Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 6 replies
  • Subscribers 32 subscribers
  • Views 753 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Fuse Finder.

Zoomup
I have a Martindale Fuse Finder Kit. It comprises a plug in FD 600/T sender unit and a FD-500/R receiver unit. The receiver unit does not appear to work properly. I have stripped it down and tested it. Its L.E.D. oscillates when the receiver unit is placed right next to the transmitter/ sender unit so I think that the receiver is receiving a signal, but it does not make a sound. I have taken out the little 5V sounder but it is dead on temporary batteries out of the unit. I suppose that it is suitable for a D.C. supply. It may need a varying supply at 5V I do not know. Anyway I have ordered a new sounder unit to try to see if I can repair it.


The sounder unit looks like this.

https://www.ebay.co.uk/itm/Miniature-Electronic-Buzzer-Sounder-5v-Subminiature/123750468773?hash=item1cd01a4ca5:g:RmAAAOSwiDFYM1dn


Any suggestions please?


Bye,


Z.
Parents
  • 0
    Thanks Mike,

                            I will fit a new sounder and see what happens. The old one is encapsulated with just two leads and I can not get into it. It also has no markings on it. The circuit board has an NE555P chip on it and a few resistors, diodes, capacitors and a transistor at the detector end. The booklet states that the switching frequency is 5Hz. approx. That seems to be about the rate at which the L.E.D. flickers on and off.


    Bye,  Z.
Reply
  • 0
    Thanks Mike,

                            I will fit a new sounder and see what happens. The old one is encapsulated with just two leads and I can not get into it. It also has no markings on it. The circuit board has an NE555P chip on it and a few resistors, diodes, capacitors and a transistor at the detector end. The booklet states that the switching frequency is 5Hz. approx. That seems to be about the rate at which the L.E.D. flickers on and off.


    Bye,  Z.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines