Review on 🏡 Arduino and Raspberry Pi Compatible 4 Channel I2C AC Dimmer Light Bulb Smart Home for 110V 220V 50hz/60hz - Ideal for IOT Projects by Jeff Leu

It works like a dimmer, but not in the way you might expect. First things first: I'm in the US where the voltage is 120V and the frequency is 60Hz. I have not tested this at 230V/50Hz. Now the setpoint you program is not a brightness level (e.g. 0 = dark, 100 = bright, like most "smart" devices I've worked with) but a "dim" level (i.e. each higher the number, the lower the performance). This is stated in the docs I found, so I can't deduct points for this feature. The reason I feel justified in giving only three stars is that although you can set any channel to 100-0, there are not all valid values! In fact, the dimming range is much narrower than one might think given the 100-0 range. I had to do some work to make it behave like other power controllers. I've found that values from 0 to about 18 give full power output (>95%) for all intents and purposes. Values between 30 and 48 are fairly linear (72%-30% yield). Values between 66 and about 78 give 100% yield. Anything from here up to 100 gives 0% output. What I finally did to "correct" it was to match any given point to the true RMS voltage at the terminals of a connected 40 watt incandescent bulb. I plotted the results and found that I believe this device only has about 30 really different output levels, not 100 as you might think. I decided to create a mapping array that would take 32 given values (a power of 2) where 0 is off and 31 is on. That's about 3% output power per step. Here is my map (in Python list syntax): map = [ 66, 65, 61, 59, 57, 55, 53, 51, 50, 48, 47, 46, 44, 43, 42, 41, 39, 38, 37 , 35 , 34 , 33 , 32 , 30 , 28 , 27 , 25 , 23 , 21 , 18 , 14 , 0 ] So if I want a power level of 50% (31 * 50% or about 15) I'll take Get the 15th element in my map array which is 41 and write it to the dimmer. With this setting, the **MY** dimmer produces an output voltage of about 84 volts, which is (84 volts/120 volts)^2 = about 49% of the output power as a percentage of the power. very high quality processing, and the blue LEDs for displaying mains voltage and frequency are pleasant to the touch. On the **MY** block, the triac heatsinks appear to be isolated (according to the **MY** voltmeter) from the hotline conductor, but there are many other live points on this board, so be careful. .I would buy this again but would be more interested in working with the developer to see if there is a way to overwrite the firmware to get the full dimming range. If he or she provides new firmware or microcontroller source code for this device I would happily upgrade this rating to 5 stars. to get the full dimming range. If he or she provides new firmware or microcontroller source code for this device, I would like to upgrade this rating to 5 stars. to get the full dimming range. If he or she provides new firmware or microcontroller source code for this device I would happily upgrade this rating to 5 stars.