4029 CMOS

I heard they are discontinuing the 4029B CMOS decimal counter, I know I haven't been able to find it anywhere recently. So my question is, is there a replacement for this chip? (CMOS)

Question by andy70707 8 years ago  |  last reply 8 years ago


CMOS Battery options

Can I replace the CMOS battery on my motherboard with a holder soldered in holding 2 aaa alkaline batteries instead of having to use CR2032 batteries? 

Topic by sctirvn687 2 years ago  |  last reply 2 years ago


Where is the CMOS battery in an HP xh485: mine is hiding and probably dead!?

The great old dinosaur died and symptoms are like a dead bios battery...but I can't find one, even after removing the bottom cover, the HD, KYBD, etc.

Question by buddy03 8 years ago  |  last reply 8 years ago


testing and fault in vlsi system?

How many type of fault can be occur in VlSI circuit ? when we make chip It may be work or it may be fail due to some fault chip may be fail due to fabrication process chip may be fail due to circuit connection chip may be fail due to packing how we will detect fault in chip and what is fault model in vlsi system?

Topic by vead 4 years ago


Can I use a CMOS part of optical mouse to control my PC?

Hi guys, I want to know if is possible to use a CMOS (part of optical mouse) to make a multi touch screen or similar DIY device to control the pc. The CMOS can be like a IR sensor over my PC monitor. Tks

Question by sidjunior00 9 years ago  |  last reply 6 years ago


i need to interface a cmos camera with an arduino. Can anybody help me out ????

Later part of the project would include live streaming of the camera input, or probably  some image processing of the same.

Question by anurag173 6 years ago  |  last reply 6 years ago


analogue-digital cmos chips? Answered

Is there a chip like the LM3914 that takes an analogue voltage input and turns it into a digital signal? (preferably BCD, but decimal is fine too), but without the inverting output, so I can use it with other CMOS chips? I basically just want a chip that takes an analogue signal, and based on a threshold, divides it up into a decimal (or binary) signal. Specifically, I want to use it with a thermistor and a 7-segment display to make a digital thermometer.

Question by andy70707 7 years ago  |  last reply 7 years ago


How do I determine if my computer's CMOS is totally fried? Answered

Yesterday I got a call from my wife that she was bringing the computer back up (there had been a storm and she SAI(D she shut everything down normally and unplugged everything),  and she has this "message" that CMOS had failed and was loading default......press F1 to continue or F2 for set up. Sadly, neither option actually works.  It  "sounds" like it is processing (looping?) but nothing happens.   Turning it off, waiting and back on again produces the same results and it doesn't get far enough into the boot process to access either the CD or the HD. Give it to me straight....it's brain dead, right?

Question by Goodhart 6 years ago  |  last reply 6 years ago


can a "ion generator" from an air purifier cause a lot static and damage any nearby cmos?

Could something like this http://www.goldmine-elec-products.com/prodinfo.asp?number=G1783 adversely affect cmos chips when being used or stored?  

Question by the judge 9 years ago  |  last reply 9 years ago


Blue led photography...

I just took some new pictures for my BraceLED 2.0 I'ble. And look at the picture of the bracelet with the blue LED's! The reflection of the blue light on the white surface (=paper sheet) is highly overexposed! How does this happen? Is the cmos sensor in my Nikon D300s over-sensitive to this color of blue? A picture of a red-led-bracelet under (almost) the same conditions has no such effect. Picture red BraceLED: iso800, 35 mm prime, f/4, 1/20 Picture blue BraceLED: iso800, 35 mm prime lens, 1/15

Topic by ynze 8 years ago  |  last reply 8 years ago


What does this chip actually do? Answered

Its labeled MACH210-15JC-18JI I've looked over the data sheet, and it says: 44 Pins 64 Macrocells Peripheral Component Interconnect (PCI) compliant 32 Outputs 64 Flip-flops; 2 clock choices 4 “PAL22V16” blocks with buried macrocells So, it holds data bits with flip flops? In the specs it says D or T type flip flop. Its programmable, but what does it mean by that, how would you "program it" it has 44 pins, and some I/O. What do you think the applications of it are? I have the pinout, but that doesn't really do any good if I can't figure out how to "program it"... It can run at 133MHz tops, but if this was memory there would need to be a section that says when to read/write on rising or falling edge of said clock. It doesn't say that. EDIT: So.. what does High-Density EE CMOS Programmable Logic mean? Sorry for the questions lately, just trying to figure stuff out

Question by Mudbud 6 years ago  |  last reply 6 years ago


A combination of PROM that takes 16 bit as an input address and when combined with multiple PROMs, gives 18 bits output? Answered

Hey I've been working on a project and have hit a road block. I specifically have 16 bits of addressing which gives 65535 possible addresses, I need to use all of these for reading out data in a PROM that has an output of 18 bits per word, per address I guess you could say. The only problem is that I can't find anything like that.. Or haven't searched hard enough? Now I could probable use multiple PROMs, just feed the same address to each PROM and I would just bring the outputs together as an entire output instead of multiple outputs. What I'm really looking for is a PROM that takes in a 16 bit address for input... But I can't find the right combination to get 18 bits because they come in 8 bit words or 4 bit..

Question by Mudbud 5 years ago  |  last reply 5 years ago


what does this cd4011be chip do?

On the datasheet it says its a CMOS NAND GATE, what does it do and what do i use it for? http://pdf1.alldatasheet.com/datasheet-pdf/view/113449/TI/CD4011BE.html  <<Datasheet

Question by zack247 8 years ago  |  last reply 6 years ago


How to change CMOS to CCD on a DSLR. I'm adamant this is possible.?

There are many pros and cons to both CMOS and CCD respectively, but I'd like to experiment with the two anyway, involving hacking a DSLR camera, which hosts a CMOS image sensor (which uses rolling shutter) and changing this to a CCD (which is an instant shutter). As well as the technical changes, would there be other things to consider, like programming within the DSLR?

Question by spreaddapoo 6 years ago  |  last reply 6 years ago


CMOS vs TTL? Which Is Better? Answered

What are the main differences between CMOS (Complementary Metal-Oxide-Semiconductor) and TTL (Transistor-Transistor-Logic). The things I want to know: Which type do you use? Which kind do you prefer? Which type do today's computers use? Are CMOS and TTL compatible? These are the few things I know about them: CMOS ICs (overall) will draw less current compared to TTL CMOS are less picky in regard to their voltage supply. It seems like most people like CMOS more than TTL. Thanks! Comments, answers, and everything else is appreciated!

Question by jensenr30 8 years ago  |  last reply 8 years ago


Dental Xay sensor from CCD/ CMOS digital sensor.............. please post projects?

Cmos or CCD sensors for oral and dental xray please .......

Question by maildrsat 7 years ago  |  last reply 7 years ago


Blinky Geeky Tabletop Decoration with CMOS 74C14

I made this blinky geeky tabletop decoration based on my instructable over there: https://www.instructables.com/id/An-easy-to-make-cheap-and-simple-LED-blinky-circu/ have fun and share your ideas!

Topic by mischka 9 years ago  |  last reply 9 years ago


Is this CMO chip compatible with this one for hot swapping?

For those who may it concern, thanks if you can help.So, I have recently found another CMO chip, one strangely on an old modem + audio card, and I want to use it use it on an motherboard I'm going to flash (fear of failure, so I'm going to hot swap with another one it if I can). I'm not an professional in chips, so I'd like to see if anyone can help me out here.Here is the two CMO chips (both are 32 pin PDIP):On the card: AM29F010-90PChttp://www.datasheetcatalog.org/datasheet/AdvancedMicroDevices/mXxzrq.pdfAnd on motherboard: SST29EE020http://www.ourchip.com/NZILIAO/chips/memory/29EE020.pdfThe motherboard using: GA-6BXChttp://www.gigabyte.com.tw/Products/Motherboard/Products_Spec.aspx?ProductID=1445The only slight difference I've had notice is that the card one had 1MB of memory and pin 30 is not used, while the other is 2MB of memory and does use pin 30. The BIOS awards, updated to the current beta version, and as well I think 1MB is enough room for the flashing (I hope).

Question by BIO Wolf 9 years ago  |  last reply 9 years ago


Do I need to protect my 4024 if I'm using a 555 for the clock signal

If I am using a 555 timer IC in astable mode at a running speed of about 1hz at 9 volt and pin number 3 (output) will be connected to a CMOS 4000 serie counter, (MC14024BCP package), do I need a resistor on the output of the 555 to protect the 4024 or it's ok and the 4024 will draw exactly what it need for his input?

Topic by sxdemon 9 years ago


Cheapest DIP glue logic?

I am looking to by some glue logic chips to prototype in so they must be in dip packages. I also want them to be cmos chips and not ttl. I am looking for which family of logic is the cheapest and for a good place to by them on the cheap. I don't care about the specs that much in terms of speed by I would hope for 5V and the ability to supply 15mA or more. The reason I am asking instead of finding the answers for myself is that I have already tried looking but there seem to be so many families that are very similar and I cant come to a conclusion. Ii was hoping that somebody who had some experience working with them would have some insight into me question.

Question by seanroberts 8 years ago  |  last reply 8 years ago


How can I convert my 35mm Film SLR Camera to a Digital SLR camera? Answered

I Have an old SLR camera in excellant condition. It requires 35mm film. I want to convert in into a Digital camera. How Can I do that? Can I use sort of CMOS sensor at the place of film? Please help me!

Question by sarveshk 8 years ago  |  last reply 2 years ago


Can I replace/modify the Vado HD's internal mic?

I just got a new pocket camcorder; the Vado HD. It's the second generation, which means it has no input jack for an external mic. Could I pop the camcorder open, remove the internal mic and solder on an audio input jack in its place? would there be consequences?

Question by magnum-colossus 8 years ago  |  last reply 7 years ago


Disk boot error? Answered

Last night, I wanted some files off my laptop drive, so I stuck it in an external enclosure and plugged it into my desktop (whilst on). I then turned off the desktop without unplugging my laptop drive and turned it on again today, forgetting to unplug it. I have USB booting enabled, so it tried to boot from the laptop drive and as I was out of the room when it was booting, it entered the recovery partition as the hardware is incompatible. I have done this before, so I just turned off my computer, unplugged the drive, and restarted. Instead of booting from my primary internal drive, it got stuck on the post screen. It detected it, but wouldn't go any further. I then thought that it was still looking for the USB drive, so changed the boot order and removed usb boot, same problem. Removing my primary drive just returned the error "disk boot error, insert boot drive and press enter to continue", so I inserted the primary hard drive (I have it in a hot-swap bay, so it can easily be removed, although being my primary hard drive, not "hot"). After doing so, it kept returning a similar error. I then figured that it was still looking for my laptop drive as a primary boot device, so I cleared CMOS with the jumper and after setting it up again, disabling every other bootable interface except the sata port my primary drive is connected to, and it still just gets stuck on post. I have left it about 10 mins and still get the same problem. It is also hard to enter BIOS or any of the other utilities, as it waits until after post, so I have to either remove all drives or insert the laptop drive in it's enclosure. How can I get my desktop to boot from the primary hard drive again? Inserting the install disk is also hard, because I don't actually have a DVD drive yet, so I installed Windows 7 extended trial through a memory stick from my laptop with a disk drive. I have since deleted it off my memory stick, and my laptop is now in pieces hooked up to my monitor/keyboard/mouse instead of my desktop. It is on it's back and the hard drive bay is open in case I need it again. My BIOS is award with additional features on a Gigabyte GA-H55M-USB3 board. Both drives are Hitachi sata-II drives, one being 3.5" and one being 2.5".

Question by andy70707 7 years ago  |  last reply 7 years ago


Hard drive wiping problems REFRASED

 Hi, I posted another question on the same topic, but I don't think I got my point across. I'll lay down the basics - Is there any way to erase a hard drive WITHOUT having to boot from a cd (like dban or the windows xp install cd) and WITHOUT having to access the accounts. My computer is so corrupt, I can't do either. Don't tell me what I could check to make it work, just answer the question. No, I don't want to take the hard drive out and use another computer to erase it. I do know that I would need the XP disk to reinstall it, but I would need that if I weren't going to install Ubuntu instead. Yes, I tried booting from the ubuntu disk, it didn't work. Also, don't say "well, you're out of luck, take it into a repair shop." That's NOT answering the question. Thanks in advance.

Question by guitarmonk15 9 years ago  |  last reply 7 years ago


Substitute for priority encoder? Answered

Hey,     My project requires the implementation of a priority encoder.All the other gates that form the remaining circuitry are CMOS whereas the only priority encoder that is available to me,is a 74ls147 which uses TTL.The part where TTL interlinks with CMOS turns out to be extremely finicky and doesn't seem to work after several failed attempts using transistors in between and powering the CMOS chips with voltages such that the 'high' voltage was the same for both TTL and CMOS.The only option I had was to go for an ic (don't remember the part number) that acts as a portal between CMOS and TTL .But that would mean an additional ic  and so,I figured that I could probably develop my own version of a priority encoder(sort of..because it's not exactly a 'PRIORITY' encoder) with a quad 2 input xor gate and a triple 3 input or gate ics,tailored specifically to meet the needs of my project.I haven't tested it on breadboard yet and would like to know your opinion.The circuit diagram and the truth table has been attached as a picture. Thanks for spending your valuable time to read my question :D

Question by Adarsh_tronix 3 years ago  |  last reply 3 years ago


how to build video recording module?

How to build a custom video recording module for cmos sensor with microsd storage.

Question by kmohan 7 years ago  |  last reply 7 years ago


i put a tape deck on a power supply of a computer but after each unplug i loose the clock?

If i plug a motherboard with a battery cmos will it  work?

Question by dante900 8 years ago  |  last reply 8 years ago


555 Am Transmitter Circuit Diagrams?

I have two ICM7555 CMOS 555 timers, and I was wondering if anyone has any good am radio transmitter circuits that incorporate two (or one!) 555 timers.?

Question by BurningSandman 8 years ago  |  last reply 6 years ago


Need a good digital project

I just finished making a digital clock on a 5x8 board using just basic CMOS chips. Does anyone have a reommemdation for another digital project? I'd like to keep it comprised ofmcmos or basic chips for now.

Topic by Mattosx 6 years ago


Can't remember the bios password Toshiba satellite laptop C75D-A7286

I have a Toshiba satellite laptop C75D-A7286 that i have forgot the bios password. I have tried the Esc and F2 start up as well as taking out the cmos battery to no avail. Any ideas ?

Question by etcuts 1 year ago  |  last reply 1 year ago


Door's spy hole turn digital using an old camera

Hi, i have an obsolete digital camera 20 yo. and i was thinking to use it to replace my door's eye with a lcd display The old camera has all is needed: lens with cmos sensor to fit on the outside of the door and lcd display (a small one in my old camera) to fit on the inside; i haven't disassembled the camera yet and i am not sure about the diameter of the lens and cmos sensor; of course i do not want to drilll a bigger hole in my expensive door! do you have any exprerience? Regarding power supply, my camera use 4 AA batteries but i could replace them with a 18650 battery and a small step up converter

Topic by m_a_x 4 years ago  |  last reply 4 years ago


What are motherboard pin connectors called? Answered

What is the trade name of those grouped pin posts you see on motherboards - the ones you set CMOS settings with using jumpers.... The kind that the front USB cable plugs into. Under what name can that be looked up commercially, say, in a parts catalog?

Question by Cheyyne 10 years ago  |  last reply 10 years ago


74hc193 equivalent? Answered

Dear All. I have an schema circuit 74193 divider frequency to N (2 to 15) without using  other component .But my regional haven't sale 74193 . So please help me to known  what the chip CD4520 - CD4510- CD4029- CD40193  or other IC  can instead of 74193 (TTL  or CMOS don't matter). Thank you in advance for your time.                                                    Best regards

Question by lam.huuminh.3 3 years ago  |  last reply 3 years ago


how do i remove the bios password?

Someone gave me a laptop but there is a password on the bios so i cannot go in and re-enable the wifi card, any ways of removing the bios password without killing the laptop? (i know you can remove the cmos battery but i will only use as last resort) laptop is acer aspire 3680  -2917  thanks!

Question by pbergeronronronron 7 years ago  |  last reply 7 years ago


USB hub only 1.1 compatible? Answered

Hi, After looking at this USB hub microcontroller page I saw a part where it said this "The TUSB2077A hub is a 3.3-V CMOS device that provides up to seven downstream ports in compliance with the USB version 1.1 specification"Does that mean it's only USB 1.1 compatible?

Question by thermoelectric 9 years ago  |  last reply 9 years ago


Oscillator with AND and NOT gates? Answered

Hi, I've been recently working with logic gates and that's when this struck me.If an AND gate and an inverter are hooked up as per the attached schematic, can point A function as an oscillator?Assume that the gate inputs float high. If so 1)What would be the frequencies of the oscillations if the gates used are a)CMOS b)TTL ? 2)Would the frequency change with the input voltage ? 3)Is this implemented elsewhere? Thank you for reading my question.

Question by Adarsh_tronix 4 years ago  |  last reply 4 years ago


Indefinite capture on PC camera?

I got a cheap usb PC Camera but I need a way of getting indefinite capture, as in I need it to keep the shutter open (it uses a cmos visual detector not shutters). How would I do that? I was using a software I downloaded free from the internet. setting a really slow frame rate doesn't work for this. What software should I use, and what would I need to do to get the indefinite capture?

Question by Higgs Boson 7 years ago  |  last reply 7 years ago


How to use AT28C64B? Answered

I am making an 8-Bit Computer for a science fair project. I have everything working, but there is one problem. Everything action has to be done manually. It could work this way but I want to be able to write a program, press a button, and the computer will do the rest. To do this I have to use a control matrix to control the Input/output of each device to the bus. To do this I will use an EEPROM. However, I am using TTL logic and the AT28C64B is CMOS, but it has TTL and CMOS logic compatible Inputs and Outputs. When I programed it, I did WE low OE high and CE low. When I read from it I had WE high, OE low and CE low. When I had CE plugged into nothing which I think is High-Z, I noticed just a brightness difference between 0 and 1 on the LEDs. When I plugged the Chip Enable(CE) into ground it made every LED the same brightness so that you could not tell the difference. For my TTL logic I need either voltage or ground to control 1 or 0. Am I doing something wrong? Please help me! I really need the help.

Question by BeauH3 2 years ago  |  last reply 2 years ago


robot control via internet and shield gsm

Hello from tunisia could you please help me a little bit about my final project fo study i wanna control a robot using a gsm/gprs shield arduino and a arduino mega 2560 card. i wanna make a webpage that control the robot via internet using the sim card inside the robt. do you have anyidea how to do it . is it possible that the robot send pictures capture of the camera ov 7670 cmos  to the web page . thank you

Topic by joujou_tunisien 5 years ago


Computer update......disassembled....

My computer has bit the dust (more than I expected when I opened it up), and the CMOS is completely fried...so I have disassembled it and am on the older yet, computer - another Gateway, single threaded CPU and the only port it recognizes on my DSL modem is the USB port......slowing it down EVEN FURTHER.    Time to go into debt again for a new one.....*sigh*.   But this is why I haven't been around quite as much as I normally am. 

Topic by Goodhart 6 years ago  |  last reply 6 years ago


Wireless Face Recognition Final year project? Need Help at the wireless part ?

Were using open cv for the face recognition part and we need a wireless interface between the computer and image acquisition device.  we originally planned on using matlab for the face recognition part but decided to stick with open cv ...... For the image acquisition device we wanted to make a bluetooth camera using a cmos camera and bluetooth modules . I need a suggestion if the project is possible and how to interface the system . Thanks  

Question by khowsrow 6 years ago  |  last reply 6 years ago


robot control via internet and shield gsm

Hello from tunisia could you please help me a little bit about my final project fo study i wanna control a robot using a gsm/gprs shield arduino and a arduino mega 2560 card. i wanna make a webpage that control the robot via internet using the sim card inside the robt. do you have anyidea how to do it . is it possible that the robot send pictures capture of the camera ov 7670 cmos  to the web page . thank you

Topic by joujou_tunisien 5 years ago  |  last reply 5 years ago


Flexible EL Display, Recirculating Gravy Fountain, USB Nintendo Gamepad

Flexible Electroluminescent Display Recirculating Gravy Fountain USB NES Gamepad Easy Backpacking Stove Spiced Pumpkin Cheesecake Letter from the Editor Glowing LED Tube DIY Thanksgiving Enter the RM 100 Contest Inner Tube Skull Purse Around the Room Marble Track Electronic Beehive Scale Xbox Kinect TV Mount DIY CMOS RAM Memory Guitar Neck Repair Blender Fish Tank Bottle Cap Antenna Protector Instructables.com - 82 2nd St. - San Francisco, CA

Topic by randofo 8 years ago


What's wrong with this wiring?

I've finally decided to undergo my first real electronics project - building a quad-NAND synth ( as per http://www.misusage.org/wordpress/?p=23 ). It's basically a simple oscillator run through each NAND gate of a 4000 series CMOS IC, fed into each other for manipulation. This is also my first time actually translating schematics to a breadboard, which I've attempted haphazardly - see my attached image. My questions are the following: How many errors have I run into? If I were to test this oscillator, how would I go about installing the audio jack? Am I grounding this correctly? Thanks!

Question by cshields1 7 years ago  |  last reply 7 years ago


74LS147N 10:4 priority encoder not working... Answered

Hi,    This is a follow up of this question- https://www.instructables.com/answers/Logic-circuit-to-generate-and-convert-3-bits-paral/ I set all the 10 inputs of the encoder high and was expecting to see all the 4 outputs give a high(4 LEDs were connected to the outputs to see this happen).But that wasn't the case and just 2 of the LEDs glowed.I tried different configurations on the inputs but all the time it was either these two LEDs that glowed or none .Can this ic power 4 LEDs directly from its outputs? Could I have wrecked the ic? Something a bit off the topic- What should I keep in mind while mixing TTL and CMOS logic gates? I powered the ic with 5 volts.

Question by Adarsh_tronix 3 years ago  |  last reply 3 years ago


My computer isn't working, anyone know why? Answered

 I would like to know this for informational purposes next time I open up my PC just to fix a few hardware problems. One of the RAM chips on my PC didn't want to work, so I decided to open it up and clean the contacts (which were covered in enough dirt to stop all connections). So I did so, and when I put it all back in and booted it up, all I see on my LCD screen was nothing, absolutely nothing. I tried reseating the video card. I tried reseating the RAM chips. The only thing I didn't try was to clear the CMOS memory, but I was afraid it would make things worse since I have a tendency to touch other components. For all I know it can't be the CMOS memory, but I can't be sure. I do know I accidentally touched the video card out of nowhere (no ESD). That video card I touched has a reputation of taking more than 10 attempts at it to make it work, so I might have moved the contacts out of place, so I reseated it. It still doesn't want to work. I do know that my dad knows the problem, so don't tell me to bring it to a computer repair shop which will raise the price needlessly anyway. According to the LED's at the front, the CPU is going at it. I just want to know what to do and what not to do (aside from the usual ground yourself, don't touch other components drill) so that I don't mess it all up all over again. I'll go have another shot at restarting this... Might be the cable from the monitor to the PC...

Question by nutsandbolts_64 8 years ago  |  last reply 8 years ago


How can I attach El wire to a PIC using an accelerometer as a switch?

I would like to use a PIC that would turn on the EL wire only when it is dark out via a small photocell. I would also like to incorporate an accelerometer that would detect when the person is walking or running (it is to go on shoes) as well as fade in and out. To turn it off to conserve battery power, I would like to incorporate a small switch so that when the person is home he can turn it off. Most of all, I would like to use 3 volts with a lithium ion cell or two AG13 batteries. I have wanted to use a CMOS 555 but it would make the circuit very complex very quickly which would make the circuit heavy and very uncomfortable to wear.

Question by blinkyblinky 7 years ago  |  last reply 7 years ago


3.7v LED driver

Hi guys how are ya doin? :DRecently I'm working on the next project, which is about battery powered bicycle led lamp. So in that case I want to use LED driver. Then I've founded this schematic with CMOS 555 timer, who runs more than 5 LEDs in series. Excited by this new found schematic, I bought the parts & connected them like so. Unfortunately, it turns out, it wont work. :/ At 3.7v they won't even light up, but at 5v they start to shine a little bit. I'm wondering do I need to put different transistor (in my case it was PN2222A - that's the one I had and its equivalent to 2N4401)? Or what the problem with this circuit.I would more than thankful for your help. :D

Topic by JohnSmith-Workshop 4 months ago  |  last reply 4 months ago


recommended cameras for FTIR?

Hi Everyone, Need some wisdom on a good camera to get for a multi-touch ftir screen. i've destroyed two cameras so far trying to making this thing work (to no avail) :-( #1 was a Logitech quickcam pro 9000 (had to rip apart the AF mechanism to get to the IR filter) #2 was a Logitech quickcam chat, which i successfully converted (ie pulling the IR filter and putting in a visible light filter - film), but the thing would work in low light levels to save its own soul, and turns out CMOS sensors are no good for this kind of application from what I'm reading. So if anyone out there has a camera that they've had particularly good luck with that they'd like to share the name of with me, I'd be ever so grateful. Eviscerating cameras has started to become an expensive proposition for me, so the fewer the better! Thanks!

Topic by cba20k 10 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?

Question by tylervitale 6 years ago  |  last reply 6 years ago