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Exactly 100 ticks/sec with a "wrong" crystal
This is prompted by the "Exact one second delay" thread, and a problem I actually had to solve in the past. The problem: 20 MHz crystal ~10ms system tick using 8-bit timer...
Tuesday, 24 July 2012 - 15:51
Need a wireless keyfob (transmitter) and receiver
For a prototype, I'm looking for a wireless keyfob (if I'm using that term correctly) with a few buttons (number not critical) and associated receiver. Output of the receiver is...
Friday, 6 July 2012 - 17:29
Any extra cost for PCB components not at right angles?
I have a PCB where it would be a real benefit to lay out some components (e.g. 0603 resistors) at angles other than 0/90/180/270. I believe in the distant past there was an...
Sunday, 10 June 2012 - 01:50
Strange single-bit programming error
I've been programming up a set of prototype boards containing a mega48. All boards but one programmed correctly, sometimes after first failing due to soldering errors caught...
Tuesday, 22 May 2012 - 00:39
Experience with having custom plastic cases made?
Another question, since you guys know so much. What is the current situation regarding having plastic parts made? I'm looking for a round battery box with a switch and maybe a...
Tuesday, 8 May 2012 - 21:43
Any tips on taking video of PWM-ed LEDs?
I need to make some videos of some PWM-driven RGB LEDs, but I'm finding that I get artifacting between the PWM rate and the video rate. The effect is vertically rolling...
Tuesday, 8 May 2012 - 15:46
Need some basic IR controller info
I have a simple control box for some equipment that reads 4 buttons (up/down/left/right) and sends a datastream encoding the buttons to the equipment. Now I want to look into...
Thursday, 19 April 2012 - 15:48
Any experiences with Kickstarter?
Has anybody had any experiences with Kickstarter, the project fundraising website? I'm asking because I've designed and built a 3cm x 5cm AVR board with onboard RS485, and I'm...
Saturday, 14 April 2012 - 14:32
Free PLC front end?
No idea if such a thing exists, but I'm wondering if there are any PLC front-end software packages out there that compile user-entered ladder logic to some documented intermediate...
Wednesday, 4 April 2012 - 15:25
Regulate 4.5 - 6.4V to 5V?
I don't know much about switching regulators, hence my question. I want to run some hardware at 5V, off a 4-cell battery pack. Using alkaline batteries the pack voltage would...
Saturday, 17 March 2012 - 19:42
Connect analog input to ISP pin - possible?
I'd like to use one of the pins of the 6-position ISP connector (probably SCK, since it's on the same side as Vdd and GND) as an analog input. Chip family is mega48/88, so no...
Wednesday, 25 January 2012 - 03:03
Need an adhesive solution
I need to adhere some thin wires (24-26 AWG, 2 or maybe 3 wires, twisted or zip) to the back of some decorative metalwork. What I'd like is something that is easy to apply and...
Monday, 9 January 2012 - 18:10

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