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WARNING: This product can expose you to chemicals including Nickel which is known to the State of California to cause cancer and which is known to the State of California to cause birth defects and/or other reproductive harm. For more information, go to www.P65Warnings.ca.gov Click to see Why is this here?
As of August 2018 the State of California has changed the requirements of the Prop 65 law. We now must list on our website any possible chemicals the can cause cancer, birth defects or reproductive problem.
As an example: ABS plastic contains styrene PVC wire insulation can contain Di(2-ethylhexyl)phthalate (DEHP) electrolytic capacitors can contain Ethylene glycol Brass can contain Lead flame retardant pc boards can contain Tetrabromobisphenol A (TBBPA) Aluminum alloys can contain Chromium To put it simply we are a small company and do not have the resources to test every single part, so we list every thing as hazardous. Please recycle all electronic parts responsibly and under no circumstance eat, drink or smoke these parts and wash your hands after touching! |
Product Reviews Click here to review this item | ||
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Time saver | |
| Have built many regulators over the years, very nice to have an off the shelf option. Works well with one problem, the connectors. These term blocks are ubiquitous on Asian sourced electronics and many, such as these, are absolute junk. One input screw on mine froze in place after one use, only option was to desolder entire block and direct wire. A design limitation which one reviewer came up against dropping 24 down to 10 volts was the heatsink. At current draw a 14 volt drop would dissipate just shy of 1/2 watt. That will indeed cause the module to get hot, but not to point of auto shutdown. I stripped the old heatsink, added a silicon pad insulator and larger sink and it happily runs 1.5 amps at 10 volt drop. Yes, it gets hot, you cannot beat laws of physics. In any case as many EE gurus have advised over the years - read and understand the datasheet. | ||
| - John, FL | ||
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Great device for the money, but it overheats with low current draw | |
| I build electrical training equipment and I have purchased over 100 of these units. So far, I have only found 1 bad one out of several dozen used so far. My problem with them is that I have a circuit with two other modules in it also bought here that are connected to the regulator module. They draw less than 15mA each, but the regulator gets hot during operation. I went from 24V from a switching supply down to 10V for the modules. The LM317 should be capable of 1A, so I am not sure why the module is getting hot. I tried several other modules and the problem is the same. I was hoping that I would not need a fan on that piece of equipment I built, but being in an enclosure, I will definitely need to do it. If anyone knows why this is happening, please let me know. The switching PS should not be causing the issue, IMO. Ill try putting on a filter capacitor to see if that helps. | ||
| - Sean C, CA | ||
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Verified Purchase | |
| Great Product Fast service A+++ | ||
| eBay | ||
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OK device | |
| This is a good little regulator if you dont need a very low output voltage. I used one to replace a AA battery and set it to 1.5v and it worked for about 10 minutes and then failed. I thought it was just that one but a second unit failed in the same way. Seems like the scaling resistors are wrong and when using for a low output the pot heats up and fails. | ||
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Almost wonderful but great for the price. | |
| I bought 5 of these because it would take many $$$ more to build them. One of the 5 proved to be defective when I tested them, the 317 shorted out. Ill probably just replace it with an LM350. They should have used about 350 ohms for R1 because the 200 ohms wastes much of the pots range. The pot should be mounted 180 degrees from the way it is. That way CW rotation will increase output voltage AND it would keep the heat sink from interfering with captive adjustment tools. So I would give future production units 5 stars if they bumped up R1 to around 350 ohms and reversed the pot mounting. The mfg. costs should be the same. Basing it on the LM350 would make the same board even better. | ||
| - Joe Stanko, IL | ||
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Good little supply | |
| Can be a little tricky to get exactly the voltage you want, but they do a great job for the price. I use a ton of these for Arduino, lasers and video. They are great for POE. | ||
| - Rick Jensen, FL | ||
