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9 volt battery amperage (mAh)?

2207 Views 14 Replies 6 Participants Last post by  craigsrobotics
Ok, this is driving me nuts....I am in need of a "9 volt battery eliminator/adapter" to power a set of LED eyes controlled by a color changing / fading circuit...here's my dilemma - When the unit is powered by a 9 Volt battery, it works fine...BUT, when I try different 9 volt adapters (i.e. each having a different milliamp / amp rating), I get nothing, not even a flicker....so my question is, obviously this circuit requires exactly a 9 Volt battery to power itself (and must have some protection as to not get overpowered or underpowered), therefore, can anyone tell me what the mAH / amp rating is of a standard alkaline 9 Volt battery, so I can size an AC/DC adapter to use in its place? It sucks to all "royal hehaw" to have to keep replacing batteries for something so trivial....Ahhhgg....:eek:
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That seems too weird. Battery output fades over time, and it wouldn't make sense to have to replace the battery when it gets down to like 8.5 volts. I know you've already checked, but do you have the polarity correct on the wall adapter? Even if the adapter isn't an exact match for a battery, you should be getting some response.
 

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Craig, I found a number for TBD - you could try calling and ask what's up with the circuit. The number is 630-830-9561. I also found this email: [email protected], but don't know if either of these contacts are still valid.
The only other thing I can think of is that the battery puts out a pretty steady voltage, and if you're using a non-regulated supply it may make a difference.
 

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Actually, I called Sue (Denny's wife) once to see if I could get a copy of the instructions for my UDT II IR controller, and she kindly faxed me a copy. I think they're still trying to support their customers in whatever way they can. If you really get stuck, you could try calling and see if they can offer some advice.
 

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One other thing - I've found that sockets and plugs are not universal in size (but you knew that). I had a problem getting a good connection on a socket recently, and found that if I bent the center pin in the socket slightly to one side, I got a solid connection. The barrel of the plug was too large to contact the pin. This might be why you're getting no response at all from the LED board.
 
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