Search found 91 matches

by LukeW
Sun Feb 23, 2014 1:50 pm
Forum: Eleven
Topic: Bypassing the USB connector on the Eleven
Replies: 2
Views: 2797

Re: Bypassing the USB connector on the Eleven

Because the USB connector is a surface mount device, and so it the ATmega8U2, it might be relatively tricky to find places where you can easily, conveniently solder wires on from the USB cable. For the USB D+/D- lines, the most convenient place to get convenient, secure solder joints is probably at ...
by LukeW
Wed Sep 18, 2013 4:32 pm
Forum: Eleven
Topic: Eleven D13 LED
Replies: 0
Views: 2164

Eleven D13 LED

Today I noticed a little issue with the Eleven that was weird... after a minute I understood exactly what was occurring, but I just thought it was interesting that I'd never noticed this before. Has anyone noticed this before? If you're operating your Eleven in such a way that D13 is in a high-imped...
by LukeW
Thu May 23, 2013 3:43 pm
Forum: Product / Device Ideas
Topic: stackable I2C motor shields/brushed DC servo driver
Replies: 9
Views: 7074

Re: stackable I2C motor shields/brushed DC servo driver

This is immature, incomplete and untested, but you might find it of interest. It's a work in progress. https://github.com/lukeweston/OpenServoDrive Depending on the voltage and current your motor is running at, it's probably entirely unrealistic to get something that fits into an "Arduino Shield" fo...
by LukeW
Tue Dec 25, 2012 4:22 am
Forum: EtherTen
Topic: An example EtherTen application - PoE RFID access controller
Replies: 2
Views: 4472

Re: An example EtherTen application - PoE RFID access contro

https://www.sparkfun.com/products/10456 This is the solenoid valve I had laying around as shown in the above video, which is designed for 12VDC operation. You can also commonly get solenoid valves intended for garden watering automation from shops such as Bunnings (or whatever your local equivalent ...
by LukeW
Thu Dec 20, 2012 4:35 am
Forum: EtherTen
Topic: An example EtherTen application - PoE RFID access controller
Replies: 2
Views: 4472

An example EtherTen application - PoE RFID access controller

In this video, I've used an EtherTen from Freetronics to implement a RFID security controller which operates a solenoid door strike. http://www.youtube.com/watch?v=-hIXJy-Q7u0 (For this video, a solenoid valve is used as stand-in for a door strike solenoid, since I don't have one of those in stock r...
by LukeW
Thu Oct 04, 2012 11:31 am
Forum: Experimenters Kit
Topic: Corrections and updates
Replies: 2
Views: 4290

Re: Corrections and updates

Personally, for an educational/experimenter's kit like this, I would have specifically insisted, to the kit production / component sourcing team, that the resistors must be 5% E12 carbon film resistors, with the sand-coloured painted body and a four-band colour code. Why? Because the four-band colou...
by LukeW
Thu Oct 04, 2012 11:16 am
Forum: USBDroid
Topic: Using the USB Droid to program an ATmega328?
Replies: 1
Views: 3764

Re: Using the USB Droid to program an ATmega328?

Where that webpage says to remove the ATmega328 chip on the Arduino from its socket, what you're really doing is you're basically just using the Arduino's USB virtual serial port IC (FT232RL or appropriately-programmed ATmega8U2) as a USB-to-TTL-serial converter. You can do exactly the same thing us...
by LukeW
Thu Sep 06, 2012 9:03 am
Forum: Module Discussion
Topic: 24v input module ?
Replies: 1
Views: 1956

Re: 24v input module ?

What do you mean by a 24V input module?

A voltage regulator that can take a 24V input and regulate it down to some lower voltage, eg. 5V?

Does the existing PR28V module meet your needs?
by LukeW
Thu Sep 06, 2012 9:00 am
Forum: EtherMega
Topic: Stupid Question
Replies: 2
Views: 2664

Re: Stupid Question

On the EtherMega, the 3.3V rail is provided by a LD1117S33 regulator. These regulators typically have a maximum output current rating of 800-1000mA depending on exactly which manufacturer's datasheet you're reading. However, some of the 3.3V output current has to go to other things on the EtherMega ...
by LukeW
Thu Sep 06, 2012 8:51 am
Forum: Eleven
Topic: Cant upload a sketch larger than 4400 bytes?! [SOLVED]
Replies: 2
Views: 2848

Re: Cant upload a sketch larger than 4400 bytes?! [SOLVED]

I have read (although I'm not certain that this is true, and I haven't experimented with it to confirm) that you can't use an ATmega8U2-based Arduino (i.e. Uno-type Arduino) as an AVR ISP programmer using the ArduinoISP sketch. You have to, apparently, use an older FT232-based Arduino to get it to w...