Make this temperature controlled fan and since i am using 15V AC power supply instead of 230V AC. what i want to know is if i would have to change the triac and the resister shown in the diagram below and also if i can use MOC3041 Triac driver optoisolator (RC) instead of MOC3011 the chances are that the opto isolator/driver may not work at such low voltages.
Click here to download the full size of the above Circuit.
the triac will work. you can get rid of the MOC3021/11/41, if you can rectify the 15 VAC into DC and directly use the triac (or SCR) with 1K resistor to its gate and use a normal optocoupler like PC817 or MCT2E thankyou for your reply arun. but from this all i understand soo far is to keep everything in the circuit and replace the MOC3011 with optocoupler as shown in the diag below. what i dont understand is to where to put the rectifier on the circuit. I mean if i convert the ac to dc, what value of dc would this give me and if i am converting ac into dc then can i use both ac and dc fans i was just wondering if the rectifier converts the 15Vac into 15Vdc can i just use a 15V or something dc power supply and remove the rectifier from the circuit and also on ur diagram above u have 5pins for the optocoupler. pin5 for +5V dc, pin4 going into resistor and what about the rest, is pin1 going into the port 22 of the microcontroller and where are the rest of the pins going Yes, if you use DC supply for fan then you can remove the bridge ( but you first said you had 15V AC ). The LED part of the optocoupler in my diagram should be connected the same way its in your original schematic. and you don`t have to connect the pin 6 ( collector), leave it floating. I think you have to be clear in what you intend to do, you had first said you have a 15V AC supply for fan and now you are saying you have 15VDC supply - if the latter is true...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: