Need halp to build an FM receiver with speaker

I've been struggling a bit to build a DIY radio.

I remember doing it in school. That time, I saw it in some electronics pamphlet, which involved a copper coil with many rotations around a tube and a carbon rod inside it. Now as an adult, I am unable to do it again! It is a struggle to find all the components. Would like to know if anyone has used a circuit and built an FM receiver.

Found a circuit with unclear instructions, and components missing from the requirements list, as well as wrong labels in the circuit, which were together all a pain. I am at the end of my wits when it comes to troubleshooting the build, so I'm just chucking it and going for something else.

Now I am planning to build either this one or this one.

Need some pointers, or any help. Not sure why they were not working as well. Double checked the connections and values of the components to make sure no nF was a pF or something.

W

I don't have any experience regarding this but I found these,may be of some help(below is 1st of 4 part series):

You may also look for DIY hobby kits designed with such ICs that are available in those electronic component shops in your city.

Thanks, will look at the video. I'm looking for something cheap, to learn and to be able to write about it. Yeah, saw those kits, but do not wanna use that shortcut just yet. They also seem ridiculously expensive. Trying out various circuits from the net, I could get together one kit for as little as Rs 70.

How are you building it? On a blank prototype board? Sometimes wiring on the other side gets too messy and difficult to trace. Do you have a multimeter? Did you check for connectivity between all your components after assembling the same?

Im using a breadboard. I did check if I had put everything in the right place and made sure the wires and the ic, capacitors and resistors were deep inside. I did not check the connectivity, how to do that?

W

Though I am not familiar with this,shouldn't a multimeter be able to help you in situations like these by checking for expected amperes & voltages across sections.

H

Anorion said:
Im using a breadboard. I did check if I had put everything in the right place and made sure the wires and the ic, capacitors and resistors were deep inside. I did not check the connectivity, how to do that?

Vertical lines are shorted together in a normal breadboard.

In multimeter, there is a beep mode. I will try to upload a photo once I reach home.
It beeps if the two leads have little to no resistance between them. This feature is present in al mutimeters.

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Yup, got it. Will check with it next time. Thanks.

H

Anorion said:
Yup, got it. Will check with it next time. Thanks.

The one marked in white is the continuity testing mode
*uploads.tapatalk-cdn.com/20180226/ee33fc40694aaf5426fce73a60678d21.jpg

^thanks, it failed. I removed everything and tested on the breadboard then also some failed. I think the breadboard was too dusty for too long, it was an old one. Will get a new breadboard now.

H

Anorion said:
^thanks, it failed. I removed everything and tested on the breadboard then also some failed. I think the breadboard was too dusty for too long, it was an old one. Will get a new breadboard now.

Breadboards have too much capacitance. It may so happen that it may not work on a breadboard.

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Oh wow. Had no clue. Thanks for the info. Will first try on the breadboard, or else will solder.