special timer?

How do i make a timer that would have a big button to start the timer, then a touch sensor that stops it. and then where do i get a big timer clock at?

Asked by ClemensY290 8 years ago


Electrical Timer. I need a timer for a Halloween prop.

It's a cadaver that trembles continuously. It runs on standard house current. I'd like it to tremble for only a few seconds at a time, then nothing for 10-20 seconds, then repeat.

Asked by 8 years ago


advice about timer?

I need cheap small timer to use in my device ( voltage protector) to use in control of warranty of 3 months, this timer will connect to led and when the time is finish (3 month of real working) the led will off, this timer should calculate the time of electricity working only ( if electricity cut off the timer not calculate the time when there is no electricity)  the timer continue calculate the time of working only is case of electricity is exist. when the total time of electricity on (exist) reach 3 months the timer will cut off the power on the led so will turn off the led

Asked by rubellamarket 3 years ago



mutliple timer relay with min/max time

I am looking for an Instructable on making a multiple timer relay with a changeable min/max time to light 3 different lights. Ex.: 1 to 2 minutes, light 1 at 1 minute, light 2 at 90 seconds, 3rd light at 2 minutes. when light 2 comes on, light 1 goes off, when light 3 comes on, light 2 goes off. Thanks!

Posted by Roger13077 9 years ago


i need an electronic circuit timer diagram

1.It must be electronic 2.it needs to have the ability to set somthing off like an alarm. 3.it must be small 4.it does not need a display 5.it needs seconds and hundreths of seconds 6.it must be programed electronically. like by a computer or somthing smaller.

Asked by playpep 7 years ago


Can I use a 555 timer to cycle on 1 minute and off 1 minute? Answered

I am kinda familiar with the 555 timer for flashing lights and such, but I am in need of a circuit which will cycle on for 1 min and off for 1 min. Can this device (555 timer) be used for such low frequencies. It will ultimately control a 12v relay to run a bilge pump in an Instructables evaporative cooler which I am making (this mod is my idea which I will share with the original inventor if it works). I guess that if the low frequency is possible I will also need a power transistor to step up to the voltage/current needed to operate the relay. Any help greatly appreciated........ Thanks, Peter :-)

Asked by ppowell14 5 years ago


How to construct a timing circuit for a LED lighting circuit.?

I am new to electronics but a quick learner. I have a dark path that I want to illuminate for about 2 to 3 minutes using a commercial LED light. It is too far to run a 120V line, so I am hoping to use a 3 - Volt Lithium battery connected to a timer that will shut-off the light automatically. I cannot use a motion sensor as the path is lined with trees that would set it off during windy sessions. I am hoping to be able to push a normally off button, have the LED bulb illuminate and, after I have walked past the darkened area (2 to 3 minutes) automatically turn off, I need two units, one at each end. Also, can I adapt the lighting system to solar power? I really don't want to replace batteries often. Can anyone help me. I can solder, follow a diagram and instructions. I will enclose the unit and make it as maintenance free as possible. If my choice of battery power is wrong, please advise me on any improvements. If  there is a commercial timer available please let me where I can buy it incase it's too much for me to build. Thank you.

Asked by hbiles 7 years ago


How to build electronic timer?

I would like to build a 24h timer which will operate for 1min at each iteration. For example: each day at 20:00 the timer will light a led for 1 min.

Asked by chenr2 3 years ago


I need to make an electronic timer.

I want to use a electronic timer to set off a buzzer. LED or vibrating motor, or to ignite things, how can i do this?

Asked by XOIIO 9 years ago



How to wire a Screaming monkey to a timer? Answered

I have a few cheap countdown timers I  bought off of ebay. I want to wire one to a Screaming Monkey so I hear the Monkey scream instead of the normal beeping.

Asked by trek988 6 years ago



Meditation Timer

I'd like to modify a simple egg timer for meditation.  My current timer makes loud harsh staccato beeps.  I'd really like a timer that made something that sounds like a long slow deep bell when the time is up. I have no idea how to do this but I'm guessing someone does and can do it for less than the $100 ones they sell in the glossy Buddhist catalogs.  Any help would be great mattcadorette@hotmail.com

Posted by mcadorette 8 years ago


Electronic timer

I want to make a timer that sounds an alarm every three minutes, pluss one for setting a seperate alarm for 1 minute.  It is to be used during cpr, (treatment cycles are 3 minutes. 1 minute from shock to circulation check.  Can anybody help me??

Posted by leidulv 8 years ago


Gym Interval Timer for Crossfit

Would anybody know how to make an interval timer like this one: http://www.amazon.com/gp/product/images/B004YPI5T0/ref=dp_image_0?ie=UTF8&n=3375251&s=sporting-goods Preferably one that doesn't cost 250$ but still is large and clean. Thanks!

Posted by datsy13 7 years ago


How would I make a timer for a camera that doesn't have one?

So I can take a picture of myself without needing super stretchy arms.

Asked by Kryptonite 8 years ago


Adapt non-CFL-rated timer to operate CFL table lamp? Answered

Can someone help me create a box with a relay inside that sits between, electrically speaking, a non-CFL-rated timer and a table lamp with CFL bulbs? Ideally the non-CFL timer which I have plugs into wall outlet, relay box will plug into timer, and lamp will plug into relay box. What spec relay should I use for a lamp with a CFL equivalent to a 60 watt incadescent?

Asked by tscottme 8 years ago


555 timer

I need help to understand how a 555 timer works, but mostly how I could build one. or if some ones willing to make one for me, i'll buy it, but it needs to have a ways to control it. well talk if your interested. I need it for a gate control for my SCR induction furnes.

Posted by Danielro10 9 years ago


Electrical timer for a water heater

I would like to have a water heater of mine turn on and off with a timer.Its important that the range of the timer is from 0 - 20 minutes. its also important that it can switch on an element that will draw 2000 watts. The timer must be a simple dial and knob type not a digital programmable. It can also be a press button for the amount of minutes example: press 7 times for 7 minutes? any ideas Dino

Asked by jollyboats 2 years ago


I need a schematic...

I need a schematic for a circuit using a 555 timer. I want a switch to activate the timer, which will provide 3 volts to a buzzer for one second, no matter how quickly the target is hit.

Asked by XOIIO 8 years ago


Need to operate a timer with a remote

I have a 6 Volt radio frequency remote control pair and a separate board with a 5 to 12 Volt timer circuit that turns power off to a load after 1 to 300 seconds. The timer circuit uses capacitors and resistors including a variable resistor plus a 555 too plus jumpers from Amazon.com to see a picture,it lists as: GEREE Timer Relay Switch 1-300 second 5V 9V 12v DC input TIME OVER RESET Delay. Will it work if I connect the RFRC to power and then from there wire to the timer and then wire the timer to my load so that I can remotely make the timer circuit  operate my load for the set time? I ask so as not to burn a thing that takes weeks to get. Will the 1 channel remote control receiver's single relay reset back into a NO condition from NC after current stops flowing from the battery power and through he remote control's 5 pin relay into the capacitor(s) of the timer circuit, that is to say, will the remote relay reset to NO after the timer's single relay goes back from NC to NO after the capacitor(s) run out of charge? As a note, I have had very little success finding a remote controlled timer in the 6 Volt range. 12 Volt remotes with timers are easier to find but that is too much power, size and expense for my application. Know of a supplier? If I have enough of this correct to make sense then any wisdom in this matter will be greatly appreciated. Thank you, Vince

Asked by vincenix 2 years ago


240 volt timer ?

Hi all I have a 240v fog machine makes fog like a disco I wish to run it on a timer. For an outside dragon smoke display. I can easily time it purely off /on with a basic 24 hour  household socket cheap timer MY PROBLEM The fog machine after getting power needs a press of a button to activate it. I need a circuit / timer  so  that when it gets 240v power can then "press the button "ie activate I bought a hi tech machine to try  but it loses it's memory setting when timed out on  240v. I need something that keeps its timer cycle intact. Maybe an expert out there can help? Happy to modify something etc. Nick Tasmania

Asked by tassie2 5 years ago


I want to use a 555 timer to be off for 1 minute, give a brief pulse (about 0.5 seconds).

The circuit is to provide a pulse to a 4017B decade counter to count up to 5 minutes

Asked by ralph4ed 3 years ago


Microwave Timer project....

I was wondering if anyone could help me figure out the proper way to connect a 5V battery power source to this microwave timer (pictured) I read this post- specifically the comments, but am worried I might fry the board if I do it wrong and with a 50/50 shot I'd like to ask the experts first. I've provided pictures below. Thanks for any help you can offer.https://www.instructables.com/id/Digital-timer-for-any-electrical-appliance/?ALLSTEPS

Posted by mrshow555 10 years ago


I'm trying to use a 555 timer to flash a LED but I want to be able to adjust the speed of the flashing Answered

I'm trying to build a simple circuit using a 555 timer chip Ideally a low power one so I can power it off 2 AAs to flash a LED at a variable speed from rapid flashing to once every few seconds. any help would be appreciated.

Asked by joeAMERICA 8 years ago


Easiest way to make a timer switch?

I am making a project that requires a timed-switch. Basically, I want to push a button and have an opened switch, then fifteen or so minutes later I want the switch to close. Is there a way I can do this with a variable time without a microcontroller?

Asked by sblaptopman 6 years ago


Hacking a 1-sec accurate timer

Hey all, For my digital SLR camera, I've hacked together a cable relase using a three-way switch. This works a treat, and now it's time to graduate to full automation to help with night time navigation. For this I need to build a timer that keeps a switch in the 'on' position for a certain number of seconds. The timer needs to be accurate to the nearest second, so nothing fancy. Ideally it would be a number pad I can type into the number of seconds. So any ideas? I'm putting together a short instructable to make the cable release. Cheers, Pierre

Posted by eKstreme 10 years ago


on/off timer for Halloween prop? Answered

Hi All: Last year I built a "glow wall" for a Halloween prop using a fluorescent black light from Wal-Mart as the light source. See the following link for the glow wall description:     http://glowinc.com/glow-in-the-dark/shadow-wall.aspx This worked great! The only bad thing was sitting by the switch all night to turn the lamp on/off for the kids. This year I'd like to add timer that would turn the light on for ~30 seconds and then off for ~30 seconds. Any ideas/suggestions? Thanks for the help! amb  

Asked by amb 7 years ago


panic alarm data?

 i request to get data about panic alarm.

Asked by nelson ndegwa 2 years ago


Timer for solar LED dusk/dawn light

I needed a solar recharged, LED light that came on at night. I purchased a small LED light (rather bright with 6 LEDs) that has a solar cell, photo eye and 3 AA size rechargeable batteries. Made to clip on the patio umbrella, it is ssmall and light. The solar cell and photo eye are on one piece. The LEDs, batteries and circuts are on another piece. the two pieces are joined by a wire and are hinged together, allowing the unit to clip on the edge of the umbrella. I plan on removing the hinge and extending the wire to allow a two foot separation. I need to add a timer to this. Something that will turn off the light about 4 to 5 hours after it comes on. I assume it will be something that starts when the LEDs are powered up. Though I guess it may be something that is also triggered by an additional photoeye. Or maybe someone has a better idea? thanks

Posted by jnlvngstn 10 years ago


Hey Guys,I need some help making a project for school

It needs to have at least 1 555 Timer within it. I was thinking of building a jacobs ladder with a 555 timer or if i could get it working perhaps a sonic pulse generator. Want something interesting and that won't take more then 7 weeks to build. Would it be possible to make a Cree Light and mod it to turn off after X amount of time? I'm just struggling to find idea's as our projects must be able to run off a 12V Battery or less and we cannot make anything dangerous. IE Rocket Launch Controller etc.... Thanks

Asked by bcurko 9 years ago


Programmable inline switch (or, how to help your houseguests turn off the lights)?

So, after battling with houseguest after houseguest, I've hit my end. Beyond giving them flashlights and nothing more, is there a way to build an inline timer that can be variably set? Something to sit between the switch and light, and I can set it to 10 minutes for some, 20 for others, and always on?

Posted by hacman 9 years ago


timer-control of PC?

I'm trying to find a simple way to turn on my PC multiple times each day. I use the BIOS to turn it on now to record radio streams. I'd like something external to the PC, and something I could use to set several On Times each day. I don't know where to start. Should I attempt adding a relay to parallel the PC's power switch and then activate the relay? Should I attempt to build Rube Goldberg mechanism to mechanically activate PC's power switch? Wake-On-Lan doesn't seem to be the answer as how would I reliably send signal while I sleep? Even if you don't know of something specific, I'd be interested in where to look or approaches to investigate. Thanks, Scott

Posted by tscottme 10 years ago



Looking for relay

I have been looking for a relay that will switch with .3 vdc.  The other side is just a 9vdc source but the trigger has to be .3vdc or lower. thanks

Posted by zuben 8 years ago


DPDT Timer circuit i.e. Momentary ON (+6v pulse) then OFF for 10 sec's then Momentary ON (reverse pulse)

I need to toggle a solenoid between 2 positions. It isn't spring loaded so needs to be powered between states i.e. a +6v and GND pulse to the coil then wait 5 to 10 sec's before sending another pulse but with the polarity reversed. Simple to do with a 'Mom-OFF-Mom' double pole double throw toggle switch e.g. JAYCAR Switch Tgl Mini CTR-OFF DPDT MOM CAT.NO: ST0358 but I would like to be a bit more automated.  Ideally the cycle will start at power on and then automatically repeat every 30 min's or so but if that makes it too complex, then a momentary push button switch could be included to manually initiate the cycle.  

Asked by DavidB687 2 years ago


LED flash grenade?

I am trying to make an LED flash grenade that I can use for airsoft/paintball. Basically I want it to countdown (from around 6-9 seconds just long enough to push the button and toss it into a room) and when it reaches 0 it would turn on multiple LED's (in a 360 degree pattern) but only for a brief period. (just long enough to temporarily blind someone.) I am pretty new to electronic circuits. I think I would use a 555 timer but not sure. What would be the easiest way to do this? Thanks in advance for the help.

Posted by livingsoul 10 years ago


Powerseed instructable Help (Diet Timer)

I recently saw this device online while researching my most recent new years weight loss resolution.http://www.powerseed.com/how-it-works.htmlThis product blinks every 30 seconds to remind you to eat slowly. You are only supposed to take a bite when the light blinks.While I like the idea of this product I thinkg it would be better if it was a little more flexible. I would like to be able to change the blink time to try and work up to 30 secs. Maybe 5 second increments. This will be my first make - i have been a lurker for a long time - I see tons of cool projects but I would like this to be my first. It seems like it would be a fun make, hopefully a relatively simple one. However, I will need a lot of help with which components I should use. If anyone is willing to help me put together a parts list it would be greatly appreciated.Thanks in advnace!

Posted by patjr 10 years ago


Simple question 230v to 12v 50w/5a timed output

Hi, know a lil about electronics and electrical just want to make sure i'm not being a dummy or if there are any other better alternatives. Problem: A timed output circuit has gone bang on an piece of work equipment, wont go into detail as it may confuse the situation but it all works apart form the timed lamp button, I can see components on the lamp circuit disintegrated etc... So I wish to make the lamp part sort of stand alone. plan is to convert a 230v suply down to 12v 5a as the lamp it needs to power is 50w. Resolution: I was going to get this https://www.amazon.co.uk/200-250V-Halogen-Light-Electronic-Transformer/dp/B00CXK30UW and http://www.ebay.co.uk/itm/DC-5V-12V-24V-Infinite-Loop-Cycle-Timing-Timer-Time-Delay-Relay-ON-OFF-Module-/192106941494 Build accordingly and place in a project box with a push button on the project box also. Can anyone see any issues with this? Or am I complicating it, maybe the transformer then this? http://www.ebay.co.uk/itm/CAR-TIMER-SWITCH-TIME-RELAY-DELAY-OFF-CAR-LIGHTS-UNIVERSAL-KIT-1-105s-10A-12V/271203168131?var=570157183343&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D46150%26meid%3D5e8c43f27aec4c1092baed675673ef1f%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D280890951562&_trksid=p2047675.c100005.m1851 or http://www.12voltplanet.co.uk/12v-universal-interior-light-delay-timer-relay-10-sec-delay.html any alternatives? advice?

Posted by TerryJ31 9 months ago


Simple timed LED?

I need a way to turn on an LED after a certain amount of time (e.g. 5 minutes) then keep it on until a momentary switch is pressed. a very low power consumption if possible, because it's going to be wrist mounted. thanks in advance

Asked by DrVonTrap 7 years ago


Countdown timer doesn't exit and the loop never repeats?

We want to run the stepper motor by 180 degrees and want to repeat it after long delay (say 2 hours or so) with a countdown timer displayed in LCD attached to Arduino. Every thing happening successfully except the loop doesn't start after the countdown ends. #include #include const int stepsPerRevolution = 200;  // change this to fit the number of steps per revolution // for your motor // initialize the stepper library on pins 8 through 11: Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11); // initialize the library with the numbers of the interface pins LiquidCrystal lcd(7, 6, 5, 4, 3, 2); int hours = 0; // start hours int minutes = 0; //start min int seconds = 10; //start seconds int stepCount = 0;         // number of steps the motor has taken void setup() {   // initialize the serial port:   Serial.begin(9600);   pinMode(13, OUTPUT);   // set up the LCD's number of columns and rows:   lcd.begin(16, 2);   // Print a message to the LCD. } void loop() {   // set the cursor to column 0, line 0   // (note: line 0 is the first row, since counting begins with 0):   lcd.setCursor(0, 0);   lcd.print("DRUM ROTAING");   for (int i = 0; i     // step one step:     myStepper.step(1);     Serial.print("steps:");     Serial.println(stepCount);     stepCount++;     delay(125);   }   lcd.clear();   lcd.setCursor(0, 0);   lcd.begin(16, 2);   lcd.print("Count Down Timer ");   delay(150);   while (hours > 0 || minutes > 0 || seconds >= 0) {     lcd.setCursor(4, 2);     (hours     lcd.print(hours);     lcd.print(":");     (minutes     lcd.print(minutes);     lcd.print(":");     (seconds     lcd.print(seconds);     lcd.display();     stepDown();     delay(1000);   } } void stepDown() {   if (seconds > 0) {     seconds -= 1;   } else {     if (minutes > 0) {       seconds = 59;       minutes -= 1;     } else {       if (hours > 0) {         seconds = 59;         minutes = 59;         hours -= 1;       } else {               }     }   } } We used break, return 0, continue, etc. but somehow didn't work. Kindly tell how to exit so that program repeats itself. Thanks.

Asked by meetshivam 1 year ago


NASA style outdoor countdown clock

My problem;  as a father of two young girls, for years I have joked about getting NASA's countdown clock and placing it on our yard when they begin to date.  And start cleaning my largest guns when the clock hits @ 15 minutes or so.  Originally I thought this would be cost prohibitive- I mean, the thing is huge, and they used tax dollars to pay for it, so how cheap could it be?  Reading online about it today, I see it's been in use since the Apollo days, and it uses 40 watt bulbs, so I'm thinking (pardon the pun here), it can't be rocket science.  I don't need this to be in scale, but Id like something view able from the street, rather than a kitchen timer kind of thing.  And while I'm handy with a skill saw, I'm more of a car guy than a computer geek, so I don't even know where to start.  Ideally, I guess Id like the numbers somewhere around 12" or so, maybe larger.  Any thoughts, or experience?  The oldest starts dating in less than a week... 

Posted by Mr.Camaro 7 years ago


Help! -I need a timed cigarette dispenser - seriously

Have tried everything to give up smoking and failed, so a neighbor offered to give me 1 cigarette every 4 hours so I can cut back. Now she is going out of town and I really need a machine to do this job. Can anyone come up with a relatively inexpensive machine that can be built by an amateur like me? I would be grateful for any help.

Posted by diane4m 10 years ago


Need help with simple counter circuit design Answered

I am a newbie interested in building a circuit that can count the number of times a voltage level exceeds 2 volts.  Long story but I have an EMG device that will output 2 volts once a threshold is exceeded.  There is no way to automatically capture the number of times this happens.  Can anyone point me to a project kit that I could purchase or to a circuit with a component list that I could build?  I am fairly new so hopefully this circuit would not be too complex.  While not critical if it is also possible to capture the average duration the level stayed above 2 volts that would be great.  Understanding that this may complicate things beyond my ability the simple counter without duration would suffice.  Thanks.?

Asked by fsudal 6 years ago


555 timers?

I was wondering if there is a difference between a ne555p timer chip and a ne555d timer chip, and if there is then what is it? if there is a difference between them, then where can i buy a ne555p timer in australia? :)

Asked by jcolefran 8 years ago


wrist timer

Can anyone build me a wrist countdown timer? PM for details

Posted by gio_13 9 months ago


How to make a game timer with 3 timer settings (1min, 45sec, 30sec) that will also buzz when the time is up?

I know nothing about circuitry and am trying to make this simple timer for a game idea that I want to produce. Instructions on how to build this or directions on who I could talk to about getting this mass produced would be great! I appreciate any help. 

Asked by AndrewR259 1 year ago


Need help with wires and 12 volt timer

Need some step by step help. I have a 12 volt timer  I need to know how to connect the wires. What tabs to use and how to connect to the timer. I am a novice but trying hard to figure this out. The timer is for our RV frig btw.

Asked by mphillips13 5 years ago


Electronic timer circuit.

I have a 9vdc supplying 3ma constant current. I wish to switch polarity automatically every 5 minutes with a timer. How can I do that simply?

Asked by rhhince 8 years ago