement nano!

Vince.



On 12/10/2017 02:48 PM, Jack Purdum via Groups.Io wrote:
All:

The good news: I just ordered a mega-munch of 3A, 30V polyfuses that I'd
be happy to share for $1, including domestic shipping.
The bad news: They're coming from China, so will likely be several
weeks. I'll make a post here after they've arrived.

Jack, W8TEE


------------------------------------------------------------------------
*From:* Jerry Gaffke via Groups.Io <jgaffke=yahoo.com@groups.io>
*To:* BITX20@groups.io
*Sent:* Sunday, December 10, 2017 2:24 PM
*Subject:* Re: [BITX20] Reverse polarity diode circuit

Yup, a Polyfuse works great.
Can add a resistor and red LED across it as an idiot light so you know
when to  execute the dope-slap.
(Can also do that for a fuse)

Though Farhan is looking for stuff that's easy to scrounge, doubt a
Polyfuse will make it into the next rev.
A small diode for both reverse protection and overcurrent protection on
the main rig might be the best bet.

Jerry, KE7ER


On Sun, Dec 10, 2017 at 11:16 am, Don Cantrell wrote:

    My favorite is the Polyfuse.





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