Let your mind enter a state of deep unconsciousness, imagine that instrument you have always desired, an instrument capable of performing multiple tasks, data acquisition, signal generation, and much, much more. Imagine no more because this instrument is finally here. The COMA.
COMA+ The All in One Instrument
I am participating in the STM32 Design Challenge, I thought it was a good incentive to continue development of this project. I will improve the original specifications, like using a TFT display and using a few external ICs to simplify the design, like the ICL7135 multimeter IC, and a DDS to generate the waveforms, probably the AD9833.
|Design files provided for reference only|
The COMA was my entry to Microchip's PIC32 contest. It was also an idea I had back in my academic years. I always wished of integrating an oscilloscope, a multimeter and a calculator in a single portable device. With the PIC32 contest I saw an opportunity for developing my project while getting a chance to win free prizes!
The initial features and specifications:
- 2 Channel, 8bit 16MSPS Oscilloscope
- FFT on acquired data
- 8 Channel Logic Analyzer
- Arbitrary Signal Generator
- Frequency Generator
- Volt Meter, 1 M ohm Input impedance
|Voltage Ranges||Ammeter||More Features|
|+/- 204.8V, 400mV sensitivity||+/- 10.24A, 20mA sensitivity 0.2 ohm series||Ohmmeter / continuity test|
|+/- 20.48V, 40mV sensitivity||+/- 204.8mA , 400uA sensitivity 10 ohm series||L/C Meter|
|+/- 2.56V, 5mV sensitivity||+/- 2.048mA, 4uA sensitivity 10 ohm series||Logic probe|
|+/- 256mV, 500uV sensitivity||+/- 20.48mA, 40uA sensitivity 100 ohm series||Frequency meter|
|+/- 204.8uA, 0.4uA sensitivity 100 ohm series||Transistor check|
- Calculator, able to do math on real-time data
- Graphic LCD 128x128
- SD Card for data storage
- Optional connection to PC via USB or RS-232
- 2 Analog Channels
- Input Impedance: 1M ohm
- Maximum Input Voltage: +/- 25V
- A/D Converter Resolution: 8 bits
- Maximum Sampling Rate: 16MS/s shared
Here are some images and videos of the COMA prototype:
- Mini Spice Simulator
- Engineering Notes
- Mini Labview kind application
- MOD/MP3 Player
The COMA will be the ultimate engineering tool!