WayinTop 10pcs Sensor Fotosensible de Detección de Intensidad de Luz Digital Photo Resistor Fotoresistor Módulo 4 Pin

J'étais septique au vu du prix mais ils fonctionnent très bien et le réglage est très simple. Le capteur est vraiment petit mais visiblement il fait le taf.

Ich habe ähnliche Probleme mit Messwerten gehabt wie @Rainer in seiner Bewertung erwähnt. Zum Glück habe ich das Datenblatt des LDR-Widerstands, der ja die Basis für diesen Sensor darstellt, und darin eine gute Erklärung für die erhaltenen Messwerte gefunden. LDR-Widerstände weisen einen MEMORY-Effekt auf und durch die Lagerung in der Verpackung sind die Messergebnisse bei Sonnenlicht nicht brauchbar. Ich habe die Sensoren in Sonnenlicht gelegt und am nächsten Tag war der Sensor, den ich für den Bau einer PV-Nachführung benötigt, absolut brauchbar. Mittels Poti kann der digitale Ausgang so eingestellt werden, dass erst beim Einfall von direktem Sonnenlicht sich der Wert von 1 auf Null ändert.Das Datenblatt ist zu finden unter LDR Datasheet.

Buon prodotto.

boa

This module is easy to use and provides both an analog (0-5 VDC) output and a digital 0/5 vdc (Low/High) output. The digital output switches from high to low based on light level and has an adjustable trigger point to control at what light level it switches. Like most similar modules, the output is opposite of what you might expect. In other words, the output goes high in low light and low in bright light.I'll provide some detail below about linearity and other features that may sound negative - it's not. I rated this module highly because it suits the purpose it is made for very well, is very cost-effective, comes in a very useable plug-in form factor and provides a very clear change of output for even small changes in light. The threshold for switching the digital (DO) output is extremely sensitive and can switch on less than 1 Lux change in light. Also because the device delivered matches the information provided on the providers product page -- rarer than one would expect these days. As an aside, I have had positive experiences with every product I have purchased from WayinTop.I bought this device primarily to sense light level changes, not necessarily in Lux or foot-candles, just a relative reading I could use with an Arduino. It worked very well for that. I did some comparison measurements alongside my Dr. Meter light meter (see photo). The WayinTop module was very sensitive but not particularly linear. As indicated in the product info on Amazon, the module has an analog output (labeled AO) and a digital output (labeled DO). I connected AO directly to an analog input of the Arduino and ran a short sketch to display the output on a scale of 0-1023 "units". The sketch also "inverted" the output reading to provide a positive/higher reading for a brighter light. At 16.9 foot-candles (FC) the Arduino was reading 860 units, at 13 FC the Arduino read 830 and at 7 FC the Arduino read 708. This demonstrates that the WayinTop module can distinguish clearly a light change of just a few footcandles.Using my meter in the Lux mode and comparing readings in bright light vs. dim is where the non-linearity became obvious. In fairly bright light the Arduino read 876 units when the light meter read 214 Lux, and Arduino read 892 at 267 Lux. In the bright ranges a change of 100 Lux would yield a change of about 40 units on the Arduino and at the dim light ranges a change of 20 Lux would yield a change of almost 300 units. Again, this did not effect my rating because I just wanted a detectable change when the light changed - linearity or direct conversion to Lux wasn't important to me.But if high dynamic range and easy conversion to Lux is important to you, you should consider other products. Look for products that DON'T use a photoresistor for the sensing element, as this one does. There is a product from a very popular Maker on Amazon which advertises those characteristics. I understand it works very well in that application -- AND it will cost you about 10X what this module costs. As with all these gadgets, buy what suits your application. If you're looking for an inexpensive though well-built module that is easy to interface, easy to adjust and sensitive I don't think you can go wrong with this module from WayinTop.Oh - I mention using this with a microcontroller platform like Arduino or RPi but the DO output could switch a small relay "module" directly if you didn't need programmable integration. I don't recommend driving a relay directly. Rather use one of the inexpensive digital relay modules readily available from Amazon and other sources. Hope this is useful.

Buon assemblaggio, dalle foto sembrava decisamente peggio. Funziona a 3.3V ed a 5V, ha l'uscita analogica e digitale (

Muy buen precio al comprar el paquete de 10. Tiene salida analógica y digital que se pueden usar a la vez. Bastante preciso y fiable. Trae un regulador para poder regular la sensibilidad una vez colocado en su ubicación final. La fotocelula tiene un recubrimiento de resina que la hace perfecta para aguantar perfectamente durante mucho tiempo frente al Sol, y si se desmonta del PCB incluso resistente a la lluvia.