Effects. Gainclone. Storage. Icsp. Make your own lump charcoal. I just came in from stacking apple wood in my backyard and I got to thinking, it should would be nice to learn how to make my own charcoal.
I waded through about 10 videos for you guys and found this very talkative fellow who showed a fairly easy method that appeared to be very efficient when compared to others. It seems there are 2 basic methods to making charcoal: The indirect method: In this method you don’t burn the wood but rather place it in some sort of container like a 55 gallon drum and then cook it with an outside fire source. Most of these methods seemed silly to me as it seems most people are using propane burners as their fuel source. Online : How-To: TV modulator from salvage. In need of a way to transmit a video signal to an aging antennae-input TV set, John rigged up a working RF modulator from salvaged parts (plus 5V supply) - I decided not to build my modulator from first principles.
A simple design with a UHF cavity oscillator and simple sound and vision carrier and modulation circuits is not impossible to make using parts from a scrap TV set, but when so many set top devices already have a modulator built into them why bother? Instead I lifted the RF modulator from a scrap Salora satellite receiver I picked up at a radio rally.
[…]To power this modulator I built a simple 5 volt regulator using the ubiquitous 7805 IC. I simply soldered a TO220 heatsink to the module case and built the circuit around it. You’ve likely come across one of the shiny metal modulators if you’ve ever disassembled a scrapped VCR – read on for more of details of the conversion over @ TechnoToad. Collin Cunningham collin@makezine.com Related. Stain PVC Any Color You Like. How to Attach a Ledger to a Cinder Block. Main Page. HOWTO: SSH Tunneling Made Easy. By Frank Wiles I was surprised at how long it took me to find a good HOWTO on setting up a simple SSH tunnel that I wanted to write up this Quick-Tip.
Using OpenSSH on a Linux/Unix system you can tunnel all of the traffic from your local box to a remote box that you have an account on. For example I tunnel all of my outbound E-mail traffic back to my personal server to avoid having to change SMTP servers, use SMTP-AUTH, etc. when I am behind firewalls. I find that hotel firewalls, wireless access points, and the other various NATing devices you end up behind while traveling often do not play nice.
Using PuTTY to create an SSH tunnel. Electrolytic Rust Remover. Electrolytic Rust Removal aka Magic. This is a relatively simple, safe and cheap way to remove light or heavy rust from any ferrous object.
I used this process to restore an old wood plane that I bought for $1 (it looked totally un-usable because of the rust). As opposed to grinding, heavy wire brushing and acid bath processes, this method removes none of the original steel and is not noisy or caustic. Online » Rust Box Advice. Chris Gammell: 7555, LM324, LM317, 10K, 1... How-to: Simple coin cell battery holder @Makezine.com blog.
How to make a Microphone Wind Screen (Zoom H2) Online : Homebrew IC Squisher makes DIP chips managable. Plasticine stamp printing. This is going to be a bit of an epic post as far as photographs go.
We had a lot of fun messing around with lumps of plasticine and an old stamp pad, and I figured you'd probably like to see a load of examples of what went on, to give you lots of ideas. I've always been rather fond of rubber stamps and my kids love playing with rubber stamps too, but they are expensive, and so we only have a set of upper case and lower case alphabet ones from their great grandpa Norman and a couple of random cheap plastic ones. If you are like us and want a cheap and creative alternative to an expensive rubber stamp collection then this might be just right for you.
I started off not with plasticine at all, but with a few of the red wax wrappers from babybel cheese. I was wondering if we could use them to make our own stamps with, so I smooshed them onto a lone Jenga block and made some patterns in it. The plasticine was much much easier for the kids to manipulate into the stamps that they wanted. 1. Controller in Minty Box for Water Valve. Posted Feb 07, 2012 at 1:07 pm This water valve controller is based on an Arduino which has the capability of accepting remote RF commands while controlling the valve solenoid.
A very popular casing among hobbyists is the minty box which encloses all the necessary components including an additional DC/DC step-up converter LT1303 that provides the needed +/- 24V of water valve. The converter raises the voltage from Li-Poly 3.6V to acceptable voltage for opening solenoid. Some MOSFETs are used to switch between +24V or -24V to the solenoid because of their power efficiency. An Arduino pro mini was used to program the valve since it was suitable and tiny. The 3.6V battery directly powers the circuit as the shutdown of LT1303 is controlled using the Arduino pin 6. For manual control of the valve, a front power switch was added.
Rest of the project Tags: minty box, water valve, arduino, RF, Online : WaterValveShield controls your garden spigot. First Ray built a minty water valve controller that gave him control over a garden water supply, then he turned it into a shield.
For the water valve, I picked the Orbit yard watering valve. It’s widely available in home improvement stores, and it is cheap. It has two pins: applying +24v opens the valve, and -24v closes the valve. It uses a latch solenoid, drawing power only when you open or close it. Samples Web Site. Easy $5 Water Guns. Conveniently, 1-inch PVC fits quite nicely inside 1 1/4-inch PVC.
These sizes of PVC make up the barrel and piston sections of this water gun. From one 10-foot length of PVC of each of the above mentioned sizes, you can make four 30-inch water guns or six 20-inch guns. The 30-inch guns are best for older kids and adults, whereas the 20-inch guns are easier for little kids to handle. Either way, the design is exactly the same. This design is pretty simple and easy to mass produce. In addition to the pipe, for each gun you will need the following: One 1 1/4" PVC end cap One 3/4" PVC plug One 1 1/2" rubber washer, with inside diameter near 1/4" (and it must be real rubber, not neoprene) One 1 1/4" fender washer, with inside diameter near 1/4" One 1" by 1/2" 90-degree elbow, or similar (see below) One 3/4" #12 pan head screw (or something similar that works) I say "not neoprene" because common neoprene washers would not work for me. Eric archer . net » Blog Archive » summer news.
Echo algorithm problem. There are 4 messages in this thread.
You are currently looking at messages 1 to . Is this discussion worth a thumbs up? Hi, I got some sample pseudo code of the net for an echo algorithm but I couldn't get it to work I made this function that takes in a 16bit sample, does math in 32 and then returns a 16bit sample output: void echo_sample(short in, short& output, int delay, float decay, int delay_size, int delay_buffer[]) { int i, j, s; int input = in; memset(delay_buffer, 0, delay_size + 1); for(i=0; i <= delay_size;i++) { if (i >= delay) j = i - delay; // work out the buffer position else j = i - delay + delay_size + 1; // add the delayed sample to the input sample s = input + delay_buffer[j]*decay; //just to be safe so that there is no 16bit overflow if(s > 32767) s = -32767; else if(s < -32767) s = -32767; // store the result in the delay buffer, and output delay_buffer[i] = s; output = (short)s; } } All I get is noise.
Let me know if you can see a problem. Thanks. "Jon Harris" <j... CMOS Synthesizers - Beavis Audio Research. Chip Basics For our experiments, we'll use a couple basic chips: 40106 Hex Inverting Schmitt Trigger: This chip contains 6 individual Schmitt triggers.
A Schmitt trigger is a comparator circuit that incorporates positive feedback. What this means is that when a high signal (positive voltage defined as '1') is applied to the input pin, the output pin generates a low signal (ground voltage defined as '0). This simple circuit can be connected to a resistor/capacitor pair to rapidly turn on an off. 4040 Binary Counter/Divider: This simple logic chip takes an input square wave and generates oscillations at 8 outputs with a frequency related to the input frequency. 4051 Eight Channel Analog Multiplexor/Demultiplexor: The voltage status of the three address pins A, B and C determines which of the eight channels presents its voltage to the common connection pin.