I've just finished to solder this little circuit on perfboard and now I realize that the board is bent:
I am pretty sure that the board was flat when I purchased it. What may cause this bending ?
- excessive heat ?
- there are some long solder bridges in that part of the board; is it possible that the solder shrinks when getting solid/cold ?
Edit: Those boards are sold as "bakelite" boards at a local shop. I'd say they are low quality boards (eg. the solder pads tend to come off easily)