Best Diode Lasers
1X 2.5W Focusable Blue Laser Module. 1X Power Adapter.
Reviews
Find Best Price at Amazon"My unit draws 1.21 amperes at 12 volts, with an ambient temperature of 73 degrees F. At that rate, the 2.5 ampere rated power supply that comes with the unit may be able to supply the Peltier junction in addition to the laser module."
"Bright, powerful, burns holes in things."
"Great Laser, powerful, so far reliable."
"When I opened it I was surprised at the build quality, I guess I was expecting a cheap thrown together knock off but got the complete opposite. When you focus this laser down to a pinpoint it is really amazing to see almost anything you point it at burst into flames or spew smoke as throw it were being boiled in a sense. I can't wait to order the larger more powerful unit here in a few weeks to start ethching aluminum with the flatbed cnc x/y table and get away from the deaktop engraver for plastics and wood."
"Im so glad I bought this for a project because this is totally the type of thing I would impulse buy to mess around with lasers."
"2 inches long [not including fan] and 1.2 inches tall this laser module is small - tested and it works fine - does not seem to heat up too quickly and it does burn things quickly - eye damage via reflected beam is almost instantaneous so a set of laser goggles are advisable - has threaded holes in the base for mounting - the power supply is a standard 12 volt 2.5 amp switching supply - good price would recommend.."
"This will not do anything to white plastic, but will burn dark plastic, wood and paper."
"Wow!"
10 X WYHP Mini Laser Dot Diode Module Head WL Red 650nm 6mm 5V 5mW Pack of 10.
Reviews
Find Best Price at Amazon"They produced a clear laser dot across a brightly lit room when powered at 4v and 19mA."
"I originally assumed they were shipped from China since the delivery estimate was over a month, but I was then surprised to find that they were delivered within a week!"
"All functioned as expected, tested each using a bench top power supply."
"The nice thing is they work directly off of 5 volts, so no current limiting resistors or voltage regulation is required when using them with most micro-controller projects."
"They run off of a 3v button battery, which is nice."
"Humm... For the money, one can't get much better, period."
"Minimal packing material but not a problem since 10 of 10 lasers worked perfectly when tested (these are really tough)."
"Very small but these put out an amazing amount of light with 4 1.5 volt CR coin cells."
Carving Material : wood type, some plastics, paper, bamboo, horn, thin leather (wallet), rubber stamp, photosensitive, Printing paper (material mainly used for carving, cutting can be relatively small), sponges, paper and so easy to burn Materials.
Reviews
Find Best Price at Amazon"Good quality for the price."
"Ran right out the box."
"This one produces a nice tight band between 393 nm and 432 nm with most of the energy being between 398 nm and 414 nm and NO OTHER wavelengths to screw up the works."
"In Fact this seems to have the same heatsink that the higher watt lasers are using. I highly recommend this laser if you are just getting into cnc on limited funds, or already have a cnc and want to throw a little laser on it."
"Bright, very very bright."
"This thing is fun to play with."
"Works great, I would highly recommend this laser over others I have purchased."
"I purchased this on December 15 2017 when it arrived I was very satisfied with it, however, after not using it for about a week and a half I decided to use it again, when I plugged it in I noticed it was a lot weaker then before and after about 3 minuets of trying to figure out what was I decided to plug it in again and didn’t work at all except for the cooling fan."
Best Lamp Holders
With AMIR Double Arms Clip on LED Reading Light, you can: Reading your favorite book without disturbing your partner. AMIR Double Arms Clip On LED Reading Light with 8 LED extra-bright lamps in 2 adjustable and flexible arms can give out soft light. Working Voltage: 5V DC. - LED Quantity: 8. - Charging time: 2h (USB charging cable included). - Discharge time of full charging: 4h at Full Brightness, 6h at Half Brightness. - Life Expectancy: 10000 hours. - Material: ABS, LED light, battery, plug. - Button function: 50%-100%-off. - Accessory: USB cable. Bright enough for reading at night and can easily light up 2 pages of book, notebook & anything else you'd like lit up. 【EYE PROTECTION】 The reading light produces soft Eye-Care lighting source, flicker-free, anti-glare light without ghosting to relieve eye fatigue. 【360 DEGREES ADJUSTABLE & PORTABLE】Not only super lightweight with 5 level brightness, but also the flexible yet sturdy goose neck make it very easy to carry, allowing you to position your clip reading light anywhere you want it.
Reviews
Find Best Price at Amazon"Price. Multiple lighting modes with the independent arms. Fits on books as well as furniture. Rechargeable and holds a charge well. Feels pretty solid. Cons: Small charging cable. If you have a desk that is on the thicker side then this might have trouble gripping."
"Many intelligent features here: The clip has a 'foot' that adapts to thicker/thinner surfaces, gripping with enough friction to hold without crushing."
"I really do like this light, as each light operates independently, and has two levels of brightness."
"My only complaint is it takes longer to charge it then the amount of time you can use it before it starts getting dull and pretty much useless."
"This has 2 settings, one of which is moderately bright, and the other is super bright making it easy for me to read in pitch black conditions."
"This double headed version I ordered to use for my music stand, and I am mildly disappointed with the intensity of the light."
"Seriously excellent and BRIGHT."
"Best book light I've ever purchased, it's def a live saver when I have to catch up on some reading late at night while everyone else is sleeping."
Best LEDs
*Qty:20LEDS. *Length:2.2M/7ft. *Voltage:6V. *Mode:Turn on/off. *Wire Color:Silver Color Wire. *Led Color: Cool White. *Working Hours:48 hours. *Length between 2 leds:5cm. *Length from the first Led to the battery:20cm. *Power Supply:2*CR2032 batteries. Package Includes: 6 * 7ft/20LED Silver Color Wire String Lights. Safe to Touch: Low power & heat insulated copper wire will not make it overheat during usage.
Reviews
Find Best Price at Amazon"Work great and brightens up the surrounding areas."
"I was putting these in old empty liquor bottles for night lites and dang these are bright!"
"What I really like about these 'mini' string of battery operated lights is that I don't have to 'pulllll' them thru each area I wanted to light-up."
"I love my string lights is very easy to put on , and is battery operate witch is saving money on electricity, also have a remote control , you manage all the move of the lights and program if you dont't have time to shut off with the control , I've been shopping and keep shopping very safe and easy to put on any place ."
"Amazon refunded the original order and I was able to re-order it and get it in time for what I needed it for."
"Previously we bought a battery ppwered light string from walmart that ran off two AA batteries."
"Love these lights!"
"The first order of lights I rec’d in a couple of days."
Best Optotransceivers
Description: The EAITRBA0 consist of an infrared emitting diode and an NPN silicon phototransistor, encased side-by-side on converging optical axis in a black thermoplastic housing.
Find Best Price at AmazonBest Optocouplers
4 pins, dual row, 2.54mm pitch.Used widely in computer terminals, system appliances, measuring instruments, registers, copiers, automatic vending machines, electric home appliance, switching power supply, etc.
Reviews
Find Best Price at Amazon"I used a 510ohm resistor in series with the input, and a 10Kohm bleeder resistor in parallel with the input."
"These are opto isolators for assuring that noisy inputs from an ancillary unit whose input is required, don't mess with the circuits in the box."
"I use them on arduinos to trigger other circuits and avoid an electrical connection between them."
"Just what I was looking for; now my project has a better design and better digital line protection and coupling."
"Work fine and good price."
"Nice, inexpensive selection of Opto-Isolators."
"worked great in my tv repair job."
Best Infrared Emitters
The Smarthome IR Emitter Shield covers an IR Emitter that has been attached to your Audio / Video component - increasing the signal reliability but preventing signal loss and blocking out other IR signal interference. Prevents outside infrared signals from interrupting or entering another sensor window (interference).
Reviews
Find Best Price at Amazon"These work perfectly to hold your emitters in place."
"Only thing that works where multiple IR transmitters are in close proximity."
"Excellent product works far better than the hard plastic type products being sold."
"A necessary evil for Elan system."
Best Optoisolators
These diodes exhibit low dark current under reverse bias and fast speed of response.
Reviews
Find Best Price at Amazon"Nice PIN photodiodes."
Best Photo Detectors
The cadmium sulphide photocell turns on lighting when the ambient light level drops below one to three foot candles (fc) and works with screw-base compact fluorescent (CFL) and LED bulbs. Specifications Photocell type. Cadmium sulphide photo sensor and switch, turn-lock mount. Input power supply. 105-130 VAC, 60 Hz. Output. 1,000 watts. On/off control. 1-3 fc ambient light, instant On, 3-5 seconds Off delay. Enclosure. Gray polypropylene, UV stabilized. Mount style. Turn-lock mount. Operating temperature range. -40 to +158 degrees F (-40 to +70 degrees C). Standards met. UL Listed, ANSI C136.10, EEI NEMA. Automatic switches are used to turn on or off electrical devices and are activated by time, light, and motion. Light activated switches (also known as optical or photo) operate when ambient light levels reach preset values, generally measured in foot candles.
Reviews
Find Best Price at Amazon"This was very easy to install."
"Good quality and great price."
"Fast delivery.Works great."
Best Optoelectronic Lamps
Specification: Power input:120v/60Hz. Power Source:Plug in. Bulbs: 15 Watt E12 Socket Incandescent Light Bulbs. Safer Touch Dimmer Switch(US 120v only): Definitely safer than other brands that has potential fire hazard.It comes with patented touch dimmer switch to adjust brightness and match the ambiance.It has 6.6ft power cord and two extra 15 watt bulbs. 2 Years Warranty, 2 extra replacement bulbs included（the replacement bulb is in stock for purchase,just search:levoit light bulbs). The Natural Salt Night Light: When lit with the included 15 watt incandescent light bulb, it gives a warm amber glow, creating a romantic vibe and boost your mood.
Reviews
Find Best Price at Amazon"I love salt lamps and already have 2 but wanted a bigger sized one for my entry way table."
"I also have the Natural Solutions salt inhaler which has helped with my breathing issues."
"I now use the lamp daily, and have found that I can leave the lamp on during the day and turn it off at night with the same good results...but I still prefer leaving it on as it makes a wonderful nightlight."
"Ours is rather flat on the top, but I realize the shape is bound to vary with each item, so not much can be done about that."
"I purchased this as a second salt lamp since I like the one I received for Christmas so much."
"I received my first salt lamp from my daughter as a Christmas gift."
"The lamp is absolutely gorgeous!"
"Also, the light is more red than pink and does not produce enough light to replace a traditional lamp for those curious."
Best Optoelectronic Displays
Our high CRI (Color Rendering Index) means that the LED is emitting more of the color spectrum than a typical LED. Most states will not allow electricians or home owners to install LED lighting products that have not been tested by a certification laboratory. The UL CERTIFICATION is indication of a superior quality product that has passed numerous tests before getting its approval. Improving energy efficiency can reduce emissions that contribute to global warming, mercury contamination in lakes, acid rain, and nuclear waste.
Reviews
Find Best Price at Amazon"Bright enough in our kitchen (six, 850 lumen bulbs in ceiling cans - 12 by 17 kitchen, 12 foot ceiling) that I am going to install a dimmer so my wife can have full illumination when she is trying to read a recipe and lessen the level when just making coffee or emptying the dishwasher."
"It doesn't bother us, but if we turn the switch of when these bulbs are on a low setting, then they don't turn on again unless we move the dimmer."
"When I installed the lights at first, I had one flickering light and one dim light so I was uncertain and declined to review these lights."
"Most but not all are on dimming GE Z Wave dimmers so they are used daily due to automatic schedule."
"We got these for our old recessed canister lights in the kitchen but they wouldn't fit ... the neck of the bulb near the socket was too wide and so the bulbs wouldn't screw into the socket (the problem wasn't the light, but my old fixtures, because we tried similar LED makes and they wouldn't fit either)."
"These are so bright that I couldn't tell they were dimming."
"Color is a nice bright white - not yellow, not blue, just clean white."
"Replaced the old bulbs with these today and have to say the difference is really night and day."