Forum >LED Plug for Megga and Standard Arduino Sensor Shields
LED Plug for Megga and Standard Arduino Sensor Shields
anonymous 2011-01-22 23:29:38 10126 Views6 Replies I want DFRobot to make a small digital LED Plug for the sensor shield that will turn Red if the output is high and Green if the output is low. Use one of those 3 socket connectors. Put an 0805 resistor to D then a green 0805 LED to GND and a Red small 0805 LED to VCC. It would be small and look sort of like this but would be much smaller with 0805 parts and have two LEDs instead of one. I don't think this even has a resistor, and this has pins instead of sockets. I don't even know what good this is but it's the only thing I have found that looks like what I want:
[img]
RobotShop.com sells them here: http://www.robotshop.com/vex-led-indicator-pack-1.html
DFRobot could make a much better version of this with two colors and a resistor so you could plug it in the Sensor Shields. They would be great little indicators for troubleshooting. I would need at least 16 of them for troubleshooting a word of code.
[img]
RobotShop.com sells them here: http://www.robotshop.com/vex-led-indicator-pack-1.html
DFRobot could make a much better version of this with two colors and a resistor so you could plug it in the Sensor Shields. They would be great little indicators for troubleshooting. I would need at least 16 of them for troubleshooting a word of code.
2011-01-26 11:49:46 Here is a schematic of what I imagine. If D is positive, the Green LED lights. If D is negative, the Red LED lights.
[img]
If D is configured as an input, both LEDs may glow very dimly but most likely be off if the resistors are large enough. I would suggest 1K-2K. These LEDs should not be too bright or draw too much current because people may want to light up as many as 8 of them at a time. 16 if possible. The LED could be two descrete 0805 LEDs like I drew or they could be one package with a dual LED red and green chip inside. Either way would work. The important part is the mechanics. The connector block they are mounted on has to fit side by side in the expansion shield so they can be no more than 0.1 inch thick and 0.3 inches deep. They can be as tall as you need.
I would be willing to pay $2 each and I would want at least 16 of them so $32 for me.
anonymous
[img]
If D is configured as an input, both LEDs may glow very dimly but most likely be off if the resistors are large enough. I would suggest 1K-2K. These LEDs should not be too bright or draw too much current because people may want to light up as many as 8 of them at a time. 16 if possible. The LED could be two descrete 0805 LEDs like I drew or they could be one package with a dual LED red and green chip inside. Either way would work. The important part is the mechanics. The connector block they are mounted on has to fit side by side in the expansion shield so they can be no more than 0.1 inch thick and 0.3 inches deep. They can be as tall as you need.
I would be willing to pay $2 each and I would want at least 16 of them so $32 for me.
anonymous 2011-01-25 04:22:58 HI peterstrobl:
Will look at this thing to find a proper way to make it. Thanks for the suggestion!
R2D2C3PO
Will look at this thing to find a proper way to make it. Thanks for the suggestion!
R2D2C3PO 2011-01-23 21:57:02 fj604, I need your help making a IrDA receiver driver. It would be similar to Arduino’s new virtual RS-232 software. IrDA is a communications protocol for PDA devices. It’s basically a modified version of RS-232 to communicate over IR. They shortened the pulse widths so it can flash the IrLED brighter and use less power. My application is to use the small inexpensive readily available PDA keyboards with the Arduino using DFrobot’s IR receiver board. It could also be used to receive data from a PDA. anonymous
anonymous 2011-01-23 21:40:30 Yes, This is just for low speed switching purposes. Programs that I later plan to use to drive large banks of relays. I've been working with I2C boards and also cascading multiple shift registers. There are so many outputs. I want to be able to see if my code is actually doing what I think it is. I have used a 16 channel relay board and just mostly watch the LEDs and put a lot of wear on the relays. Not really the prime thing for debugging. Little LEDs like this would be really helpful to just plug in and make sure you are outputting when and where you think you are. anonymous
anonymous 2011-01-23 16:45:57 peterstrobl, I honestly don't think that debugging with LEDs would be easy - serial port is much better for debugging, especially for logging variables etc. Are you seriously considering using 16 Arduino outputs for LEDs for debugging purposes? If you let me know what kind of project you are trying to make, perhaps I could come up with an idea? 
fj604
fj604 