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This is why the #define statements were used at the top of the code. The if-statement on line 45 independently controls the strobing of the active LED. It makes sure to disable both LEDs before setting a state, so one does not get “stuck on.” The first if-statement (line 36) checks to see if it time to switch the active LED. The millis() loops should be self-explanatory, after reading the millis() multitasking tutorial. millis() if-statementsīoth of the millis() if-statements make use of millis() rollover handling, instead of trying to reset millis(). This variable determines the rate at for the currently strobing LED. This variable tracks the millis() value needed before switching between the Red and Blue LED. #ARDUINO AS TIMER FOR STROBE LIGHT CODE#The #define statements are optional, but make the code easier to follow later on (Around line 46). ![]() Using a couple of #define statements, this variable tracks which LED should be strobing at a given time. #ARDUINO AS TIMER FOR STROBE LIGHT UPDATE#Each iteration of loop() will update the LEDs with a digitalWrite() based on this state variable. This allows logic inside the loop() to determine when the lights should be turned on or off. Instead of using digitalWrite() directly, “state” variables are used to determine the state (on or off) of each LED. WhichLED = !whichLED // toggle LED to strobe Toggle back and forth between the two LEDs Unsigned long waitUntilSwitch = switchDelay // seed initial waitĭigitalWrite(LED_Red, Red_State) // each iteration of loop() will set the IO pins,ĭigitalWrite(LED_Blue, Blue_State) // even if they don't change, that's okay Variable to see when we should swtich LEDs Seed the initial wait for the strobe effect In that case, you need a different string of LEDs with plain old fashioned stupid LEDs.// Some delay values to change flashing behavior That assumes that the LEDs are “stupid.” There are LEDs that contain a small processor themselves, and you can’t just chop their power and be happy. ![]() Set thr controller to “always on” and you should be able to flash your LEDs at speed. #ARDUINO AS TIMER FOR STROBE LIGHT SERIES#Cut the wire feeding the LED after the transformer, and put your relay in series with that. What you’ll have to do is to leave the AC adapter plugged in all the time. The LEDs don’t go on immediately when the power comes on because the processor has to start up and prepare to do its thing (it flashes the LEDs itself normally.) The output from the transformer doesn’t shut off immediately when you disconnect it from AC. The key point is that your string of LEDs is microprocessor controlled, and that you seem to be controlling it by switching the AC power on and off. The only “specifications” available are whatever the seller feels like putting in his advertisement. This is a consumer article rather than something you would buy from an electronics supplier. That’s on and off at 23 times per second, so the relay should be fast enough. It should take at most (3*(1 second / 60 Hz)/2 +1 millisecond)= 26 milliseconds to turn off. You are using a 210B relay, so it should take it at most ((1 second / 60 Hz)/2 +1 millisecond)= 17 milliseconds to turn on. If you buy your parts from proper suppliers, they will provide dasheets for things like your relay.Ĭhecking the datasheet for the relay,we find this bit of information on the switching time: So please try to spell out all terminology and concepts the best you can. Sleep(1) #these values I adjusted and visually determined the minimumĬlearly, I am new to electronics. LedPin=board.get_pin(f'd::p') #digital, pin, pwm In regards to the code, I used Python through Pyfirmata: from pyfirmata import Arduino, util Lights – LE Globe String Lights with Timer, 33ft 100 LED, Multicolor, Plug in Twinkle Light, 8 ModesĪrduino clone – Elegoo EL-CB-001 UNO R3 Board ATmega328P ATMEGA16U2 Relay – Omron G3NA-210B-DC5-24 Solid State Relay, Zero Cross Function, Yellow Indicator, Phototriac Coupler Isolation, 10 A Rated Load Current, 24 to 240 VAC Rated Load Voltage, 5 to 24 VDC Input Voltage Otherwise, the “on” information is too late getting to the lights and finally turning on when it is supposed to be off, and this delay increments making the whole thing a mess. In fact, from testing it, the most I can do is ~every 1 second on and. The problem is, I can’t flash on and off the lights every. However, I tried it with a solid state relay and a strobe lights and its not working. 1 seconds a new signal (1 or 0) is passed from the arduino digital pin 3 based on a numerical analysis of the song data I preformed previously. When doing this with a mini LED and an arduino, it works perfectly with a “flash_time” of ~.1 seconds. My goal is to flash lights around the house on and off to the beat of a song. ![]()
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