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62 Threads found on edaboard.com: Relay Light
Change the relay which drives the load. If it is 12V relay then choose a similar 12V relay which can switch a 230V 10A load. Provide link of your Clap Switch Module.
108206 Hi every body. I am trying to create automatic light control circuit for washroom. I made some thing and want to share with experts. Please check the circuit and tell me if I am missing or using anything extra in the circuit. Let me explain my circuit and problem; I place magnet on the door and this circui
hi i want to operate the attahced the circuit shown in proteus for voltage limitations. 1. first led on when voltage is under 1.5 volts. 2. second led on when voltage is over 4.5 volts. the problem is i dont know how to write code for the very same relay which i have shown in proteus file. now looking for c code (mikroc)
The part showing the connection of 5VDC to the PIR sensor is correct. I do not understand what Uc is and to what the vibration sensor should be connected? PIR sensor output usually is a relay contact to be used to light a LED or to activate a buzzer or alarm. The vibration senor is a different device.
Hello everyone, I have tried to communicate 2 microcontroller using CAN-BUS , It's worked . Now , I'm trying to turn light bulb using those 2 micro ( 1 micro as input , and the other as output ) I choose ULN2003 to drive 2 relay. but I got stuck!! The problems begin when I put the relay + ULN2003 in my shield. I separated (...)
Hi guys, I've got a night light - that powers a 2 volt LED - when it gets dark. I've got a 12 volt wireless alarm sender. What I want to do - is join them together. So instead of making the led light up - it allows the 12v alarm sender to send a signal to the alarm box. From looking around - I think I need a relay? But I (...)
A relay has only two possibilities of different light levels, i.e. high and low. A dimmer can do a much wider range, from off to fully on and all intermediate values. Frank.
MosFET - Dim 12V light Bulb with 555 IC Project Circuit -
shall i use 8 pin relay instead of 5 pin relay? Verify the 8 pin relay is having the same or more capacity at its contact ratings than the 5 pin relay you are using. 5 pin is called SPDT relay and 8 pin is called DPDT relay. If you intend to use 8 pin relay instead 5 pin, (...)
hi everyone !!!!!!!! I want to switch 7 light bulbs using a relays (for a decoration purpose). i'm using 230Vrms-50Hz here is my WORST case scenario switching speed 1Hz straight for about 12hours maximum power of bulb 100W this is the relay i'm using my questions
Draw the relay logic diagram for a circuit that operates as follows: A. When switch one (SW1) is closed, the green pilot light turns on. B. When switch two (SW2) is closed, the yellow pilot light turns on. C. When both SW1 and SW2 are closed, the green and yellow pilot lights turn off, and the red and white pilot (...)
I?ve made a circuit of an AC controller (light dimmer) with 3 on/off switch to control AC load. I used PIC microcontroller to control the whole things. Detail description - 1. Three relay (6V dc; 250V AC, 10A) to switch on/off three AC loads. PIC MCU takes input using push button switch and provides output to relay driver (base of BC547 (...)
Hi, Recently I build a project to control the devices at my home using an IR Remote (RC5 protocol and TSOP) I used a 230V spst relay with a 5v coil. I connected the coil to the controller data pin through ULN2003a. I was successfully able to switch on and off all the devices (Fan, bulb, tube light, TV). But there is this one tube lig
If the HID current return is chassis sheet metal, that's a bad setup. If it were me I'd be hardwiring direct to battery or the first posts downstream, both + and -. I'd do power switching with a relay if there's none provided, running its coil off the present light power. A weak battery may not be able to make up the startup current, and that cu
Hey im just wondering, it's possible to controll relays from a light switch? light switch u normaly use in wall. Reason, i have a pump and a heater where the sockets are hidden away in wall, so every time i leave the house i unplugg these, so the heater and pump should not start when i im not there. so switch to (...)
what is the advantage of SSR vs Conventional relay and its application?? Thank you
i'm trying to combine these two circuits a. light/dark sensor b. dimmer but having problem to figure out how to control the dimmer using ldr in the 1st circuit and also i cant figure out why my relay doesnt work with 12v source. can someone help me.. sorry my basic knowledge in electrical is very low. :oops:
Hi, An even simpler isolated method would be a cheap mains coil relay activated by the generator with the contacts switching the micros port.
I am making a led light using 6v battery. I need a low voltage cutout circuit to protect battery from getting deep discharged. I have seen many circuits, but all switch off light slowly. I need a sharp cutout circuit which disconnect load at 4.7v , but without relay.
i'm a hobbyist and a beginner in electronic components. i have a circuit and trying to figure it out. i checked the connection in the circuit board and it looks like am confused, with the first image there is 12v power
This driver has 6 transistor keys for 200V voltage, current up to 6A and two 230V sockets controlled by a relay with current carrying capacity up to 10A. The aim of this device is to control the level of light that behave in similar
See the modified circuit attached in order to obtain 20 min ON/20 min OFF relay.
Adam, Welcome to Edaboard, If I understand correctly You whant automatic switching by some photo sensor or by manual switch ? Your new version of question give better understanding of issues. You can use some dark detection circuit with relay or mosfet on output for switching light bulbs. But I think that is not so smart solution.
if you are aiming at controlling mains ac load, then you have 2 choices: either use triac driven from microcontrolle through an optotriac or use a solid state relay (ssr). You also may need to incorporate some kind of mains filter because both of these methods are very likely to generate strong noise in local mains network
The infrared motion detectors used in the alarm industry along with a timer unit could be adapted for your use. A standard PIR light switch will be cheaper. An universal time relay configured as retriggerable off-delay should do.
Why u r using LCD and realtime clock for this purpose( relay on/off).Just use one of ur timer for setting up clock and 4led display for showing time and alarm setting. I have done this project for automatic street light controller in PIC micro which runs on 3.6v NiCd battery.
If you use output to drive a relay then (normally closed)cotacts of relay can control the fan. Be sure, relay coil voltages are same as bulb's voltage.
It is not the relay that produce a digital level. The inductive loop is a part of a tuned self-oscillating LC circuit. When a car narrows this circuit decreases frequency as inductive value increases and opposite when a car leaves the loop. Resulting varying frequency can be demodulated as FM or FSK resulting in a analog level. This signal can the
Normal light bulb is what, 100W (or so), this relay can switch 5*250==> more than 1kW .. No issue here .. :wink: IanP
Check out this schematic. You make a voltage divider with the photocell (you can also replace the resistor with a pot. for sensitivity control). You set the threshold using the pot in the opamp's other input. You drive the relay using a simple transistor (like 2N2222 or something similar). Make sure to use diodes to prevent the relay from killing y
board contains 8 relays and has an USB socket. It can control light, printers and other devices from a computer. The heart of this device is FT245R and as a transistor key, an ULN2803 was used. Additionally, the board was equipped with a transformer, to supply the board from 12V AC w
Hi I think the blinking of Christmas light could be controlled by several different mechanisms. Such as using magnetic relay switch, an oscillator, or bimetallic strip. The on and off effect of the lights can be achieved using relay switch, bimetallic strip, or square wave oscillator. But if one wants the (...)
@ garv ... the 'coil' in your circuit is actually a part of the relay (look above the coil for specs) alongwith the 2 switches. The diode is used as a 'freewheel diode'. The relay 'turns on' the triac and the CFL ... study the individual parts .... will help a lot as this is a very simple circuit. This circuit is made to run on your domestic supply
Actually the real schematic should include strong IIR filter over the measured from the opto resistor signal. This is required to avoid the triggering on/off of the relay if some object is passing in front of the sensor (flying bird) or some strong light source is pointed towards the sensor (car lights). Optically the sensor should have as (...)
connect 230V devices using relay and switch relay when you clap. If you connect bulb using 2 wires and a plug then cut 1 wire end of wire to Common of relay and other end to NC. so when you clap operate the relay. so the connection is made. and you need to plug the bulb always to 230V relay will act as a (...)
Use momentary switches and DPDT relays wired so that one pole of each relay controls it's light load and the other opens both other relay coils. A fourth, "all off" switch simply opens all relay coils.
If you are planning to use relay for auto on/off application in street light, you can either use small or tiny solar cell, LDR (light dependent resistor), Photo transistor & building a small transistor comparator circuit you can turn relay on or off based on the ambient light.
Hi, This is my first post here and I hope I explain this correctly. I am seeking to make a solenoid valve switch on and then off (for oil) after a given interval. It is AC powered, it will be activated by a light sensing circuit. I have been advised to look at relay circuits and driver circuits. Any clues as to what I should be looking a
I have a remote controlled one celling fan speed controlled + one light on/off circuit. The circuit is consist with one 8 pin IC, one optocuplor, one relay, one BT 134 and one 547 transistor, and few resistance and capacito. It is very simple circuit without using microcontroller, so I want to make this circuit which will be cheap for me and my fri
Given: On the third page is schematics. Unfortunately, I am not very good with schematics but my question is: I need relay that will turn relay ON if light is exceed certain intensity. Is there way to rewire this unit so it will do exactly what I want? I will have to calibrate level of l
when the 9V battery is plug in, LED1 does emit light but when i clap there is no function with the per the circuit, LED1 should not glow as it is. It should glow only after the first clap.
I have a series of four relays and found that I need a time delay for the power to what I have named "relay I" in order for the circuit to work properly. I have a 555cn Timer IC and need some help on how to use it to acquire a 5 second delay. Here is my own schematic of how my setup works. Any help is welcome.
hye, im doing a project title ' light Sensor Base On-Off Controller For AC-Load'. Can someone tell me what are the components needed for this circuit?:?: These are the components you need. One LDR, One transsistor, 4-5 resistors, one relay, 2-3 capacitors. Now dont ask for the circuit. Google it you'll find ample of them. Chee
As "betwixt" wrote, you may connect the inputs and the outputs of the ULN and then drive the 1amp load or if you choose to use a relay, you may follow the attached schematic. But for using just one relay you may consider using just one NPN transistor instead using the ULN. Cheers
I think what you need is a comparator driving a relay so the cell switches off at a certain, predetermined light level. Use the photoresistor and a fixed resistor to make a potential divider and feed it to one side of a comparator. Use a potentiometer on the other comparator input so set the light level at which it will change state. The (...)
what type of relay is on this circuit... i cant determine it... and what is an alternate transistor SL100?
hi there all, :!: :D I am building a motor that has to turn a window shade, and am trying to make it automatic so that it opens when it turns light outside and closes when it turns dark. now because it has to turn only until the shade closes I had this idea of using a l
Depends how you classify passive components. Using a latching relay and a few other tricks one could possibly flash the leds in three different states when driven by the 555. Active components: Solid State compo
Hi Have a Zeberg (Tone Winner) AD-9800B that will not start up.. It's the data part that's not working, have checked all voltages and clocks and they are ok.. The JTAG interface is working on the uP (S3C44B0X Samsung ARM7) Then pushing the on button or remote the sets relay clicks and the display light up with a black screen and blue led so
I'm planning on building an IR remote control to control the light bulbs in my room. Im using PIC16F877 MCU. Im not really experience in high voltage so i would like your advice on what exact components are safe to bridge high voltage to pic mcu and a full schematic and installation guide would really help me out .. t