Yeah, I noticed that, too. I was wondering "what can you do with 20ma ?" I
guess it's made for tripping an opt-ioslated switch or driving a transistor.
- Doug
-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Frank Pittelli
Sent: Tuesday, January 20, 2009 5:05 PM
To: [email protected]
Subject: [TANKS] Re: relays?
Doug Conn wrote:
> Pololu just released this R/C switch for $9.95/$8.95.
>
> http://www.pololu.com/catalog/product/752
Be careful. That circuit only sources/sinks 20ma, which is far less
current than required by most relay coils. Joe's (battle-tested)
circuit can sink 150ma of current. So, you'll have to add more
electronics to that circuit to compare the prices. You'll also need to
add your own cable.
Frank P.
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