How to replace mini microphone with more sensitive mic?

Hi I am trying to replace mini microphone (is very similar to mobile phone microphone) of Audio bug with more sensitive Standard electret microphone with intention that it pickup sound from more than 1 metre distance, and in doing so I am getting too much noise in Audio bug out-put. Do I need pre-amp? Is there any better way to do it? If pre-amp then how to harmonise out put of pre-amp to the input of audio bug? Any help..... Thank you.

Posted by ksaus 7 years ago


How can I make a microphone less sensitive?

I have these microphones for a project I am working on, but they are much too sensitive. Can I put some resistors with them to make them not so sensitive? I basically want them to record only what they are aimed at.

Posted by l0cke 10 years ago


Electronic touch sensitive panels

I am somewhat new to electronics and want to make a set of touch sensitive panels that light up quickly and dim slower.I plan on puting them right next to each other so that a can drag my finger across them.I was thinking to build a circuit for each panel, That lights an led upon touch, so the parts for the circuit need to be cheaper. I also need an opaque or clear material that you can see an led light up from under and that is conductive. If you've got any ideas then please share them.

Asked by Jgniklu 6 years ago


Which would be better for storing sensitive information in an iPhone App, Core Data or SQLite?

I am making an app that involves sensitive information.  Which is more secure?

Asked by drmjj55 6 years ago


having some issues with a touch sensitive switch. ideas?

So a little while ago i had put together a circuit for a touch sensitive switch based off the 555. it works great, it senses when i touch it and operates an optocoupler from that. the issue is it senses when i touch anything electrically connected to it. im currently using a power brick to power it (supplying 5v and 12v, the switch is part of a lerger project) and if i touch anything thats connected to ground the switch activates. the part that confuses me is that theres no ground plug, just the two main AC wires. Somehow its sensing through one of those wires as well, and when capitance builds up elsewhere in the system the switch activates. as far as i know the only way for me to isolate the switch is to power it using batteries. is there any way to power it still using the power supply without it sensing things other than me touching it?

Asked by zack247 6 years ago


Remote motion-sensitive alert light

I've searched these forums and found some similar threads but nothing specifically like what I'm trying to do. First, I am NOT very DIY savvy. I'm a computer tech and can build a PC from components, but I'm not a drilling, wiring, woodworking type. What I'm trying to make is a small remote motion-sensitive light so that when the motion sensor trips, a small under-cabinet style LED light will come on or just flash a couple of times. I want to be alerted when someone comes to the front door, even if they don't knock. USPS for instance leave packages without knocking and I may not know anything's there until I happen to go outside an hour or two later. Would rather get an immediate notice that someone is there without the expense of a CCTV setup. Any help or guidance on components would be appreciated. Battery powered is fine, and preferably something wireless if possible so I don't need to put holes in my walls. Thanks!

Posted by deitner 8 years ago


555 monostable sensitivity?

Has anyone built a 555 monostable circuit that was extremely sensitive for no apparent reason? I'm trying to use one in a rube-goldburg machine, and for some reason it's extremely sensitive to any sort of touch! The circuit sometimes comes on for no apparent reason, other times it will stay on for longer than the expected duration after the button is pushed. I'm using non-CMOS 555 on about 5 volts to run a small LED. The capacitor I used was a 0.01 uF on pin 1 to 5, and a 1 uF electrolytic on pin 1 to 6. I used a 1M resistor on pin 7 to 8.  I'm simply baffled by it. I've tried using different breadboards, different PSUs, brand new components, and correct gauge wire, but despite everything being seemingly fine, it's still shows the sensitivity. Anyone have any advice?

Asked by tylervitale 5 years ago


I need help hacking a solar light to use as light switch.

I recently bought some hanging multicolored led lights (they look like UFOs). They use 3 "C" style batteries as their power source. What I would like to do is make them light sensitive. Basically letting them turn themselves on when it gets dark. If anyone has any ideas on how to do this, your help would be greatly appreciated. I'll try and post some pics of them later today.

Posted by taz313 7 years ago


LED sound sensitive Equaliser. How to do it?

I have this idea for a house project. I want to build a LED sound equaliser that would spread on an area of up to 40x80 cm. That would imply LED positioned at a distance of 4cm one of each other; 20 columns of 10 leads each.  I would then like to cover each separate coloured led with an opaque plastic square to give the panel the grid-like look that an equaliser has, panels that will illuminate with different colours due to the light coming from the LEDs underneath them. This (the finished panel) would go positioned under a the glass from a coffee table, giving it a rather nifty look when the music it`s playing (almost all the time).   I know what i want to do with the actual table, but i dont really know where to start with the LED panel (done some amateur electronics a long time ago, but i could say i`m at the low novice level).  Would that even be possible, having to connect 200 leds at the same time? Please let me know if there are any projects that could help me (regarding the circuit/ power supply/ recommended LEDs), and share with me any of your ideas that could help me reach my goal.

Asked by AlexandruF6 2 years ago


Is it possible to use Piezoelectric sensors to measure weight, like a hypersensitive set of scales?

If Piezo is not appropriate in this case, which would be the best technology / method of weighing to use? I want to create a a hypersensitive set of scales which read up to 1 kg of total weight. But I want to create it as flat and flexible as possible. The footprint would be roughly 115 x 55 mm and be used to measure the weights of small foods for the prupose dieting, can anyone help me?

Asked by oscarpf 6 years ago


Light Sensitive Chicken Coop Door

Hi, I recently started keeping my own chickens and have really enjoyed the whole experience. The chickens were all really friendly and provided hours of amusement. Until a few weeks ago I had 4 of our feather friends in a nice Coop. That was fine until one night, for the first time ever, we forgot to close the door to the coop. Unfortunatley the fantastic Mr Fox must have been casing the joint for some time and siezed his opportunity. Three of the chickens were nowhere to be seen, the fourth lay dead under our rhubarb. So why am I telling you all this sad tale? well, I have stumbled accross a solution to this ever happening again. On Ebay I can purchase a 'VSB Automatic door opener', but it'll cost about £100. This is also not ideal as by current door for the coop opens horizontally not vertically, which would mean replacing the door. I'm also concerned that the light unit will be underneath a roof with this design, so it may close prematurely, leaving the chickens trapped in the yard. I'd like to have a go at making my own automatic closer for the coop, possibly solar powered (with a rechargeable battery) that could be mounted to the side of the coop. I don't mind adapting the door to make a vertical opener, if that makes the project easier. The specs for the bought units are: Compact geared motor with steel gears ensuring extremely long life. Battery life now 3 to 4 years with an HS sliding gate or 2 years with a 1.5-kg sliding gate featuring a 50-cm lift. Dorkeeper operates considerably more quietly now. Thanks to 40-kg breaking strength, the rope can hardly break any more. Electronic shutdown of motor within one second when the sliding gate is blocked.Once the blockage is removed, the sliding gate will be opened within three minutes. The strain on the batteries is virtually negligible. Tensile force: 200 g to to 3 kg, with idler UR on the sliding gate (pulley) 6 kg. Does anyone have an ideas how to make something suitable/similar? I have included photo's of the coop showin the current method for closing (Metal foding arm)

Posted by Nemesis201077 9 years ago


Touch Sensitive counter project question

Hi everyone, Great to be part of this community. I am trying to make a touch sensitive counter, the sensor has to be as flat as possible, something like a thick cardboard, or I can put a flat sensor in between two sheets. It needs to handle about 10-20lbs of weight. It will go under fabric like carpet, so it cannot be super sensitive, clickable is fine. It will be connected to a very simple 1 or 2 digit counter. Any suggestions? PS: Eventually I'd like to upgrade this with a system that can instruct something else, for example 5 counters, display etc. Or be able to use bluetooth or wifi or arduino, and be able to count back. For example input 10 and it will count 1/10, 2/10, 3/10, etc..

Posted by tees_deney 2 years ago


FSR - Conductive foam readings

Hello! I am making a prototype of a force sensitive resistor, and i am using, to old 97%kobber coins, metal sheet and a tiny piece of conductive foam that i got from a tv-repair shop. The setup is not very good, but its a start, and i am planning the next move for better results... Now... I want some decent understanding of how the readings work, and why I get these results.. First test, are written with black, and and as you can see it, has the same amount of space between 0-1kg and 1-2kg, but 2-3 and 3-4 changes to a very small space? Why is that? Second question is, that i have used the x10, to read larger forces. 0-2,5kg and 2,5-5kg has same amount of space. Will the space decrease too, when getting further up the scale too?  - I know the conductive foam has its limits too, but just to be clear of my readings. Thanks in advance! I hope you can see the readings on the picture..!

Posted by L33boy 3 years ago


What transistor should I use for a touch-sensitive switch?

I would like to run a 5v green laser diode off 4v (because it is easy to blow at 5v) using a touch-sensitive switch. I hope to use the switch with a thin layer of plastic in front but if the current from a human cannot pass through to activate the switch then I'll leave that feature. Anyway, I would like to know what Darlington transistor or regular transistors (to make a Darlington pair) to use that will operate the laser diode momentarily and safely. Thanks, Jim The link to the laser diode: http://www.dealextreme.com/details.dx/sku.10094

Asked by pyro-jim 8 years ago


Need help to make my shirt vibrate!!!

I have a dream of having a shirt that vibrates when i hug people, i think it will be like a nice surprise when it happens. I have looked around and no body makes anything like this, none i can get at least. i have seen on here how to make little vibrating motors and thread pressure sensors but i have no clue how i would go about combining it all into a shirt. Really need someone to help me make this reality so if you think you can or know someone who can please contact me!

Posted by jaraiza8 6 years ago


ESD sensitivity of a VFD/LCD module? Answered

I have seen images of people experimenting with these modules but in the datasheets it says that they are sensitive to electrostatic discharge, is there a way of protecting them without cases (to use them for experimenting with micro controllers)  would zener diodes on the inputs and power supply make them less sensitive, or is it a overstressed problem to cover the manufacturer?

Asked by 12V 7 years ago


Is there any way to make a touch sensitive switch using an OP Amp? Answered

I just saw an i'ble about making a touch sensitive switch. The problem was that it used 3 transistors, and I wondered if there was any way to make one using only an OP Amp. Thanks.

Asked by arhodes18 8 years ago


des leds qui réagissent au son mais système non branché directement à la sortie du son

Bonjour tout le monde, j'aimerais de l'aide sur un projet qui me tient à coeur je suis passionné de diabolo, je pratique moi même et j'aurais aimé créer un kit lumineux à incorporer dans le diab et que les leds qui seraient dans ce kit  réagissent a une musique environnante ( une musique provenant d'une chaîne hifi par exemple ) et tout sa sans qu'il y ait de branchement qui viennet sur la chaine hifi. je voudrais que les leds régissent exactement cmome les leds dans le projet suivant: https://www.instructables.com/id/Music-LED-Light-Box/ mais sans fil qui sort du système et avec de composants petits pour que le système puisse rentrer dans les calottes de mon diabolo (idéal ce serait un circuit imprime qui fasse  10cm sur 10 cm max) i vous connaissez quelque information qui pourrait m'aider a mener a bien mon projet merci répondre sur ce topic je vous en serait reconnissant merci et bonne journée

Posted by hypolite 6 years ago



Making a sound intensity sensitive led? Answered

How to make a sound intensity sensitive led using Arduino UNO??I want the LED's brightness to be low at low intensity sounds and high at high intensity at high intensity sounds.Any idea on how to do it??

Asked by ankitkumarsahoo 6 months ago


i need a light and motion sensitive cat scaring device.

I need a noise making motion sensitive device that only works when there is no light. Thoughts: want to use a plug in (no batteries) light sensitive night light (these come on when it's dark) and have it power something that is a motion sensitive noise maker that would scare a cat.  the point being these would go in a bathroom and i only want them to be active if the lights are out. hopefully cheap as I need to make two of these. willing to rip apart toys or other electronics that are easy to get. Thanks for any advice

Asked by princew 7 years ago



How should I adjust my computer's mouse sensitivity/speed?

I have a razer deathadder mouse and was wondering, what should I use to adjust sensitivity/ speed of my mouse? Should I adjust the sensitivity in windows xp control panel, the razer drivers or in-game settings? And what should I set the ones I shouldn't adjust to? To the middle setting, the highest, or the lowest setting? Thanks

Asked by tudgeanator 8 years ago


How to increase the light sensitivity of a DARK SENSOR CIRCUIT?

I recently managed to replicate a dark sensor circuit using a LDR, a 220K & 330 ohms resistor, a BC547 transistor and a LED. But the problem is that it is very little sensitive to light. During daytime there is no problem but at night, under the CFL light it doesn't sense the light and turns on. To turn off the light, I have to illuminate the LDR with a external light source and that too very close. What I want is that the LED should light up only when there is complete darkness. How should I modify the circuit to increase the sensitivity?  The circuit diagram is as given below.

Asked by Arijit Chatterjee 4 years ago


Sensitive Motor?

Im looking for a small, no bigger than half a roll of quarters, dc motor that can be programmed to spin 50ths of a turn. it needs to have some power and not be super expensive, thanks for the help.

Asked by theboygenius 4 years ago



Microphone sensitivity range?

Can a normal microphone as present in most headsets detect noise levels below and/or  above human audible frequencies. And if so  is it possible to see the audio waveform for such noises using such a mic?

Asked by muhammajunaid 6 years ago


Ok, how the heck did they make this sweet water sensitive LED panel?

Http://www.thisiscolossal.com/2012/08/water-light-graffiti-a-moisture-sensitive-surface-embedded-with-leds-creates-illuminated-art/

Asked by prismspecs 5 years ago


Need 3A Touch Sensitive LED Dimmer circuit.LED voltage is 2.9-3.5,0.7-3A.?

Input should not more then 12volts it is better if circuit works on 5volts,but ON/OFF and dimming will be touch based.

Asked by Faizan Hamayun 6 years ago


how do i mod my xbox 360 with sound sensitive strobe LED's?

I have seen the xbox 360 LED mods where the color of the LED lights stay solid while the system is on. After going over the instructions carfully i saw a 360 console with sound sensitive strobes and i was wondering if there were different instuctions for the strobe or if it is the same process with different LED's

Asked by DEAD-26 9 years ago


i'm searching some high sensitive metal like mercury if you know some other please share ?

I'm searching some material in which a very heat can flow with out destroy  the metal

Asked by maheshs3 11 months ago



How can I change the sensitivity on a 360 controller for the pc?

I'm trying to play fps games (Marathon with the Aleph One game engine) on my computer using joytokey and a wired 360 controller. Unfortunately, the sensitivity is so high that by accidentally tapping one of the joysticks, the game responds much faster than i want it to. That, and the joysticks don't always go directly to the center, so after i press the joystick one way and I release it, the controller keeps going that way. It's really irritating, and i can't seem to figure it out. Thank you to all who read and respond.

Asked by 9 years ago


​Is ISO automatic in Apple phone-6 ? Answered

ISO means the International Standards Organization - who is the governing body that standardizes sensitivity ratings for camera sensors. The ISO adjusts the camera's sensitivity to light. Picture credit is Cdog2897

Asked by iceng 2 years ago


Touch Sensitive Floor Mats

I have one of those Halloween floor mats that when you step on them, it triggers a sensor that has it make a screaming noise. Is there anyway to hack this? It's annoying and I want to make use out of it.

Posted by thatjawn 10 years ago


4-wire touchscreen sensitivity

Hi team I posted this on the Arduino forum, and had a search through several electronics sites; perhaps there's also someone here who can suggest something. I have successfully hooked up my touchscreen to Max via Arduino; the code is fine, the circuit is fine and the Max patch is fine. I'm just wondering if it's possible to tweak the sensitivity of the entire circuit? When touching, one must press fairly firmly, otherwise any relaxation of touch, even with continued contact, results in a rapid fall to zero. In the Max patch, I'm using [sel 0]-> outR, after all the [serial] gubbins to help smooth some jitter. But is it possible to tweak the sensitivity, perhaps by using resistor values other than 10k. Hey, maybe even connect a variable resistor to allow realtime tweaks? Hmmm. Thanks Brendan

Posted by brendanmccloskey 7 years ago


Motion Sensitive Switch

I'm trying to come up with a switch that activates when it is moved. Ultimately it would connected to a sound device and a small sample would be played every time the unit is picked up. Any suggestions on how I should go about doing this?

Posted by hectma 10 years ago


how to make a metal detector sensor for high sensitivity

Hi everyone Could you please help me... : ( how to make a metal detector sensor for high sensitivity examples of metal objects the size of 1mm the use of these sensors for metal detection in food security

Posted by RickyS18 2 years ago


how to make a metal detector sensor with high sensitivity for a small metal object ?

How to make a  metal detector sensor with high sensitivity for a small object exampe size object metal 1mm     typically used for metal detection sensors on the safety of food for consumers

Asked by RickyS18 2 years ago



Is there a clear, heat sensitive spray glue?

Working on a project that I would like to fuse by heating it.  I want a clear spray.  I have found something called spraynbond which is for fabrics but I am not sure if it is clear or what it is made of (to make sure it won't damage something).  Any suggestions?

Asked by JosephH13 3 years ago


Will switching the 100k resistor for a 1meg resistor in the following schematic kill my battery life? Answered

Here is the schematic: http://forum.hackedgadgets.com/viewtopic.php?t=114I switched out the 100k resistor for a higher value resistor in order to make the photocell much more sensitive. 1meg was the first resistor that would keep my LED off in dim light. (I want the LED to power on only when it's "lights out." Will this kill my 9 volt battery? Is there a better method to make the photocell more sensitive?

Asked by erikp 9 years ago



Sensitive Accelerometer Chip

I've seen some projects that use accelerometer chips with arduinos to get readings (e.g. in MATLAB). I'm looking to do this but I'm going to be measuring very low amplitude, low frequency vibrations so, I imagine, the types of acceleromters I've seen used (e.g. the MMA7341L) won't be sensitive enough. Does anyone have a suggestion for which accelerometer would be appropriate (I know that MEMS are a popular brand - there's a list here: http://www.analog.com/en/mems-sensors/mems-accelerometers/products/index.html)  Many thanks for your time! Oli

Posted by ocheadle 3 years ago


Is it possible from a chlorophyl extract to use its photo-sensitive possibilities, and How?

I·d like to found how to make photo-sensitizer out of chlorophyl extract, or from micro-weeds, or other any organic like plancton, to replace the very toxic technics used in every photo-reproduction work

Asked by FeteLeToiMeme 8 years ago


How to replace mini microphone with more sensitive mic?

Hi I am trying to replace mini microphone (is very similar to mobile phone microphone) of Audio bug with more sensitive Standard electret microphone with intention that it pickup sound from more than 1 metre distance, and in doing so I am getting too much noise in Audio bug out-put. Do I need pre-amp? Is there any better way to do it? If pre-amp then how to harmonise out put of pre-amp to the input of audio bug? Any help..... Thank you.

Posted by ksaus 7 years ago


Force sensitive resistor plus LED plus battery. Will pressure on the FSR be able fade the LED brightness in and out?

I am trying to achieve a handheld firefly effect by using an LED that is controlled by the FSR in order to get the "firefly" light to fade in and out. Can someone give me an idea of how to set this up? Thanks!

Asked by ryanswiftjoyner 6 years ago


heat sensitive wall outlet

Does any one have or had plans for a wall plug outlet or an extension cord from a tool that would turn off if the temperature of the devise reached a preset degree.  i.e. your coffee machine operated normally but it caused the duplex plug to overheat and the circuit would shut down avoiding a possible fire condition. 

Posted by dano9999 1 year ago


Please how do I enable a level sensitive interrupt for my PIC on mikro c? Answered

In all the sites I have checked, its only the INTEDG command to enable  rising or falling edge interrupt. Please how can I enable a level triggered interrupt on my PIC18F14K22 with mikroc compiler? Thank you. 

Asked by ikechukwu.dimobi 3 years ago