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16  Using Arduino / Microcontrollers / Re: Atmega328 - 28PU bootloader issues with USBasp | DIY arduino on: August 15, 2014, 06:57:16 am
Glad you got it working okay.
17  Community / Bar Sport / Re: What Faggot means in the UK on: August 15, 2014, 06:52:49 am
This stuff?
18  Using Arduino / Microcontrollers / Re: Atmega328 - 28PU bootloader issues with USBasp | DIY arduino on: August 15, 2014, 05:42:51 am
Ar the moment i dont have a pull down resistor, just a push button switch between the reset pin and ground.  Should i put a resistor in?  I will try all the things suggested after class.  Thanks for all the help!
Pullup not pulldown. You need to connect it between reset and VCC not reset and GND.
19  Using Arduino / Microcontrollers / Re: Atmega328 - 28PU bootloader issues with USBasp | DIY arduino on: August 14, 2014, 11:59:35 am
Do you have a 10K resistor pulling reset (pin 1) to V+ and how are you connecting the USBasp to the 328. All the programming pins you use look to be in the right place on the board but to what pins are they connected on the USBasp.
20  Topics / Device Hacking / Re: RF Communication, send data with an arduino, receive without. on: August 14, 2014, 03:24:53 am
Maybe a more simplistic though slightly bulkier (and less fun) option might be to just simulate the potentiometer control using the lillypad and keep the current transmitter/receiver. No need then to try decoding the RF signal, just work out the centre point and range of the throttle pot and emulate it.
21  Using Arduino / Networking, Protocols, and Devices / Re: Large wireless network on: August 12, 2014, 05:21:10 am
What are you using the network for if all the Arduino's independently log the sensor data to an SD card?

If you want to give each arduino a static IP address then either hardcode it into the sketch before upload or store it in eeprom memory so it survives power down if it's set dynamically using buttons during sketch execution.

Quote
There is no need for sending information from server, except maybe for confirming messages.
30 to 200 network enabled Arduinos are likely to swamp your network/server. Might be better for the server to periodically request data from each arduino in turn.
22  Using Arduino / Programming Questions / Re: How can i make a Matrix small or any idears? on: August 12, 2014, 03:19:55 am
He's gpot PROGMEM called out, so presumabluy it is storing in flash.
Yes but without the rest of the code we don't know if #include <avr/pgmspace.h> is also included.
23  Using Arduino / Programming Questions / Re: How can i make a Matrix small or any idears? on: August 11, 2014, 10:20:07 am
Instead of using boolean data type that needs 1 byte per entry, pack the data into bytes. Instead of needing 512 bytes per array you will only need 64 bytes (an 8x reduction).
You have not posted the entire code or placed it in a code block so don't know if your even storing data in flash memory.
24  Using Arduino / Project Guidance / Re: Both pins on: August 11, 2014, 06:20:20 am
Can I change pin 10 (backlit) to pin 1 (tx) or pin 0 (rx)
I won't use Serial comunication
You can use pin 0 & 1 for other things if your not using Serial or uploading sketches using the bootloader when the shield is connected.
25  Using Arduino / Project Guidance / Re: Both pins on: August 10, 2014, 03:32:30 am
Will it be okay if I will use motor shield, which uses pins 13, 12, 10 for motor a, and 11, 8, 9 for motor b.
And my lcd uses pins 2, 3, 4, 5, 6, 7 (10). 10 pin for backlit. But when I will program these shields, I won't declare lcd shield pin 10, pin 10 will be motor a brake.
If you don't declare pin 10 in the LCD configuration then the LCD library won't use pin 10 but if it's still connected to the LCD backlight and the motor shield then it may effect the backlight and/or motor break when used for breaking. You could try it and see but this could damage something so be careful. I assume pin 10 is used for backlight as it's a PWM pin so the backlight can be dimmed or turned off. You could just move it to another pin or save the pin and make it so the backlight is always on.
26  Using Arduino / Project Guidance / Re: Both pins on: August 10, 2014, 01:09:37 am
Glad you got it working okay.
27  Using Arduino / Project Guidance / Re: 32bit counter - How to handle interrupts during ISR on: August 09, 2014, 06:17:29 am
Well worth looking here at an excellent demo of what your trying to do.
28  Using Arduino / Project Guidance / Re: Both pins on: August 09, 2014, 05:57:53 am
Do you have links to the LCD and Motor shields? Probably the only way to get them working together is to alter both the hardware & software/libraries of one or both shields. Altering the hardware could be simply plugging one shield into something like a breadboard and using patch wires to re-configure the pins used on the arduino.
29  General Category / General Discussion / Re: Liquid leakage from parts on: August 09, 2014, 03:43:30 am
Where they stored in a cool place and humidity in the air condensed onto the parts when they were bought out into a warm room or are they still damp looking/to the touch?
30  Using Arduino / Sensors / Re: Developing a water level sensor with TDR. on: August 08, 2014, 11:36:12 am
I read the thread several times, i was very very excited about your results, however i really can not get how the comparators provide you with this measurement,
Look at this image
and you see the first step is the pulse starting to travelling down the cable and the second step is the reflection coming back from the other end of the cable. If you adjust the comparators so one is triggered by the first rising edge of the signal being sent and the other to trigger on the rising edge of the reflection you can time the difference between the pulse being sent and the reflection coming back. If you know the cable velocity you can then work out how long the cable is.
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