jtfoo 0 Report post Posted March 22, 2004 (edited) Your cabling are very neat, unlike mine. And the LEDS, they're blinding, how much you got for them? The 12-0-12 tranny should give better margins.... Edited March 22, 2004 by jtfoo Share this post Link to post Share on other sites
tropicalrips 0 Report post Posted March 22, 2004 thanks the ultra bright leds r $0.80 each, blue ones r $1.50 each Share this post Link to post Share on other sites
JTT 0 Report post Posted March 28, 2004 A very useful regulator for this sort of thing is the LM200. It's very easy to make a fully variable supply based on an 18v transformer which will cover 3 - 22v, and it's a doddle to add selectable current limiting: very useful if you want it to charge batteries in its spare time. The voltage range is limited by the 32v max with which the device may be fed, and the reduction in voltage on the unregulated side of the supply as load is applied. There are ways to increase this, but but it does lead to more complex circuitry. You can make a pos/neg supply using two LM200 and a twin gang pot for setting the outputs. It won't have auto balance tracking, but dual linear pots seem to track each other very well these days. JohnT Share this post Link to post Share on other sites
JTT 0 Report post Posted March 28, 2004 Oooops! The above device is L200, not LM200! JohnT Share this post Link to post Share on other sites
