JeeLabs Sourcing electronic components for synth-DIY "Not discontinued, you understand,just on a 52-week lead time." —Dan Mills Hardware Eurorack frames AKA Eurocard frames AKA IEC 60297 sub-racks. supermoduul.com have them cheap. Connectors 0.145" / 3.68 mm pitch Molex 1625 series. Male pins Molex 02-06-2103 (Digi-Key WM1000-ND, Farnell 1079887) Receptacle for male pins, 3-way Molex 03-06-2032 (Digi-Key WM1221-ND, Farnell 1593638) Receptacle for male pins, 4-way Molex 03-06-2042 (Digi-Key WM1222-ND, RS 679-4855) Switches Keyboard switches RS 664-581 (Cherry MX1A-A1NN) does not include a keycap, contrary to what the photo on the web site suggests. Passives Capacitors Dielectrics Potentiometers The most common types of shaft are : round, 1/4" (6.35 mm) ; round, 6 mm; "knurled" a.k.a "serrated" a.k.a. Curves a.k.a. laws a.k.a. tapers : the three most common curves are linear, log (a.k.a. One of the best deals there is on pots is the Alpha RV160 knurled shaft carbons. Some people prefer G&H or Song-Huei's 16-mm carbon pots. Beware of Piher pots. Anti-log pots
Servo Database - RC Servo Specs and Reviews BeagleBoard.org - default IBM1130.org: All about the IBM 1130 Computing System AVR Core :: Overview :: 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 Category: Processor Language: Development status: Stable Additional info: none WishBone Compliant: No License: Description Microcontroller core compatible with one used in AT mega 103 and written in VHDL. Features • Core features: – 32 x 8 general purpose registers – Twenty three interrupt vectors – Supports up to 128 Kb of program and up to 64 Kb of data memory • Peripheral features: – Programmable UART – Two 8-bit Timer/Counters with separate prescalers and PWM – Eight external interrupt sources – Two parallel ports Status The core was tested with several ASM and C programs.
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. Inductive Coupling uses magnetic fields to transfer power. In my research I found, that to transfer power in very complicated. It all starts with the transmitter. The secondary coil has a 0.02 uF capacitor. The primary coil creates a magnetic field, when another coil is placed near it, energy will be induced into it. Be in mind that i could not get a hold of a 0.02uF capacitor so i used two 0.01uF capacitors connected together.
PCB Order | 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! 4 layer orders are now every two weeks. I'm planning another beta 2-layer medium-run order on April 1st, 2013 for people that want at least 150 square inches of their boards. Order Status Keep up to date on the order status updates and to be notified of when the next order will go out: What is this? I've been coordinating a group circuit board order. It's $5 per square inch for three copies of your two layer design. Your two layer boards will be shipped within about 14 days of the order date. For four layer designs, it's $10 for three copies. Four layer boards will be mailed within 16 days. Who's eligible Although this was started primarily for the DorkbotPDX community, it's open to any hobbyist anywhere. Your order helps us continue doing it! What you get The Costs Help! Design Rules Enjoy!
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. Each symbol shows a part number and a part value or type. Connections: The connections between components are shown by lines. Figure 1.2: Various Ways of Depicting Connected Lines In the first example on the left, a dot shows interconnecting lines. Inputs and Outputs For stompbox designs, you almost always have an input and an output. So when you look at a schematic like this, you are dealing with a sort of shorthand that the schematic author used. Figure 2.1: Shorthand Depiction of Inputs and Outputs Figure 2.2: Mapping Shorthand to the Real World Power
Multimeter Help 2 Mike690003, What is your background? How deep an understanding are you looking for? A practical understanding of DC circuits is not difficult and learning to use the multimeter with DC will make perfect sense. Just through simple experimentation, after reading the accompanying manual, you'll learn a lot. AC circuits are a different creature and you'll need additional stuff and either a formal course or a good tutor to do serious work with AC. The best favor I did for myself years ago was take a self-paced, self-tested basic electricity course followed by a basic electronics course in a local trade school. If you're highly self-motivating you might try buying several self-paced texts with tests from a local book store. I'll bet somebody has a web-based, self-paced, basic electricity course. Also, the US Navy (and probably other branches) produce texts for sailors that anybody can buy.
Multimeter Help A multimeter is an electronics testing device that, um, tests multiple things, including resistance, voltage, and current. Using certain multimeter models, you can test to be sure that components — such as diodes, capacitors, and transistors — function properly. You can also troubleshoot your circuit to see where current is failing and pinpoint the problem spots. You don't have to break into your piggy bank to buy a multimeter. How a multimeter works A multimeter has a set of leads: a black one and a red one. Test leads that typically come with multimeters use simple cone-shaped tips. The two things you'll probably test most often with a multimeter are resistance and voltage. Reading resistance The problem with resistors is that manufacturers seem to expect you to memorize the color code that identifies the resistance rating. 1. 2. 3. If your multimeter reads 1, you guessed too low of a value. Measuring voltage Consider checking the voltage at the contacts of a battery pack. 1. 2. 3. 4.