Search found 420 matches

by myp71
Fri May 02, 2003 9:49 am
Forum: General Discussion
Topic: please help?
Replies: 8
Views: 1532

Re: please help?

thanks everyone I will check it all out.<p>Ryan
by myp71
Thu May 01, 2003 8:55 pm
Forum: General Discussion
Topic: please help?
Replies: 8
Views: 1532

Re: please help?

Thanks everyone for you help It is really nice of you guys to help like this.But I need some more help I built the circuit and the darn thing does not work the circuit seems to work because it buzzs the transformer every ten seconds but these trans are not suppose to buzz this loud it sounds like a ...
by myp71
Thu May 01, 2003 5:12 pm
Forum: General Discussion
Topic: please help?
Replies: 8
Views: 1532

Re: please help?

Thank you so much Dean one more quiestion on the transformer when I put the two yellows wires on a power supply it made a big spark like it was going plus to minus so will it hurt the circuit when i connect it up.<p>thanks again
Ryan
by myp71
Thu May 01, 2003 4:19 pm
Forum: General Discussion
Topic: please help?
Replies: 8
Views: 1532

please help?

Hi I was wanting to know if you guys would look at this circuit to see if you could tell me how to hook up this transformer how they want it hooked up, it is the same trans that they call for. primary side has black two wires and secondary has three wires two yellows and one black. while you are loo...
by myp71
Wed Apr 30, 2003 10:26 am
Forum: General Discussion
Topic: How to wire telephone as an intercom circuit
Replies: 6
Views: 1260

Re: How to wire telephone as an intercom circuit

Try this one then if thats what you are looking for then let me know how it goes because I was going to build it.<p>
http://electronic-circuits-diagrams.com ... ckt2.shtml
by myp71
Tue Apr 29, 2003 10:27 am
Forum: General Discussion
Topic: A battery switch and a switching power supply
Replies: 3
Views: 948

Re: A battery switch and a switching power supply

that's what what I thought because the switching power supply shares the 12 volt and 5 volt ground so I just wanted to be sure.<p>
thanks you all for your help<p>If any one still has a circuit digram that will switch over when the batts go dead let me know.
by myp71
Tue Apr 29, 2003 10:18 am
Forum: General Discussion
Topic: A.C/D.C power
Replies: 6
Views: 1169

Re: A.C/D.C power

thanks Greg, you are a great help<p> :D :cool:
by myp71
Mon Apr 28, 2003 7:56 pm
Forum: General Discussion
Topic: A.C/D.C power
Replies: 6
Views: 1169

Re: A.C/D.C power

thanks for the info again Greg so if I get a plug-in transformer that puts the voltage down to 12 volts A.C I could get rid of some of these steps right?
by myp71
Mon Apr 28, 2003 7:52 pm
Forum: General Discussion
Topic: A battery switch and a switching power supply
Replies: 3
Views: 948

A battery switch and a switching power supply

I have two questions #01 is there a circuit that when two aa batteries go dead will switch over to another set of 3volt batteries i'm going to use this cricuit on a solar charger for the batteries so if the solar panels do not get enough power during the day to charge the batts the circuit will swit...
by myp71
Mon Apr 28, 2003 7:25 pm
Forum: General Discussion
Topic: A.C/D.C power
Replies: 6
Views: 1169

A.C/D.C power

Does anyone know how to turn A.C power into D.C power?<p>
thanks
Ryan :cool:
by myp71
Fri Apr 25, 2003 11:23 am
Forum: General Discussion
Topic: circuit design
Replies: 4
Views: 1007

Re: circuit design

hi once again i was wanting to know if these circuits will work for me and which one will be better
this is circuit # 01<p>http://electronic-circuits-diagrams.com ... ges/10.gif<p>this is # 02<p>http://electronic-circuits-diagrams.com ... ages/2.gif
by myp71
Thu Apr 24, 2003 9:49 pm
Forum: General Discussion
Topic: need advice for multimeter with pc interface
Replies: 6
Views: 1577

Re: need advice for multimeter with pc interface

I have a digital multimeter R.S cat. no 22-805 I think that it works great along with the meter for
a battery monitor to monitor solar battery charging.
by myp71
Thu Apr 24, 2003 9:40 pm
Forum: General Discussion
Topic: DTMF Home Automation
Replies: 9
Views: 1791

Re: DTMF Home Automation

I built a project that was a old phone I put the mic in a remote location to listen to people.Anyway the voltage I used for the phone to work was 4AA batt
(6 volts) to get a phone to ring I heard from my phone company that it is aroung 70 volts A.C
:cool:
by myp71
Thu Apr 24, 2003 9:31 pm
Forum: General Discussion
Topic: circuit design
Replies: 4
Views: 1007

Re: circuit design

Thanks for your help Greg I'm looking at one of those emergency backup lights now but all i see is a transistor and some diodes the transistor leads go to the light then another one goes to the battery ground then the last one goes to all of the diodes and resistors thats were I get lost.I kind of t...
by myp71
Thu Apr 24, 2003 5:04 pm
Forum: General Discussion
Topic: circuit design
Replies: 4
Views: 1007

circuit design

Wow looks like I found heaven anyway I wonder if anyone knows how to build a battery backup system so when the A.C power goes out it will switch over to battery the battery would have to be different voltage like from 3-12 volts D.C<p> :D