tag:blogger.com,1999:blog-4631002540001230142.post1692721637401818836..comments2023-11-06T03:48:59.937-08:00Comments on FREE CIRCUIT DIAGRAMS 4U: Simple door Alarm circuitZamhttp://www.blogger.com/profile/10858730661733867900noreply@blogger.comBlogger23125tag:blogger.com,1999:blog-4631002540001230142.post-19399112109961752182015-10-23T01:01:54.554-07:002015-10-23T01:01:54.554-07:00can we replace reed switch with limit switch?can we replace reed switch with limit switch?Anonymoushttps://www.blogger.com/profile/00075790092973435982noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-13578761997484866282013-11-09T04:16:21.750-08:002013-11-09T04:16:21.750-08:00Hi, Can anyone say me, why the circuit includes a ...Hi, Can anyone say me, why the circuit includes a resistor R2 and capacitor C2? What do they make, please? Anonymoushttps://www.blogger.com/profile/14456031478283794846noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-38751324263476772282013-04-18T01:30:24.498-07:002013-04-18T01:30:24.498-07:00can anyone explain how the circuit work
i m a begi...can anyone explain how the circuit work<br />i m a beginer<br />thxAnonymoushttps://www.blogger.com/profile/04568007690789455563noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-14928760520768103122013-01-16T20:02:00.390-08:002013-01-16T20:02:00.390-08:00Srry not from we its from where we get the read sw...Srry not from we its from where we get the read switch..ok..Raazihttps://www.blogger.com/profile/05812353075621191400noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-8833214283073724832013-01-16T19:59:31.500-08:002013-01-16T19:59:31.500-08:00From we get the read switch and what is the specif...From we get the read switch and what is the specification of it.?Raazihttps://www.blogger.com/profile/05812353075621191400noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-56899203956913745532012-12-30T01:05:08.973-08:002012-12-30T01:05:08.973-08:00Nice Circuit.......Nice Circuit.......Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-64950903411826758462012-03-28T07:56:24.124-07:002012-03-28T07:56:24.124-07:00simply I'll give you a method.But this is not ...simply I'll give you a method.But this is not a long timer this will work for one or two min.use a capacitor(250uf) to the speaker.Zamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-51973177195270625462012-03-27T09:30:14.356-07:002012-03-27T09:30:14.356-07:00Hi i was just wondering if you could put a timer i...Hi i was just wondering if you could put a timer in this circuit so that the alarm would not go of straight away but instead after say 5 mins? if so where would you put the timer?John bhttps://www.blogger.com/profile/06125430985241738806noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-73747650311670883242011-12-17T19:53:06.294-08:002011-12-17T19:53:06.294-08:00can i know the specification of speaker used ?can i know the specification of speaker used ?amalpjhttps://www.blogger.com/profile/04492544130819582936noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-64738848049490475732011-10-30T07:33:54.163-07:002011-10-30T07:33:54.163-07:00Hi,
You can use the similar transistor for Q2...Hi,<br /><br /> You can use the similar transistor for Q2 which has high out put( high W ).Right now I can remember a number for that but by using transistor data book you can do it easilyZamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-31548155432673855382011-10-28T00:56:12.037-07:002011-10-28T00:56:12.037-07:00how can i increase the volumehow can i increase the volumelovethief.143https://www.blogger.com/profile/13696355859371333689noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-77874908272295823982011-10-13T10:58:29.552-07:002011-10-13T10:58:29.552-07:00in R1=330K & R2=100R what K & R refers to....in R1=330K & R2=100R what K & R refers to.... and c1 =10nF-63V,isn't it 10micro farad and not nano.. and how the capacitors are useful here... please explain.....thank u...sreenathhttps://www.blogger.com/profile/12179495625324499279noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-6053395647085340992011-10-13T05:39:08.603-07:002011-10-13T05:39:08.603-07:00This comment has been removed by the author.sreenathhttps://www.blogger.com/profile/12179495625324499279noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-85828256244020798692011-10-12T07:47:20.190-07:002011-10-12T07:47:20.190-07:00Read switches are some switches which can activate...Read switches are some switches which can activate(on/off)by using magnetic power.Here firstly we give the signal to Q1 But out put power is not enough so we have used the second Q2 to generate the power.then it gives enough power to the speaker.If you have more questions don't hesitate to contact meZamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-1793735925038469422011-10-11T07:38:32.618-07:002011-10-11T07:38:32.618-07:00please explain me the working of the entire circui...please explain me the working of the entire circuit.......sreenathhttps://www.blogger.com/profile/12179495625324499279noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-84949130696936553372011-09-06T05:10:39.851-07:002011-09-06T05:10:39.851-07:00where can i get a PCB layout for this circuit diag...where can i get a PCB layout for this circuit diagram???diana03https://www.blogger.com/profile/09157964819947035334noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-73978319283618743652010-11-11T07:56:34.758-08:002010-11-11T07:56:34.758-08:00No you cant use thatNo you cant use thatZamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-47931020432169998952010-11-11T02:20:26.772-08:002010-11-11T02:20:26.772-08:00can i replace the bc327 with a bc558? please reply...can i replace the bc327 with a bc558? please reply soon.Unknownhttps://www.blogger.com/profile/00697622868721147940noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-54355205625516868052010-04-21T09:24:08.463-07:002010-04-21T09:24:08.463-07:00yes you are correct.We can use 1.5V to make a soun...yes you are correct.We can use 1.5V to make a sound.Here I have used Q1 and Q2 to amplify the signal which comes from read switch.Zamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-7924791709811523322010-04-20T11:21:53.415-07:002010-04-20T11:21:53.415-07:00Hi, I would like to know the specific functions of...Hi, I would like to know the specific functions of each component in this circuit(R1,R2,C1,C2) and why wouldn't a 3V battery source make the speaker sound but a 1.5V Battery source would. <br />Thanks a million!Unknownhttps://www.blogger.com/profile/02927587308722613118noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-28054761508476339982010-04-20T11:15:32.648-07:002010-04-20T11:15:32.648-07:00Hi, I would like to know the specific functions of...Hi, I would like to know the specific functions of each component in this circuit(R1,R2,C1,C2) and why wouldn't a 3V battery source make the speaker sound but a 1.5V Battery source would. <br />Thanks a million!Unknownhttps://www.blogger.com/profile/02927587308722613118noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-88315729261102499062010-02-09T10:10:06.279-08:002010-02-09T10:10:06.279-08:00you can fix a rheostat between C1 and the speaker....you can fix a rheostat between C1 and the speaker.Zamhttps://www.blogger.com/profile/10858730661733867900noreply@blogger.comtag:blogger.com,1999:blog-4631002540001230142.post-59317662298423272762010-02-09T06:43:17.485-08:002010-02-09T06:43:17.485-08:00where can I place a rheostat in order to lengthen ...where can I place a rheostat in order to lengthen the noise emitted by the speaker? (by R1 or R2 or C1 or C2)Unknownhttps://www.blogger.com/profile/01697232891403872538noreply@blogger.com