Quote:
Originally Posted by Alan Anderson
Where did you find this information? It's totally wrong.
Spike relay modules contain a pair of simple physical relays that use a pair of logic level signals to independently switch each relay's output between the 12 volt power and "ground" return inputs. When wired to motors, both relays are usually connected in an H-bridge configuration, but they don't have to be used that way. They are just as easily used as separate circuits, such as when powering LEDs or pneumatic solenoid valves.
Pulsing them is not recommended, as they are rated for a finite number of cycles and are likely to fail either electrically or mechanically.
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Quote:
Originally Posted by billbo911
I'd be really careful using Wikipedia.org as an authoritative document source.
The example you gave is a perfect example as why caution should be used.
As far as I know, they have always been mechanical contact relays.
You can find some Technical Specs on this page. |
Fair enough I provided the other link previously.
http://www.chiefdelphi.com/forums/sh...2&postcount=13
The term H-bridge shouldn't even apply to this unit anyway.
An H-bridge is a very specific circuit.
http://en.wikipedia.org/wiki/H-Bridge
This is at best a half bridge or half h-bridge.
I suppose if this were transistors you could also see it referred to as a totem pole, push-pull or class AB amplifier configuration.
However, to keep this on topic as I stand corrected on the details:
http://www.youtube.com/watch?v=LL2Sryi57xA
A solid state relay *can* be used to control motor speed under the right circumstances and Innovation FIRST does sell one (I've just never tried it with this relay and we don't know what kind of motor):
http://www.ifirobotics.com/ssr.shtml