Cardboard PCB!

[Things]

Hmm, weird that it doesnt seem to be working. Get about 1V on the output, but no current at all, and adjusting the pots does nothing. Then again, maybe my transistor is dead ...

Why do all the flexmods have to be out of stock

[dave]

Thats generally what i use this stuff for

http://jaycar.com.au/productView.asp...T&SUBCATID=255

[300EVIL]

Thats generally what i use this stuff for

http://jaycar.com.au/productView.asp...T&SUBCATID=255

Or these for a test run...



Although, I use foam board and paper layouts to build mockups of boards before I have them produced. Definitely a good way to make sure everything fits right.

[Things]

I did try on some experiment board and a breadboard, but they all had the same problem, and that is my point to point wiring sucks

I used this method so I could just follow the traces, but it still doesn't work ...

Anyone got a flexmod? ....

[Things]

Anyone see any problems using the TIP41C instead of the BD437?

[QUAZAR]

This reminds me of something a rather clever sound engineer told me many years ago.

Said engineer was unfortunately incarcerated for a couple of months due to being found in posessiion of certain recreational substances. During his time away, he embarked on a creative project to keep himself busy and enroled in a number ot art activity classes.

Creative use of a piece of cardboard and a number of foil wrappers from chocolate bars enabled him to build a rudimentry PCB. An old transistor radio provided some usefull electronic components and within a week he has a working FM transmitter.

This was coupled with his cell mates cassette player and "Prison FM" went live. They broadcasted for a couple of hours each evening and were even taking requests for the pricely sum of 1 cigarette.

Everything was going well for the first couple of weeks and would have probably gone on for longer. Except that one elderly local resident phoned the prison governor and asked for a request.

[hobbybob]

Things you probably already checked:

1. Polarization of the diodes:
2. Pinout for transistors (maybe turned around the transistor), if using a replacement (i mean substitute) see if pinout is the same. Sometimes this is different (base and collector switched around).
3. orientation of ic
4. power to IC ? (some schematics don't have plus and minus drawed al the way to the ic)
Since you used a pcb layout this must be ok.

Looks nice ! SUcces hope you get it to work, electronics is always cool, but when it works it's less cool ;-)

[dnar]

Anyone see any problems using the TIP41C instead of the BD437?

The TIP41C has much lower HFE (DC current gain) so might require more base-emitter current. It should work ok I think.

[dave]

Anyone see any problems using the TIP41C instead of the BD437?

The pinout is backwards?

[Things]

The pinout is backwards?

No it's not?

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