project:edubrm:start
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project:edubrm [2011/08/30 14:31] – edubrm done \o/ pasky | project:edubrm:start [2016/11/28 02:02] (current) – ruza | ||
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+ | ====== EduBRM ====== | ||
+ | {{template>: | ||
+ | name=EduBRM| | ||
+ | image=edubrm.jpg? | ||
+ | sw=BSD 3c| | ||
+ | hw=CC BY-SA| | ||
+ | founder=[[user: | ||
+ | interested=[[user: | ||
+ | status=done}} | ||
+ | ~~META: | ||
+ | status = done | ||
+ | & | ||
+ | ~~ | ||
+ | |||
+ | ===== Great Global Hackerspace Challenge ===== | ||
+ | |||
+ | {{..: | ||
+ | |||
+ | {{: | ||
+ | |||
+ | * http:// | ||
+ | * http:// | ||
+ | * http:// | ||
+ | * http:// | ||
+ | |||
+ | ===== About ===== | ||
+ | |||
+ | Aim of our project was to create an open platform for teaching | ||
+ | electronic principles. Our target audience were students of | ||
+ | elementary and comprehensive schools interested in this field. | ||
+ | The main idea of the project is to provide modular design. One | ||
+ | " | ||
+ | are used for particular scenarios. During the challenge we created | ||
+ | three example shields and one debug shield for our purposes. | ||
+ | |||
+ | Mother board is based on ARM Cortex M3 chip (more exactly LPC 1343 | ||
+ | from NXP Semiconductor), | ||
+ | Amplifiers. This combination allows us to read 6 analog values | ||
+ | from the shields, which can be very low, because they can be multiplied | ||
+ | up to 32x. DDS generates frequency from 1 Hz up to 50 MHz in 1 Hz steps, | ||
+ | which can be used for generating various signals or alternating current. | ||
+ | |||
+ | The first demo shield we create illustrates the creation of | ||
+ | electricity using a dynamo and electrodes. These are made from | ||
+ | different metals and can be plugged into lemon or a potato. Software | ||
+ | reads up voltage and draws a nice graph. | ||
+ | |||
+ | Second shield represents a simple DC circuit with a battery, switch | ||
+ | and a bulb. Edubrm application can detect whether battery and bulb are | ||
+ | present and if the student has pressed the button. It also visualizes | ||
+ | which parts of the circuit have power and which not. | ||
+ | |||
+ | Third shields can visualize voltages and currents in circuits with | ||
+ | coils and capacitors. It can also switch between AC and DC power source | ||
+ | so student can easily understand behaviour of these electronic parts | ||
+ | while turning the power on and off. | ||
+ | |||
+ | Check the following video to get the idea how it works! | ||
+ | |||
+ | {{youtube> | ||
+ | |||
+ | We also came up with ideas for lots of shields that could be used in | ||
+ | other fields than electronics. Sadly, we were not able to implement | ||
+ | them in time. To give some examples: | ||
+ | |||
+ | * shield with two speakers emitting the same soundwave but with different phase, student can use the microphone to find out that there' | ||
+ | |||
+ | * shield that can read various amplified biosignals, like ECG or EEG (medicine) | ||
+ | |||
+ | * shield with dynamo and motor connected through gears, student can inspect the resulting voltage while changing the gear ratio (mechanics) | ||
+ | |||
+ | ===== Detailed specification ===== | ||
+ | |||
+ | === hardware === | ||
+ | * open-source (e.g. CC BY-SA) | ||
+ | * predefined module pinout, each pin having one specific purpose | ||
+ | * " | ||
+ | - ARM processor (around 70 MHz) | ||
+ | - 1 or 2 generators | ||
+ | - 2 multiplexers | ||
+ | - 4 IC analog switches | ||
+ | * " | ||
+ | - various components depending on purpose (e.g. switches, bulbs, resistors, coils) | ||
+ | * short-circuit protection | ||
+ | * overvoltage protection | ||
+ | * needs to be lowcost as possible but durable | ||
+ | |||
+ | === software === | ||
+ | * open-source (e.g. GPLv3) | ||
+ | * ability to analyze measurements by computing and visualizing measured values of voltage, current, power, frequency, etc. | ||
+ | * has to be able to simulate/ | ||
+ | * possibility of creating interactive quizzes / games | ||
+ | |||
+ | === example shields/ | ||
+ | a) basics - "how is electricity created" | ||
+ | - electric field | ||
+ | - electrochemic reaction | ||
+ | - electromagnetism and measurements | ||
+ | |||
+ | b) simple circuit with battery, wires, switch and lightbulb | ||
+ | -basic electric circuit AC/DC | ||
+ | -theory and measurements | ||
+ | |||
+ | c) slightly advanced circuit with resistors, coils and capacitors | ||
+ | - electronic parts R, C, L in AC/DC circuits | ||
+ | - basic measurements | ||
+ | - RC, LC measurements | ||
+ | |||
+ | d) advanced measurements on semiconductors | ||
+ | - basic measurements on diodes > meaning of PN | ||
+ | - measurements on transistors | ||
+ | - operational amplifiers | ||
+ | |||
+ | e) much much more! | ||
+ | |||
+ | ====== Pionout assignment ====== | ||
+ | |||
+ | SPI: | ||
+ | ------------------ | ||
+ | SDI -27 - input | ||
+ | |||
+ | SDA -28 - output - ?? | ||
+ | |||
+ | SCLK-29 - output - ?? | ||
+ | |||
+ | FSYNC - 10 - output -1 | ||
+ | |||
+ | OA1CS - 43 - output -1 | ||
+ | |||
+ | OA2CS - 48 - output -1 | ||
+ | |||
+ | SWITCHE: | ||
+ | ------------------- | ||
+ | |||
+ | SW1 -12 - output -0 | ||
+ | |||
+ | SW2 -24 - output -0 | ||
+ | |||
+ | SW3 -25 - output -0 | ||
+ | |||
+ | SW4 -31 - output -0 | ||
+ | |||
+ | SW5 -36 - output -0 | ||
+ | |||
+ | SW6 -37 - output -0 | ||
+ | |||
+ | AD: | ||
+ | ------------------- | ||
+ | |||
+ | CPU_AD_IN_1 -33 -input | ||
+ | |||
+ | CPU_AD_IN_2 -34 -input | ||
+ | |||
+ | CPU_AD_IN_3 -35 -input | ||
+ | |||
+ | CPU_AD_IN_4 -39 -input | ||
+ | |||
+ | CPU_AD_IN_5 -40 -input | ||
+ | |||
+ | CPU_AD_IN_6 -30 -input | ||
+ | |||
+ | OA2_OUT | ||
+ | |||
+ | PWM: | ||
+ | -------------------- | ||
+ | |||
+ | PWM_1 -46 | ||
+ | |||
+ | PWM_2 -17 | ||
+ | |||
+ | |||
+ | DIO: | ||
+ | -------------------- | ||
+ | |||
+ | DIO_1 -1 - output -0 | ||
+ | |||
+ | DIO_2 -11 - output -0 | ||
+ | |||
+ | DIO_3 -2 - output -0 | ||
+ | |||
+ | |||
+ | ====== Links for inspiration ====== | ||
+ | * analog switches: | ||
+ | * http:// | ||
+ | * Opamp: | ||
+ | * http:// | ||
+ | * http:// | ||
+ | * http:// | ||
+ | * DDS generator: | ||
+ | * http:// | ||
+ | |||
+ | Interesting project of dataloger: http:// | ||
+ | |||
+ | Nice theory blog with lot of tutorials : http:// | ||
+ | |||
+ | Lady Ada lpc1343 tutorial : http:// | ||
+ | |||
+ | nokia lcd ( SPI test ) : http:// | ||
+ | |||
+ | http:// | ||
+ | |||
+ | http:// | ||
+ | |||
+ | http:// | ||
+ | |||
+ | http:// | ||
+ | |||
+ | 12->48 MHz crystal http:// | ||
+ | |||
+ | http:// | ||
+ | |||
+ | * 14851 - 8696 - 2650 - 365 = 3140 | ||
+ | |||
+ | |||
+ | ====== Schematics ====== | ||
+ | |||
+ | {{: | ||
+ | |||
+ | |||
+ | ====== GitHub, last commits ====== | ||
+ | |||
+ | {{rss> |
project/edubrm/start.txt · Last modified: 2016/11/28 02:02 by ruza