Experiments 1.2: Introductory Power Supply Circuit II (Mains PSUs)

[dquad]

Are EIA 3216 Capacitors directional?

[DerekMolloyDCU]

@EpicTronics Thanks for posting the update. I was thinking it could be that or that your PTC was under-rated - but in that case you should not have been getting an output.

[EpicTronics]

Actually, ignore my last post, I think I connected the PTC directly from the + pin on the switch and not the - pin !

[EpicTronics]

When I used my PTC, it became extremely hot. I am supplying 9v (from the plug socket). Would it be sufficient just to have the same circuit diagram as you have but without the PTC?

[garfrankwyn]

These are the best circuit building vids on the web, possibly the earth. I hope they pay teachers well in Dublin.

[DerekMolloyDCU]

@CIPHERJAY It depends on the Voltage that you are running at and the current that it is drawing. At 12V with 300mA it would be P=VI = 3.6W, so I would go for the higher one. I can't remember which one I used, but it was probably one of their cheapest!

[CIPHERJAY]

@DerekMolloyDCU Thanks for the reply, the end part made me laugh!

[CIPHERJAY]

Hello again, im not sure what power rating i should have. From farnell there is a 2.7W or a 6.8W. What one would be best to power my circuits? Im using the same regulator that you have.

[CIPHERJAY]

Hello, would it be possible to give the full description of the barrel jack socket? I put a search into farnell however i cannot find the one you are using. Thankyou!!

[dzxxbj]

@CIPHERJAY I think this part can be cannibalized from the old ones like radios etcs.You can find these easily .

[ExtremHybrid]

Question: What PTC are you using? Manufacturer No. and details pls.

[DerekMolloyDCU]

@ExtremHybrid Good point. It is a Multicomp MC33175 (supplied by Farnell) 0.5A 90V DC Tripping Current of 1A. The other one I use is the MC33170 0.17A 60V DC Tripping Current of 0.34A. They have a full range and you can choose one depending on your PSU/Circuit requirements.

[ExtremHybrid]

PS.: In the end of the video you said "this module"....it would be great if you could sort ALL your videos into playlists and some how decide on a definitive, self-explanetory naming convention. (just my input). Keep it up!

[DerekMolloyDCU]

@ExtremHybrid Good idea - thanks for the input! I have updated all of the video titles to provide an ordering and I have added a playlist that identifies the main videos.

[ExtremHybrid]

I stumbled upon you latest video and I have to say that your production quality is superb. You are right up there with Afrotechmod and EEvblog!

I wished you would make more videos and toture us with your great accent.

Greetings from Germany,

- ExtremHybrid