Electronics > Projects, Designs, and Technical Stuff

Bob Widlar's hassler circuit

<< < (6/6)

james_s:

--- Quote from: georges80 on January 30, 2015, 01:25:23 am ---Amusing concept... More sophisticated than my high school prank.

Back in the dark ages (I was in high school, probably around grade 10) back in the early 70's....

I built an oscillator circuit and a mate & I installed it into a homemade pencil case. The bottom contained the circuit and the battery/speaker, the top had a false floor (to hide the goodies) and pencils etc sat up there. There was a microswitch that you could activate by sliding one pencil just far enough to push down on it and fire up the oscillator.

I sat at the back of the class (many knew I was an electronics nerd) and my mate at the front. He would activate the oscillator that of course was just high enough to be very irritating and non-directional due to bouncing off everything but low enough for the teacher to 'hear'.

Kids would turn to look at me, but my hands were up off the table and no link to me could be made.

I remember one class where the teacher was slowly becoming more and more irritable and some poor unfortunate student came in quite late, she totally lost it on the student who suffered her pent up wrath.

Aaah, the simpler times :)

cheers,
george.

--- End quote ---


I remember in a tech class in highschool (in the 90s) we had digital multimeters and I would sometimes sit there beeping the continuity beeper until someone would get upset. Beep beeeep beep beep beeeeeeeeeeeeeeep beeep beep... The teacher was in his late 50s and couldn't hear it, he'd give us funny looks before he figured out what was going on.

Navigation

[0] Message Index

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod