The arduino library supports A/D conversion at about 13 KHz, not fast enought for a useful audio-rate oscilloscope. Rewriting the acqusition loop to directly access the ADC reqisters speeds up conversion (including loop overhead) to about 688,000 samples/sec,...
The photo of the horrible wires all over the bottom of the board is from the left channel amplifier board and was taken when I got it. The first thing I did was remove all that and put it back to as near stock as possible (some of the tracks had gone,...
The time consuming part was sewing on the EL wire. The power pack sat in the inside chest pocket, and I cut small holes to feed the wires into the jacket lining. I used clear nail polish on the holes to stop them from fraying. Luckily the fabrics were...
Audio filter implementations All of these implementation use a multiply-and-accumulate (MAC) scheme to compute each of the terms on the right side of the following equation, then divides by a(1), if necessary. Some of the implementations are serial,...
by tEEonEIntroduction I love racing games, and along with the Xbox One came Forza 5!The few steering wheels for XB1 are super expensive and bulkyThe XB1 controller is a new device and i was dying to take one apartI had a spare SRW-S1 lying aroundI thought...
Features:Wind up rotary encoder with wind up clicking sound effect.External input for button or other trigger mechanismDeep sleep mode when not playing to conserve battery for many years of life on 2 AA batteriesCan hold about 3 - 4 minutes worth of...
Matlab code considerationsThe following considerations will be illustrated using a Matlab program which computes Conway's life. Parts of the code are explained below.Matrixes and images can be converted to one-another, so display is straighforward. If...
The plan here is to build up intuition for HiD representations in parallel coordinates:points -- The basic representation of points as lines in PC.lines -- The observation that lines map to points in PC.planes -- Hyperplanes can be detected visually.clusters...
The whole project kind of evolved from the initial idea of making something "awesome". A main catalyst were some favourite sayings of the intended recipient. In addition to the "no kill switch on awesome", he was fond of "Me want cookie" (to counter-act...
The case I picked up from Harbor Freight. I removed the top and bottom dividers and went to work. The bottom is framed in 1/4" wood for added strength and stability. The top also has a reinforced frame. On the outside are a video in, video...
Making GSM phone utilizing GSM modules is not that complicated. One needs to use MCU with UART and few IO lines and then truckload of patience for writing decent parser of AT commands - that can be nightmare to do correctly. For this construction, I...
Attiny45 using a DS18S20 to sense room temperature and control an RF controlled mains powerrelay.Think of the hardcoded set temperature as a safetyfeature.Feeding the circuit with 12 volts since the RF remote uses that.7805 with its recommended caps...
From the Latin, "Docta Vox" meaning "learned voice" or something like that according to Google Translate. It sounded cool and I'm bad at naming things anyway. So there you have it. This project uses Processing with STT (speech to text) and TTS (text...
A Dollar Store Switch Mode Buck Power SupplyKarl Berger, W4KRLWhile cruising the aisles of a newly opened dollar store I discovered an automotive cigarette lighter adapter with two USB connectors to charge a cell phone or other device. The nameplate...