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Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
Totally true story here, so hang with me. Picture, if you will:
You go to visit your grandmother and she's making turkey. In fact, this is the biggest turkey man has ever known; it must be 200 pounds( stay with me here, totally true story, remember). As shes carrying it from the kitchen to the table (with one hand), she slips on a banana peel and falls, breaking her hip.
She cries "Ohhh my hip!"
You know immediately that the only solution is to find a LM158, and fast!
You run to her drawers and start searching through grandmother's stash of opamps. TL082, LM741, LM324... damn!! No 8 pin DIP packages for single ended supplies (and which aren't JFET like the TL082)!!!
What are you to do! Suddenly inspiration strikes, and you grab the LM324... if only it was 8 pin instead of 14!! You find grandma's pliers, and quickly crush one side of the LM324, leaving half of it intact. You rush back to grandma, hoping, praying, that your ghetto chip will work...............
Grandmother is SAVED!!!
The moral of all that ^ is that LM324s work great if you demolish half of the chip to make an 8pin package. You do have to move one of the supply pins to make it pin compatible with the 158 or TL082, but it does work!
Registered Member #63
Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
LOL
Bloody brilliant!
Makes me reminisce about the days of the 486DX/2 and various permutations of the 486 processor where manufacturers apparently put in extra stuff to inhibit things like the coprocessor, or to make the chip run at half speed... somewhere on the net is the (apparent) story about a group of germans who found where to drill a precise hole in the corner of the chip to enable it to go at full speed. (see, the manufacturers would bastardize the chip then sell it to you for half-price as a way of being able to offer an 'in the middle option' for less)
Registered Member #72
Joined: Thu Feb 09 2006, 08:29AM
Location: UK St. Albans
Posts: 1659
OK Andrew, I've read it, and again, and understand the bit about butchering the op-amp. I must admit I'm not keen on the thought of you rummaging through your Grandma's drawers as she's lying on the ground clutching her hip (HIP4082, Harris Intersil FET bridge driver?). So what the Ffairchild are you talking about, where does your elderly female relative's poultry cuisinations come into the story ??? I suppose if BP and Alex get it, then it must be me, not you. Sorry if you explain it and spoil the joke for everyone else.
Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
Niel, don't feel bad, Jim didn't get it either. I was just trying to provide a cute and intentionally ridiculous justification for the modification. I need urgency (the grandmother breaking her hip) and a cause (the mega turkey).
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LM324 Funny
