Alarm simple Closed Loop-Alarm on Break
Project ID:
700226Project Type:
FixedBudget:
$250-$750 USD
Project Description:
I placed this project before and did not follow advice and sent payment for this project outside Freelancer directly to the winning bidder.He has since refunded me 100.00 but The job was not done so I will place this project again.I do have a diagram of a simple circuit using a transistor.(BC558) The diagram does not provide any diodes to protect the transistor so you may have a better way.
Needs of the alarm:FIRST OF ALL I DO NOT WANT JUST A DIAGRAM, I WANT A PHYSICAL ALARM.
(1) Description of operation:
The alarm needs to be a normally closed circuit, which would alarm if the wire were cut. A wire loop made of insulated wire, would be intertwined with the vents in the covers.
Should this be cut, the alarm would sound until the battery went dead. I don’t believe the wire gage it would use is important because of it being battery powered.
(2) Component needs:
(a) It is important for the alarm to use a readily available and cheap IC like a 555 IC or a transistor like a BC558.
(b) It must have a loud alarm, 132 decibel like found in personal alarms.
(c) The alarm would need to be battery powered by a physically small battery, maybe a 9 volt battery.
(d) The box containing the alarm must be as small as possible and the case needs to be easily obtainable and cheap. All must fit in a plastic containment of 5 inches by 5 inches or LESS.
The alarm would be mounted in an area where there are already electronics components which are protected from the weather, so the container of the circuit is not subjected to the elements, but is subjected to vibration and heat up to 110-120 F.
(e) The place where the wire loop attaches needs to have two terminals with metal screws or “screw-downs for “loop wire” (could be like the ones used for stereo speakers) (when wire is cut alarm will sound) I will be using possibly a gauge of wire like insulated telephone wire (#24 gauge) or slightly larger
(f) This must have a “test” button button (push=on; release=off) and a way to cancel alarm by the owner. (micro-switch push=on , push=off) or tiny toggle switch
(g) short alarm for low battery
(h) very low battery drain while circuit is in alarm-off mode
(i) The components must be cheap and easily obtainable costing no more than $5.00 total
Our budget for this project is 300.00.I will need three duplicate alarms sent to me by priority mail.
Also, I must have complete instructions concerning construction so I may build it myself.
If you would like to know me by reputation look at my Ebay ID My Ebay ID is blupkwy.I was one of the original sellers on Ebay and was a Power Seller for many years.I thank you in advance for your help.
Using a 555 ic is not written in stone, you could suggest a better,cheaper method.I do want the loud alarm(at least 130 decibel) and all components in the same container.
Do not worry about getting paid, I honor my commitments,you will get paid promptly.
Skills required:
Electrical Engineering, Electronics, Engineering, Microcontroller, Test AutomationAdditional Files:
SCHEMATIC1+_+PAGE1-1.pdfPublic Clarification Board
6 messages
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blupkwy2
The trip wire can be a couple of inches just for testing.I am going to supply my own wire in usage of the alarms-it will be much longer and of a very low resistance so it will not affect other components, but you do not have to supply a long wire.Also do not send battery I can get it in the US
over 1 year ago
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blupkwy2
Once the wire was cut and alarm sounded it would sound until the battery went dead.
Shipping I know is not included I will pay extra for shipping(actual shipping-not with extra "handling")
We are talking about items weighing much less that a pound,do not mail batteries I can get them in the US but is must be a common 9 volt battery.Loud personal alarms are actually powered with even smaller batteries (1.5 volt X 2)over 1 year ago
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diditgi
You cannot have an alarm sounding as powerful as "personal" or
as a car alarm while being powered off a 9V battery, you know.over 1 year ago
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monishsonpal
Please tell the specifications of the length of wire required. The bid excludes the shipping charges and other expenses.
over 1 year ago
Awarded Bids
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zszabo
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zszabo
From Hungary
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$250
in 10 days
$125 Milestone Requested
$125 Milestone Requested
over 1 year ago
Hi Again,
Please see PM.
B.R.
Zoltan
bchandra1955
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bchandra1955
From India
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$275
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$165 Milestone Requested
over 1 year ago
I am automation engineer wth 32 years of experience supported by two elecronics engineers. Caould give you the tested product. Brajesh
adipdutt
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adipdutt
From India
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Digital Electronics Level 1 (75%, 86th percentile)
Foundation LimeExchange Member
Foundation EUFreelance.com Member
$300
in 12 days
$30 Milestone Requested
$30 Milestone Requested
over 1 year ago
Please see PM
Let's talk about your project on PM. Regards.
amitj9
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amitj9
From India
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$275
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$275 Milestone Requested
over 1 year ago
Hi,
I can design this alarm with a cheap microcontroller in 14 days.
Shipping cost will be extra for the prototypes.
I have 19 years of design experience in Analog and digital electronics and microcontroller b... more
Hi,
I can design this alarm with a cheap microcontroller in 14 days.
Shipping cost will be extra for the prototypes.
I have 19 years of design experience in Analog and digital electronics and microcontroller based systems.
Thanks,
Amit less
i can build your alarm.
Please see PMB..
EmbeddedWorld
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EmbeddedWorld
From Switzerland
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$500
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$250 Milestone Requested
$250 Milestone Requested
over 1 year ago
Hi,
I have excellent experience with electronics hardware and software design. I am very much sure that I can do it. The bid does not include shipping cost.
As a cheaper option I can provide I can provide complet... more
Hi,
I have excellent experience with electronics hardware and software design. I am very much sure that I can do it. The bid does not include shipping cost.
As a cheaper option I can provide I can provide complete solution with PCB layout and simulation but no hardware for $ 200 in 15days.
regards less
my skype:usmankamb.
let's have a start.
See details in MB.
electronics4ever
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electronics4ever
From Ukraine
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$300
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$150 Milestone Requested
$150 Milestone Requested
over 1 year ago
Like I already told you, I can do it. Please, see PM.
i am 24 hour far from u. i.e. i m from Nepal. i can just make a simulator diagram in Proteus, Livewire or in workbench.i can also send u details about the components, and the schematics.
in your project the alarm f... more
i am 24 hour far from u. i.e. i m from Nepal. i can just make a simulator diagram in Proteus, Livewire or in workbench.i can also send u details about the components, and the schematics.
in your project the alarm feature that wouldn't stop until battery goes down may harm the battery life. so there must be a limiting circuits..further discussions after deal less
rlopes15
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rlopes15
From Portugal
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Foundation EUFreelance.com Member
$250
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$250 Milestone Requested
$250 Milestone Requested
over 1 year ago
I can do this project within 15days Shipping fees wil be added
Marwan4job
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Marwan4job
From Kuwait
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$700
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$7 Milestone Requested
over 1 year ago
I am an Electronics Engineer esp. in Instrumentation, Telecomm., and microprocessor system design. Awaiting your positive answer
I can make this project exactly to your requirements. Lets do it! Please see PMB
euripedesrocha
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euripedesrocha
From Brazil
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over 1 year ago
Please see your PMB.
smhbkasemi
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smhbkasemi
From Bangladesh
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$250
in 5 days
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$250 Milestone Requested
over 1 year ago
Hello. I am an Electronic Engineer. Please let me get the job. I will do it effectively.
EmbeddedDesign
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EmbeddedDesign
From United Arab Emirates
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$280
in 14 days
$112 Milestone Requested
$112 Milestone Requested
over 1 year ago
My bid is simply covering all what you mentioned, without any additional costs.
Check your PMB.
zindooo
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zindooo
From United States
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$300
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$75 Milestone Requested
over 1 year ago
Hi, I can provide, all you need.
Iam electronic circuit designer,I had finished car alarm product that used mobile phone to contact with ownner,your project is simple ,i will happy if i can help you,i has addition alarm idea for you,thanks,blupkwy