Search found 106 matches

by cef
Sun Jan 19, 2014 9:51 pm
Forum: EtherTen
Topic: Max current from onboard regulator
Replies: 4
Views: 3553

Re: Max current from onboard regulator

Since the 802.3af reg does 1.5A, you could always regulate down a second 5V supply. You'd need to keep them independent, but you could (in theory) drive another ~600mA off that (leaving yourself with 100mA headroom for overhead for the regs to use - which should be a lot less but probably wise if yo...
by cef
Thu Nov 28, 2013 12:26 pm
Forum: HBRIDGE: H-Bridge Motor Driver Shield
Topic: Connecting HBridge to an external 12v source
Replies: 5
Views: 5023

Re: Connecting HBridge to an external 12v source

Thoughts:

Have you tried connecting the 9V battery directly to the power input on the HBridge shield?

Have you tried hooking the 12V external supply to the Arduino DC socket?

Note: Make sure you get the polarity of the power input to the HBridge shield the correct way around.
by cef
Sat Nov 09, 2013 4:52 am
Forum: OLED128 Display
Topic: Raspberry Pi: How to diag?
Replies: 5
Views: 5333

Re: Raspberry Pi: How to diag?

Sounds like the module hasn't been installed properly, or you're not running the kernel the module should have been compiled against. You should have a look through the entire list of kernel modules (.ko files) to see if there are any fbtft_* modules. You can go to the directory by running: cd /lib/...
by cef
Thu Oct 31, 2013 10:14 pm
Forum: Module Discussion
Topic: 8 Channel Relay Driver Shield
Replies: 11
Views: 9898

Re: 8 Channel Relay Driver Shield

Great to hear you got it solved mdance.
by cef
Sun Oct 13, 2013 9:31 pm
Forum: Project Showcase
Topic: Improving ADC resolution
Replies: 17
Views: 20792

Re: Improving ADC resolution

Very interesting. I'd definitely be interested in seeing more.
by cef
Wed Oct 09, 2013 9:07 pm
Forum: Module Discussion
Topic: 8 Channel Relay Driver Shield
Replies: 11
Views: 9898

Re: 8 Channel Relay Driver Shield

No, the Arduino and the rest of the shield should be fine. If you know someone really good with a soldering iron, you could possibly get them to replace the FET on Ch 1 (Q1, nearest the S in the label "Freetronics" on the component side of the board). They're 2N7002 FETs (SOT-23 package), which are ...
by cef
Wed Oct 09, 2013 6:49 am
Forum: Module Discussion
Topic: 8 Channel Relay Driver Shield
Replies: 11
Views: 9898

Re: 8 Channel Relay Driver Shield

Sorry to say that you have probably burnt out the FET on Channel 1. For measuring voltage, you put the meter across the load (as you have done). For measuring current, you need it in series with the load. When in voltage mode, the meter has a high resistance, so it doesn't draw too much current in t...
by cef
Sun Oct 06, 2013 5:16 am
Forum: Goldilocks
Topic: Arduino IDE Tools/Board menu scrolling
Replies: 2
Views: 4863

Re: Arduino IDE Tools/Board menu scrolling

You could try the ERW release of the Arduino IDE. http://code.google.com/p/arduino-erw/ Note: This is NOT an official version of the Arduino IDE, just someones attempt at fixing some specific issues (ERW = Enhanced Release for Windows). I really wish Arduino would incorporate some of these fixes, as...
by cef
Sun Oct 06, 2013 2:29 am
Forum: LeoStick
Topic: LeoStick does not work with USB3 ports
Replies: 5
Views: 4711

Re: LeoStick does not work with USB3 ports

This is starting to sound like it might be a USB3 chip-specific driver issue (ie: the driver for the chip on the motherboard).
by cef
Thu Oct 03, 2013 3:00 am
Forum: LeoStick
Topic: reading analogue voltages
Replies: 3
Views: 4506

Re: reading analogue voltages

For simple DC voltages, you can use a voltage divider made from 2 resistors. For this, you need a resistor between the voltage you want to measure to the analog input on the Arduino, and then another resistor between the analog input and ground. For 15V, you can use a 20K resistor (between voltage y...