PDA

View Full Version : PWM controller found on DX cheap



Evan
09-12-2012, 04:46 PM
The way this item is labelled on Deal Extreme it isn't that likely to be found. It's a PWM speed controller for a 12 to 40 volt DC motor or other load up to 400 watts. It is labelled on the board for "motor" so there is no doubt about that. At $17.10 it is a pretty good deal for controlling DC lead screw motors and similar items. DX doesn't charge any shipping and they are reliable in my experience. I have bought many items and the quality is generally acceptable. When something is iffy they usually say so.

http://www.dealextreme.com/p/dc-dynamo-governor-pump-pwm-12-40v-150188

No connection other than usually satisfied customer. The only items I have had any trouble with from them are very cheap LED light bulbs. You get what you pay for. For some unknown reason I have never been charged duty or taxes on anything that comes from them. YMMV.

They also now are carrying a very wide variety of Arduino parts and accessories as well as a wide range of electronics parts.

There is a 2 kilowatt (25 amps) lamp dimmer for only $7.90 which is a much higher rating than usual and it will run on 90 to 220 VAC. That is enough to regulate a small heat treat furnace or kiln.

http://www.dealextreme.com/p/2000w-adjustable-90-220v-voltage-regulator-for-dimming-light-lamps-speed-control-220v-150120

They also have a wide variety of E-Stop switches as well as many types of membrane and tactile switches. In a lot of cases the prices are what you would pay at Radio Shack for just one but you get a package of 20 or 50. Look in the Electronic DIY Parts and Components:

http://www.dealextreme.com/c/diy-parts-components-410?page=1&pagesize=52&pagesort=relevance

I'm ordering some items including some SMD LEDs to fix a 21.5" monitor with a burned out fluorescent backlight. Acer won't even talk to me about ordering a replacement bulb. Goodbye Acer.

I then found DX has pretty decent household faucets of many types with all of them either solid brass or even chromed copper. Those are about 1/4 or less the price for the same thing here. With prices like that I can't afford to buy local especially when the local plumbing supplies are selling junk plastic fixtures for more than DX charges for the real item.

This hobby is too expensive to pass up good deals no matter where they are found. Buying direct beats paying several middlemen and I especially like avoiding duty and taxes, legally.

macona
09-12-2012, 05:03 PM
There isnt a LCD monitor manufacturer that will sell you just the lamp. As far as they are concerned the LCD panel is a monolithic part. Even when you send in a monitor for warranty repair they just send you a new one and scrap the old one. Thats how I got my two 24" lacie monitors. Took three warranty returns that were sold for scrap and build two working displays.

There are several companies out there that sell backlight tubes for most LCD displays. Just put in the part number of the panel itself, not the model of the monitor, and it will tell you the length and diameter. I have bought a couple lamps for a touchscreen monitor I have in the past.

MaxHeadRoom
09-12-2012, 05:23 PM
It is usually either the CCFL lamp or the invertor, I have got both either from DigiKey or the Manuf direct.
Max.

mickeyf
09-13-2012, 09:22 PM
This:

http://www.ebay.com/itm/280910683946?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

Looks suspiciously like the identical controller, for $10 less. If you don't mind waiting for a few weeks, eBay Far-East generally has everything you'll find closer to home - if fact that's almost certainly where it comes form anyway.

Just sayin'.

Evan
09-13-2012, 10:03 PM
Looks the same to me. What do you mean by "eBay Far-East"? e-Bay doesn't work the same here as it does in the US. On DX you should also look at the prices for the recently opened US Warehouse.