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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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Verified Purchase | |
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| eBay | ||
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Verified Purchase | |
| Good | ||
| ebay | ||
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Inexpensive, simple to connect, works fine | |
| As the previous reviewer states, its got an active high output, so youll need some transistors and resistors to reverse, and it isnt the most secure device, but its cheap, easy to interface, and its probably going to last years. Definately worth the paid price. | ||
| Chuck | ||
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Works as expected | |
| These arent terribly secure. They offer 3^8 possible codes, about 6500, or Id give them a higher score. But they are easy to use. My garage door opener radio went out, and Im using one of these until I get it fixed. I had to extend the antenna on the transmitter to get it to work more than 25 feet or so from the receiver, havent tried to determine the maximum range. Frequency was measured as around 312MHz on one transmitter and 313MHz on another but both worked with the same receiver, so the receivers are pretty wide. Use a fine-point soldering iron to set the code if you decide to change from the default, but its not hard. I needed the outputs to be active-low for a relay board. So I hooked the active-high outputs up to some NPN transistor bases through 4.7K resistors. The Valid output is connected to a transistor in series with all the others, its emitter to ground, its collector is the ground for the others, so the Valid must be high before the others are trusted -- just in case the outputs ever produce false positives on noise. Thats something Ive seen with other similar chips, not sure it its necessary but it was easy. Then one per other output, with the collectors having a 4.7K pullup to +5 and a connection to my relay board inputs. Works like a champ, ordering a few more as spares. | ||
| - Steve, FL | ||
