DorkbotPDX Instead of a weekly order, 2 layer circuit boards are now sent to the fab when the panel fills up. This means panels are going out 2 to 3 times a week instead of just once a week. Contents New ordering website! BEAM Heads 101 First let's examine how the HLO operates, without using the IN signal, behaving like a classic CMOS astable oscillator. The oscillator consists of 2 inverters with the input of inverter A serving as a summing node for several signals. As can be seen, a 5M potentiometer (R1) is connected from the output of inverter A back to it's own input. Because of the signal inversion, this is DC negative feedback, which tends to drive the input voltage of inverter A towards its 1/2V+ threshold.
Wireless Power A few years ago MIT created a system for transferring power wirelessly. They transmitted power over a two-meter distance, from the coil on the left to the coil on the right, where it powers a 60W light bulb. Back in 2006, this was a pretty cool thing. You can only imagine what the implications of something like this would be. Well, unlike most of us, we do not have the time or material goods like MIT has. ATX Bench Power Supply — Russell Jones Here is a very useful bench power supply that I made from an old ATX supply. I will not re-iterate what has been done before (look at ATX -> Lab Bench Power Supply Conversion on Instructables for a great discussion). I made this while at college in their well furnished machine shop. The pictures are self-explanatory. I spent about $3.00 on the rocker switch and military cover. The rest was trash or free.
OpenCores Details Name: avr_core Created: Nov 5, 2002 Updated: Feb 4, 2014 SVN Updated: Oct 28, 2012 SVN: Browse Latest version: download Statistics: View Other project properties ATX to Lab Bench Power Supply Conversion First, a bit of background on a typical ATX power supply: Computer power supplies are Switch Mode Power Supplies (SMPS), which use high-frequency switching circuit elements to provide a high-quality output voltage, with good energy efficiency. One side effect of this technology is the minimum load requirement that each power supply has. In order to function properly, the power supply needs at least a very small electrical load connected to it.
Sourcing electronic components for synth-DIY "Not discontinued, you understand,just on a 52-week lead time." —Dan Mills Hardware Xenon Flasher This discussion covers 3 different Xenon flashing circuits from disposable cameras. From them, you will learn circuit tricks that have NEVER been shown in any theory book. The first circuit covers 6 BUILDING BLOCKS. You will need an old "disposable Flash Camera" plus two extra parts to carry out the modifications. No kits are available for any of this discussion. Schematics Guide You can see that there are various bits represented by symbols, all connected in various ways. Let’s look at some of the big picture concepts: Left to Right: The first thing to notice is that you read the schematic left-to-right: the input on the left feeds the signal through parts and pathways in the middle to an output on the right. This left-to-right convention is not universal, but it is probably the most common layout for a schematic. Power and Ground: The top area of the schematic shows some type of power (in our case, 9 volts Direct Current, the same thing that comes out of a 9 volt battery).
Compact fluorescent lamp Menu Introduction Compact fluorescent lamps have some benefits in comparison with classic light bulbs. It is lower power consumption (to 80%) and much longer lifetime (5 to 15 times).