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Opening a wall wart that has no screws ;)
- Thread starter starhawk
- Start date
Arcygenical
Fully [H]
- Joined
- Jun 10, 2005
- Messages
- 25,066
Im using one of those chinese supplies (albeit at 50w 12v) to power a constantly on 30w led for my herb garden. The led driver draws about 52w and its been going strong for about 6 months.
This Lambda supply is NEAT! It supplies both +5v and -5v. Must've come out of an amp or something...
Transformer has five inputs (!) (AC1, A, D, B, AC2) and a ground lug that goes to the laminations. Instructions are:
For 230v operation, wire A (little black wire) together with B (little white wire) to D.
For 120v operation, wire A to AC1 and B to AC2.
Here's how I *think* I'm supposed to wire it up --
AC1 - line / hot 120vac in
D - do not connect (this is for 230v if I'm reading them correctly...)
AC2 - neutral 120vac in
Lug - ground wire from 120vac plug
The Novatel chargers are blind chargers AFAIK, they just provide regulated power input and there's no sense line or resistor "tell me how much I can pull" setup or anything, near as I can tell. However, I'm wiring up a cable from a deceased Novatel charger to this thing, just in case they hid something in the USB Micro plug end... I'm wiring *that* like this:
+5v = red wire on cable
+0v = black wire on cable
-0v = do not connect
-5v = do not connect
All that sound right, or did I goof? I'm going to go ahead and wire it but I'll wait to test it till I hear from you guys. I don't want to explode this thing...
Transformer has five inputs (!) (AC1, A, D, B, AC2) and a ground lug that goes to the laminations. Instructions are:
For 230v operation, wire A (little black wire) together with B (little white wire) to D.
For 120v operation, wire A to AC1 and B to AC2.
Here's how I *think* I'm supposed to wire it up --
AC1 - line / hot 120vac in
D - do not connect (this is for 230v if I'm reading them correctly...)
AC2 - neutral 120vac in
Lug - ground wire from 120vac plug
The Novatel chargers are blind chargers AFAIK, they just provide regulated power input and there's no sense line or resistor "tell me how much I can pull" setup or anything, near as I can tell. However, I'm wiring up a cable from a deceased Novatel charger to this thing, just in case they hid something in the USB Micro plug end... I'm wiring *that* like this:
+5v = red wire on cable
+0v = black wire on cable
-0v = do not connect
-5v = do not connect
All that sound right, or did I goof? I'm going to go ahead and wire it but I'll wait to test it till I hear from you guys. I don't want to explode this thing...
Multimeter says no voltage output. A finger on the transformer windings gives a "buzzy" feeling if you know what I mean.
I'm going to contact the seller and see how useful they can be. (Probably not at all, because of frivolous lawsuits all over the damn place.)
I'm going to contact the seller and see how useful they can be. (Probably not at all, because of frivolous lawsuits all over the damn place.)
Forgot to do a final update to this -- the Lambda has been humming along for most of a week now, just fine. The seller wasn't much help, but Lambda (now part of TDK) was.
I unfortunately can't post the datasheet, because Lambda made me sign a form... but here's the wiring information for 120v.
AC1 to A and to the black (hot or line) AC input wire.
AC2 to B and to the white (neutral) AC input wire.
Leave D alone.
Ground Lug (side of transformer) to the green (ground) AC input wire.
+5V and +5S should be connected together and wired to the positive voltage input on whatever you want to power (red wire, usually).
-5V and -5S should be connected together and wired to the ground input on whatever you want to power (almost always a black wire).
Leave +0V and -0V alone *unless* you have a Lambda "Optional Over-Voltage Protector" module which connects to those two outputs.
That's it!
Obviously, if you fry something doing this you shouldn't sue me OR Lambda. YOU fried it. Sue yourself
I unfortunately can't post the datasheet, because Lambda made me sign a form... but here's the wiring information for 120v.
AC1 to A and to the black (hot or line) AC input wire.
AC2 to B and to the white (neutral) AC input wire.
Leave D alone.
Ground Lug (side of transformer) to the green (ground) AC input wire.
+5V and +5S should be connected together and wired to the positive voltage input on whatever you want to power (red wire, usually).
-5V and -5S should be connected together and wired to the ground input on whatever you want to power (almost always a black wire).
Leave +0V and -0V alone *unless* you have a Lambda "Optional Over-Voltage Protector" module which connects to those two outputs.
That's it!
Obviously, if you fry something doing this you shouldn't sue me OR Lambda. YOU fried it. Sue yourself