467 Threads found on edaboard.com: Relay Light
you can use (NOR, NAND) gate... or electric relay... if you want to use NAnd gate for example you must connect first input to +VCC and let the second Input be connected to the first light wire.. the second light to the output of the NAND gate. so if the input was 1 from light one then the output will be 0.. (OFF). if (...)
Hobby Circuits and Small Projects Problems :: 19.02.2003 19:49 :: Hishamsaleh :: Replies: 8 :: Views: 8005
these lightbulbs are a con and the light gives you megrains
it is so simple too pay 10 % of the cost of 240V 50 HZ ac
think about it ac is 1.707 * rms value
so simply add a bridge rectifier {25 amps 500V !!! watch the piv high as possible please!!!} and dim this instead with just a good quality remote con
Professional Hardware and Electronics Design :: 02.03.2003 12:33 :: sick_man :: Replies: 4 :: Views: 3235
hi endikus
if the problem is with load connected to relays try to use varistors in parallel with the relay contact in order to avoid spark.
Hope this help.
Microcontrollers :: 13.03.2004 22:02 :: crono :: Replies: 11 :: Views: 5702
I am wondering to drive high power lamp using Mosfet or relay?
Could anyone explain the main difference between these two schemes?
Thanks a lot!
Electronic Elementary Questions :: 31.01.2005 03:23 :: bluewave :: Replies: 7 :: Views: 3376
Some relays can be connected directly to an FPGA with no additional circuitry.
Please tell us more about your relay so that we can understand you problem.
PLD, SPLD, GAL, CPLD, FPGA Design :: 06.06.2005 09:44 :: echo47 :: Replies: 5 :: Views: 1768
Connect 100 diodes in series in one direction, then connect 100 diodes in series in the opposite direction ..
Connect both chains front-to-back in parallel and add capacitor in series with diodes .. The role of the cap is to add some non-heating resistance so diodes are not exposed to full 220Vac but to <200Vac (100*2V) ..
You
Microcontrollers :: 25.11.2005 08:45 :: IanP :: Replies: 9 :: Views: 890
hi,
can any one suggest a solution for avoiding the spark at the relay contact for a AC inductor load ?
Thanks
Binu G
Analog Circuit Design :: 13.12.2005 06:28 :: binu G :: Replies: 7 :: Views: 3802
What is the best way to connect the 4N33 to acheive the desired result?
Use this kind of the value of 1K resistor according to your 3,3v input if the 2N3906 transistor is not able to provide enough current to activate the relay.
The"+" cont
Electronic Elementary Questions :: 08.03.2006 20:04 :: silvio :: Replies: 6 :: Views: 12796
WOW .... you folks are terrific and thank you very much.
on1aag
this is exactly what I am looking for.
I have a spec racer ford (see picture) and I am building an enduo motor for it with a different engine (12 hour race). The new engine uses a split port intake and has a motor control to open the second half o
Hobby Circuits and Small Projects Problems :: 21.08.2006 19:19 :: rexlan :: Replies: 4 :: Views: 2649
Hi Guys,
Anybody can give me an idea about the mono audio output signal from my fixed termnal can use a low power light bulb instead of a speaker. I have a project instead of hearing a beep sound coming from the speaker as a result of the bar code scanned process, I want to see a status light. What should I use a relay or switch device (...)
Electronic Elementary Questions :: 08.09.2006 03:39 :: rsapan :: Replies: 2 :: Views: 1231
see the link
and search
MOC 3020 based semiconductor relay circuits
(also they use TIC226D)
most
Robotics and Automatics Forum :: 17.02.2007 17:56 :: mostrengo :: Replies: 4 :: Views: 1292
First off, I hope the outputs of the darlington array arent' tied together (the gain of a bjt increases with heat and you will get thermal runaway when a bunch of bjt's are paralleled.) Second, I assume you are going through a ballast made for the tube, and are not trying to drive it directly, as flourescents require huge voltage levels to turn on
Microcontrollers :: 19.04.2007 08:55 :: jhbbunch :: Replies: 2 :: Views: 686
Hi all, very easy question, can i turn a fluorescent light on and off with a standed relay?. i am tring to do this now, but it not working (conntroller is locking up), and what i can see using google is that i should be using mosfets.
thanks, Mark
Electronic Elementary Questions :: 19.04.2007 11:57 :: markdem :: Replies: 3 :: Views: 1372
Case 1: light sensor control AC lamp automatically using PIC?
Case 2: User choose to switch on/off AC lamp.
Anyone can help me with the codes?? I need to use assembly. I need the circuitry as well.
Thank you.
Hobby Circuits and Small Projects Problems :: 16.06.2007 17:00 :: tschen :: Replies: 0 :: Views: 1447
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
Analog Circuit Design :: 27.07.2007 01:46 :: serpy :: Replies: 0 :: Views: 445
Well to controll the switching of light its quite easy to do...you just have to know the number of your lights as the number of your light will determine the size of your pic...well the very simple one would be to use PIC 16F84 using it you can get 13 I/O Pins ...well as you need to drive high voltage 220 V device so you'll ha
Microcontrollers :: 03.10.2007 12:06 :: hassan1980 :: Replies: 10 :: Views: 1038
across the relay...
Microcontrollers :: 09.10.2007 13:20 :: A.Anand Srinivasan :: Replies: 22 :: Views: 1027
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
Electronic Elementary Questions :: 09.12.2007 17:51 :: E-design :: Replies: 11 :: Views: 6207
Hobby Circuits and Small Projects Problems :: 10.01.2008 11:11 :: rokibulalam :: Replies: 4 :: Views: 1477
im sure this isnt the only one but there is a part called the DS2E-S-DC5V and what it is is a 2 Form C relay that requires a certain voltage and current to flow through it so it runs, What i would do is
Analog Circuit Design :: 31.03.2011 02:04 :: Fworg64 :: Replies: 1 :: Views: 694
I'm working on a project using IR Led and IR detector to control a relay.
I created a circuit using 555 timer to create 38Khz square wave so that my IR Led can transmit at 38Khz.
Can anyone explain to me what kind of signal that will be output from the IR detector? As I saw from the oscilloscope my IR detector receive a wave form that look like
Microcontrollers :: 06.10.2008 07:48 :: wanbong :: Replies: 7 :: Views: 1507
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
Hobby Circuits and Small Projects Problems :: 20.01.2009 00:12 :: creg20 :: Replies: 0 :: Views: 2428
hi
I buy this relay
but now I don't say work with them...
for example, when I buy this relay my ideia is for have 2 positions when I put a power signal on relay it go to position 2, after I turnoff the signal and ir stay on position 1, but when I put again power signal it go to position 1...
Electronic Elementary Questions :: 27.02.2009 17:22 :: filjoa :: Replies: 7 :: Views: 1940
Type general family of circuit you need is called a missing pulse detector. Below is a link to an example. This can be done with existing timer or oscillator chips, like the 555. Or, as you mentioned, it can be done using a small microcontroller. Using an exisiting multivibrator chip or timer is usually faster to design. However, the microcont
Hobby Circuits and Small Projects Problems :: 14.08.2009 13:54 :: banjo :: Replies: 9 :: Views: 4979
what type of relay is on this circuit... i cant determine it...
and what is an alternate transistor SL100?
Hobby Circuits and Small Projects Problems :: 07.09.2009 07:14 :: animehunter1234 :: Replies: 2 :: Views: 2671
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 (...)
Electronic Elementary Questions :: 23.09.2009 21:26 :: betwixt :: Replies: 3 :: Views: 898
Hi,
I have a PIC micro which i want to connect to a 24v 1A DC light (bunch of LEDs packed into one big light), I know i can use a relay and ULN2003a and 24v supply to do the things, but I am not understanding how to connect them together. Please help me with the connections. A schematic would be of more help.
Thanks in advance
Electronic Elementary Questions :: 24.09.2009 06:34 :: irshad.khn :: Replies: 17 :: Views: 8211
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
Hobby Circuits and Small Projects Problems :: 20.10.2009 07:42 :: pranam77 :: Replies: 1 :: Views: 1662
I want to have both lights on.
A relay might be easier but I I just want a single coming from the primary light, not two.
With a transistor it would do it that way I want.
Please I need help.
Electronic Elementary Questions :: 08.02.2010 18:48 :: Superman-- :: Replies: 2 :: Views: 604
I have the circuit as attached and the functionality is as follows:
- by default the relay is turned ON
- by default the LED doesn't light
when "CONTROL" is pulled down the LED lights up and the relay should turn off.
The probl
Hobby Circuits and Small Projects Problems :: 12.03.2010 05:43 :: active_si :: Replies: 4 :: Views: 1552
Hi,
I am new to 8051 and want to use relay for switching light and 24VDC motor. When I switch on the circuit relay started automatically some times. Here is my circuit.
Resistors - 10K, Transistor - bc547, diode - 1n4007
Microcontrollers :: 24.03.2010 10:56 :: pds333 :: Replies: 19 :: Views: 1414
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
Hobby Circuits and Small Projects Problems :: 18.04.2010 00:41 :: Nikkanochi :: Replies: 3 :: Views: 2727
i have connected one terminal of relay to fix 12v and the other to uln... the question is would it work if i supply logic 1 to the uln...
i assume that when i would supply logic 1 it would turn the relay on... the connections are same as in pic except instesd of 24vdc i m using 12vdc...
but it doesnt work.. what could be the prblem?
Analog IC Design and Layout :: 25.04.2010 09:24 :: sherazi :: Replies: 5 :: Views: 2210
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
Analog Circuit Design :: 17.06.2010 16:42 :: helloiamkat :: Replies: 2 :: Views: 1503
But still you may build a current monitor which will trrip the relay when the current varries below it abouve the set point which will serve even when the pump gets blocked...Cheers
Hobby Circuits and Small Projects Problems :: 25.06.2010 10:33 :: pranam77 :: Replies: 4 :: Views: 976
Use phase control at the required brightness level in normal circumstances and use a PIR motion detector to detect a movement and trigger full phase angle for full brightness for a predetermined time. Write a program with the said sequence an dprogram the PIC. But its quite easy to do this even without any microcontroller. Just use a standared fan
Microcontrollers :: 02.07.2010 16:38 :: pranam77 :: Replies: 3 :: Views: 937
hi to all,
i am working on motion sensor project and in need of help now.....here i am attaching the circuit, plz lemme knw the connection of coil and diode in circuit coz i could not understand wat is it and why it is done for??....plz help me out and also tel me whether it is possible to make this circuit work with dc supply i
Hobby Circuits and Small Projects Problems :: 01.03.2011 09:24 :: pranam77 :: Replies: 8 :: Views: 3133
Hi,
For me is an interesting question what means + & - on your relay?
If is + for the Anode an built in diode: its yet revrsed in the circuit...
But I didnt understand: do you have some problems pls. or you likes some "supervisoring"?
K.
Electronic Elementary Questions :: 17.07.2010 19:58 :: karesz :: Replies: 8 :: Views: 1098
I want to use a 5V relay to switch a 12 volt light circuit on.
I know how to wire the relay except I have a question. My relay will be open with the coil is energized and closed when the coil is de-energized. I'm wondering if I should add a resistor the coil part of the circuit to limit the amount of current passing (...)
Analog Circuit Design :: 22.07.2010 03:21 :: tmort :: Replies: 2 :: Views: 472
hi, i need some help in developing a battery status monitor for lead acid batteries wich should be able to indicate the remaining charge in the battery. when the charge goes to 0% this circuit should be able to open a relay and diconnect the load to prevent draining the battery so that the vehicle can't start anymore.
I want 5 leds indicating the
Analog IC Design and Layout :: 23.08.2010 22:30 :: huramentzefix :: Replies: 13 :: Views: 1498
The bold emphasized conclusion is wrong. The green LED can be powered by capacitor as well.
- Once the coil is energized, the relay engages severing the connection between pole-and-(t1) which causes the green LED to go out
The situation is more complicated, if the schematic is correct and both LEDs have a common current l
Electronic Elementary Questions :: 02.09.2010 07:36 :: FvM :: Replies: 6 :: Views: 876
A snubber in this case is just a resistor and capacitor in series, wired across the relay contacts. You can buy them ready made as a single component with two wires. All you do is connect one to each side of the contacts.
The idea is they absorb the 'kick' of energy that might be produced as the contacts open, preventing or at least reducing the ch
Professional Hardware and Electronics Design :: 24.09.2010 19:19 :: betwixt :: Replies: 11 :: Views: 2172
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.
Power Electronics :: 19.10.2010 15:55 :: rvionics :: Replies: 3 :: Views: 521
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.
Hobby Circuits and Small Projects Problems :: 08.12.2010 09:50 :: KJ6EAD :: Replies: 1 :: Views: 1012
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 (...)
Analog Circuit Design :: 10.12.2010 09:04 :: ckshivaram :: Replies: 3 :: Views: 800
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 (...)
Analog Circuit Design :: 26.12.2010 06:11 :: luben111 :: Replies: 6 :: Views: 1036
Is each transistor to drive 5 bulbs or 1?
No - it's like this :
Of the 50 bulbs 18 are placed in the herd (9 clear + 3 red + 3 blue + 3 yellow) and 16 are placed in the limelight (10 clear + 2 red + 2 blue + 2 yellow).
So at max 1 swich/transistor relay shall operate 10 bulbs (the 10 clear in the lime light). Pow
Electronic Elementary Questions :: 21.01.2011 19:37 :: macmorten :: Replies: 3 :: Views: 290
@ 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
Hobby Circuits and Small Projects Problems :: 01.03.2011 07:24 :: kapilp :: Replies: 1 :: Views: 1758
I can only second the idea of using SSR (solid-state-relay) ..
Easy to connect, no external power source and safe ..
See attached picture ..
Here is comprehensive revew on LPT:
Parallel port output
IanP
:wink:
Hobby Circuits and Small Projects Problems :: 19.03.2011 02:37 :: IanP :: Replies: 2 :: Views: 3838
Well if you know how much current it gives out for that split second that it lights up you could get a 12v latching relay and wire it so that when the alarm goes off it flips the relay and turns on the
Electronic Elementary Questions :: 28.03.2011 05:06 :: Fworg64 :: Replies: 8 :: Views: 643
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