Search found 91 matches
- Mon Mar 03, 2014 4:03 am
- Forum: LeoStick
- Topic: Connecting SD card to Leostick
- Replies: 5
- Views: 5963
Re: Connecting SD card to Leostick
Let's try the following: First column is the pins on the LeoStick ISP header, oriented as in the picture posted above. Second column is the pins on the Adafruit MicroSD board. Pin 1 (top left) = "DO" Pin 2 (top right) = "5v" Pin 3 (centre left) = "CLK" Pin 4 (centre right) = "DI" Pin 5 (bottom left)...
- Mon Mar 03, 2014 3:48 am
- Forum: LeoStick
- Topic: Connecting SD card to Leostick
- Replies: 5
- Views: 5963
Re: Connecting SD card to Leostick
Whatever you're using to power the LeoStick with can also be used to power the SD module, only one 5V supply is needed. But yes, they do need a common ground if two different power supplies are used. So you're only using the USBBoost to power the SD module alone, not the whole system? To be honest I...
- Mon Mar 03, 2014 3:35 am
- Forum: LeoStick
- Topic: LeoStick Mass Storage Device
- Replies: 3
- Views: 9379
Re: LeoStick Mass Storage Device
Basically, I used the code from this person: http://www.instructables.com/id/Music-Playing-Alarm-Clock/step6/USB-Mass-Storage-with-MicroSD/ You should edit /Lib/sd_raw_config.h , and set up the pins appropriately for SPI on the microcontroller you're using, including your choice of nCS. If using a L...
- Thu Feb 27, 2014 5:16 pm
- Forum: Random Chit-Chat
- Topic: Uploading code via USB-Serial Adapter
- Replies: 4
- Views: 6320
Re: Uploading code via USB-Serial Adapter
2 x 22 pico Farad Capacitors - between crystal and X1 and X2 pins on MCU It's not clear from the way you've worded it - but just checking. The crystal should be connected directly to the X1 and X2 pins and the capacitors should be connected from those pins to ground. The capacitors should not be "b...
- Thu Feb 27, 2014 7:06 am
- Forum: LeoStick
- Topic: A working avrdude config for LeoStick
- Replies: 8
- Views: 12270
Re: A working avrdude config for LeoStick
Hmm, it works just fine for me on OSX, running avrdude from the command line, programming a LeoStick with a Freetronics USBASP. avrdude -p atmega32u4 -P usb -c usbasp -U flash:w:filename.hex Obviously this depends on your programmer type - yours may vary, specify it appropriately. The port needs to ...
- Thu Feb 27, 2014 6:57 am
- Forum: LeoStick
- Topic: reading analogue voltages
- Replies: 3
- Views: 5097
Re: reading analogue voltages
Cef, if your application specifically demands a 2.4996666999970375e-7 ohm resistor then I think you've got bigger concerns than the accuracy of the code on the website. 

- Thu Feb 27, 2014 6:55 am
- Forum: LeoStick
- Topic: using leostick to "insert" text into video
- Replies: 2
- Views: 3865
Re: using leostick to "insert" text into video
There's also the MAX7456 which does this sort of thing using minimal external components and resources, just SPI control from a microcontroller and composite video in and out from the chip. http://www.maximintegrated.com/datasheet/index.mvp/id/5516 You should be able to control this from a LeoStick ...
- Thu Feb 27, 2014 6:44 am
- Forum: LeoStick
- Topic: LeoStick Mass Storage Device
- Replies: 3
- Views: 9379
LeoStick Mass Storage Device
In the attached image you can see a quick little project I whipped up today, which might be of interest. This uses a LeoStick as a development tool for a quick test of some code I'm developing, prior to actually developing the custom board for this project. The LeoStick (which is modified for 3.3V o...
- Sun Feb 23, 2014 2:05 pm
- Forum: Module Discussion
- Topic: Vary Voltage/Current of Shift Register Outputs?
- Replies: 13
- Views: 14207
Re: Vary Voltage/Current of Shift Register Outputs?
Can you post a drawing or schematic of what you've set up?
- Sun Feb 23, 2014 1:56 pm
- Forum: Eleven
- Topic: Regulating AMPs
- Replies: 4
- Views: 4379
Re: Regulating AMPs
A device that runs at, say, 6-12V and draws a current of, say, 100mA doesn't need its current regulated to 100mA by the power supply - that's just the amount of current that it draws. The power supply needs to be capable of supplying 100mA, or more, but the power supply doesn't actually supply 1A (l...