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OT: PCB heating for outdoor LCD contrast
Hi All - I have a project here that will use a Mega16 and a 4x40 LCD - this will be sitting in a generator shed outdoors, where it can get pretty damn cold. I've already seen how...
Monday, 27 February 2006 - 21:54
Project query: CueCat barcode scanner
Hey All - I'm sure most people here are more or less familiar with the CueCat barcode scanner and the fiasco that went with it a couple of years ago ... I have a couple here at...
Thursday, 29 September 2005 - 16:24
Guesstimating cpu usage as you prototype
I'm looking for some ideas on how you guys do this. That is, as you prototype, build hardware, crank code, how do you figure if your cpu or clock has enough cycles to do all the...
Monday, 2 May 2005 - 22:14
Slightly OT: Choosing battery technology
Hi All - I'm trying to decide on a battery technology to use for a project - it needs 2.7V min, though it can take up to 5.5V. The case it's going in will fit two AA batteries (...
Sunday, 27 February 2005 - 04:45
OT: LCD contrast adjustment for temp
That generator info display project will have a box sitting outside in a shed - one that can get bloody cold during winter. LCDs are very temp-variable, and need their contrast...
Wednesday, 9 February 2005 - 23:24
OT: Measuring volts and amps of batteries in series
Hrm, not sure how to approach this. I want to measure the voltage on each of four 6V batteries that are in series for 24V. These are part of a UPS backup system, and I want to...
Friday, 28 January 2005 - 15:53
OT: Very OT. Carving up plastic project boxes
Hi All - Most small projects wind up living in small project boxes, usually plastic boxes from Rat-Shack or similar. Drilling holes for pushbuttons and so on is pretty easy....
Saturday, 4 December 2004 - 23:46
Choices in power supplies
Hi All - My daughter asked if I could build her a small timer - very simple. Just three 7-segment LED displays and a button - push the button and it wakes up and counts down,...
Thursday, 25 November 2004 - 03:49
Info display for generator/inverter setup
Hey All - Well, I'm toying with starting yet *another* project ... We have a 12kW diesel generator here, connected to a Trace/Xantrex inverter with several large batteries. Kind...
Sunday, 3 October 2004 - 21:27
OT: Slightly - looking to design engine info box
Hi All - Well, the gauges (minimal as they were) on my diesel generator finally gave up the ghost last week. They were cheap Chinese mechanicals, so it's really no wonder they...
Tuesday, 22 June 2004 - 23:35
OT: LCD backlight control
How do you guys handle the LED backlight on typical LCDs ? For example, one project I have here uses a nice Optrex DMC16202 display, 16x2. Not too big, just right. The backlight...
Saturday, 29 May 2004 - 23:03
OT: How to measure voltage with 2313 ?
Hi - Given that the 2313 doesn't have an ADC, what would be the best way to measure a voltage fairly accurately ? I know about using the resistor/cap combo and timing the charge/...
Wednesday, 26 May 2004 - 21:05

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