There are plenty of LCD options around 3" with resistive touch available, under $10. Is there anything low cost with capacitive touch? All I can find is relatively large and expensive ones, having to spend $50 or more. Anyone know of something in...
I have built a circuit that doesn't work. (This is not unusual for me.) The circuit uses relays to count pulses from an old rotary phone dial... or is supposed to. I'm using a combination of the following circuits from http://www.electronixandmore.com/projects/relaycomputertwo/index.html (their...
I have a CalComp Techjet5500 available for someone who can put it to good use.This is a hacker special, since I got it because it wasn't working properly. As I recall the problem is that one of the optical paper feed position switches failed, causing...
Apparently, one of my neighbours has "revalved" his amp.I'm surrounded by musicians so apparently, one of them has changed all the chinese tubes with slovak ones. He conveniently left the original tubes in the common space. I end up with (equivalents...
Do y'all have experience with these...?We're talking the sort of chip where you can, say, send a configuration via I2C/SPI and the chip will generate an output-clock anywhere from 1MHz to 200MHz...I tried looking for something at the #Common Parts Library,...
Can someone point me to a decent introduction to home automation options?I've just bought a house. I'd like to set up some home automation, mostly heating and lighting, but even as a professional control systems engineer I'm finding the landscape...
Liveboot is still useful, small utilities can liveboot and run wonderfully as a system to learn on, sandbox small projects on, or even to install from or repair systems with. We've even got some hacks for persistence, where your settings stay the...
I'm searching for a word that adequately describes the blackhole of engineering time, when you spend the whole night looking for a component, comparing the host of "not-quite-perfect" features. Regulators are the perfect example! If it's got a perfect...
Let's say someone uploads something like the details of a protocol, the BOM/devised schematic of a product, details of how to run custom code on a games console or a replacement firmware for a device. Then a company asks either nicely or not so nicely...
relay server, i just built and setting up 4 servers, going to be also adding on gsm/cdma/web/text terminals that i will then beable too voip the server then through the terminals, have my own cell service, there are more compoents invold. no need to...
I am a beginner in the embedded programming. I have done some engineering projects using ARM7 microcontroller. Now I have a new project developing the software for hand-held billing machine using ARM microcontroller. So I just need some help regarding...
I hope this is the right place to post this. I'm building an 8x8x8 single color LED cube. I've built test circuits on a breadboard and it works. However, I'm disappointed that the LEDs are much dimmer than when they're not multiplexed. It makes sense...
I am developing a BLDC controller. The original motor that I was given seems to be causing problems so I want to ask the community what kinds of motors they would want to use with OpenBLDC. I am thinking of just buying one of the outrunners 3-phase motors...
I am sure that anyone with experience my have several questions as to why I have done some of the things that I have done in my board designs, and the answer to that is simply because I am making it up as I go along. Those details will hopefully work...