uCalc DIY scientific calculator
EEVblog made an open source calculator with a PIC: PIC 24F 16 bit Processor, 256KB Flash, 16KB SRAM, 64KB serial flash user memory, 3-Axis tilt sensor, Micro SD card, capacitive touch sensing keypad,...
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Networked graphing calculators
These TI calculators are networked together, able to pass information and play games on a multi-screen playing field. Via Hack a Day.
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Resistor divider calculator
Ultrasounder shared a resistor divider calculator spreadsheet: Don’t we all have had frustrations galore when we were trying to fine tune the resistor divider for our voltage feedback on PS and LODs?...
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Electronics calculator
Chuckt found even more common electronics calculator spreadsheets. Via the comments.
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7400 competition entry: Four digit RPN calculator
John entered his four digit RPN calculator into the Open 7400 Logic Competition. This is the fist of two entries he made while attending “Digital Hardware Lab” courses at the University of Utah. It is...
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Excel-based transistor amplifier calculator
Paulo shared an Excel-based transistor amplifier calculator. ‘Besides the basic gain and biasing calculations many others implement, this calculator can also estimate noise which is a bit more...
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GPS for graphing calculators
Kerm Martian from Cemetech has documented a GPS for graphing calculators project build: Graphing calculators are nothing less than powerful pocket computers, capable of doing many of the same things...
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Go analog with a resistance-based calculator
tanishqjain340 wrote this instructable detailing the build of his analog calculator project: Do simple calculations with your math box. The next time you need to crunch a couple of numbers, resist the...
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RC snubber calculator spreadsheet
Paulo has developed a free RC snubber calculator, an Excel-based calculator eases the design of RC snubbers in power switching applications: In power switching applications, a designer often has to...
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Reverse engineering a simple four function calculator: die decap
Electronupdate did a teardown and analysis of a cheap four function calculator: It’s such an amazingly old looking die Even with 400x magnification it would not be too hard to reverse engineer back to...
View ArticleTear down of a scientific calculator Integrated Circuit
A detailed video teardown of a scientific calculator Integrated Circuit from Electronupdate. More info at Electronupdate blog.
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TI’s Little Professor
A teardown of TI’s Little Professor vintage calculator from KuzyaTech: This thing was sold for parts and repair since the seller did not think it was working. As it turned out, everything worked just...
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Reverse engineering RAM storage in early Texas Instruments calculator chips
Reverse engineering RAM storage in early Texas Instruments calculator chips: Texas Instruments introduced the first commercial single-chip computer in 1974, combining the CPU, RAM, ROM, and I/O into...
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