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Tuesday, December 08, 2020

Heathkit Educational Kits

Heathkit was a well known supplier of electronic kits from 1947 through the early 1990's (although no new kits were developed after 1986). An incredible number of kits were offered including test equipment, amateur and SWL radio, audio, televisions, computers, robotics, automotive and other items difficult to categorize.

Heathkits - Learning with Practical Electronics

THD Improvement kit for IG-18 series audio generators

THD Improvement kit

"The meter buffer is a crucial part of improving the THD specification of the IG-18. The non-linear loading of the analog output can create additional harmonic components due to the non-linearity of the diodes used to drive the meter."

History and Antiquity

In 1947, Heath introduced its first electronic kit, an oscilloscope that sold for US$50 -- the price was unbeatable at the time, and the oscilloscope went on to be a huge seller.

The Heathkit Virtual Museum, a tribute to the Heathkit era-a time when building electronic kits was a favorite pastime for many electronics hobbyists. This commemorative virtual showcase takes you back to the Heathkit age which began in the late 1940's and lasted through the early 1990's.

Then you ought to look around at Bill Wilkinson's Heath Company Page if you want to know more.

Runoffgroove - DIY Articles and Schematics

Here are many Audio Effects and Music DIY electronics Articles with Schematics and idea behind the concept. Electronic Music Enthusiasts will find these useful for learning.

Runoffgroove - DIY Articles and Schematics

Some Entertaining Projects are -

Mr. EQ - A simple, yet potent DIY equalizer. Schematic, PCB/perfboard layouts, and photos.

Little Gem - Two 9v battery-powered amps based on the LM386. Schematic and PCB/perfboard layouts.

Eighteen - The Marshall 18W adapted for use as a distortion stompbox. Schematic, PCB/perfboard layouts, and photos.

Tonemender - An ultra-flexible tonestack with clean boost. Schematic, photo, and PCB/perfboard layouts.

Runoffgroove - DIY Articles and Schematics

Thor - The legendary Marshall 100W Super Lead adapted for use as a distortion stompbox. Schematic and PCB layout.

The Thunderchief project, released in March 2004, was the first runoffgroove.com circuit that was developed using the tubes-to-FETs process. Enlightened and inspired by Doug Hammond's excellent Meteor circuit, we used the same approach in an effort to capture some of the legendary magic of the Marshall Super Lead. The circuit's performance pleased us, but there were issues.

Splitter-Blend - Dual parallel buffered effect loops with blend control. Schematic and perfboard/PCB layouts.

Professor Tweed - The Fender Princeton adapted for use as a distortion stompbox. Schematic, PCB/perfboard layouts, and photos.

Friday, December 04, 2020

SpikenzieLabs - Kits and Projects

It is nice to see many building solutions over the Arduino base like this Prototino. Both hardware and software of Arduino are Extensible. This gives opportunity for New tools and Solutions over this compact system Framework.

One Idea can be an Arduino with a CPLD and Universal I/O driver for robotics. This can come with a Visual IDE which is close or better than the old Visual Basic 6 in usability.

An Youngster can just Drag Drop Components and Link them to build his Robot or Home Automation Solution. Robotics Designers can have the option of looking at the code/hex if needed.

delabs Notes

Prototino an Arduino clone for Prototyping

 The Prototino is an Arduino clone with a built in prototyping area. Designed to make a permanent version of your project once you have perfected it on a breadboard but without the expense of embedding your original Arduino into your project.

Prototino an Arduino clone for Prototyping

The Prototino also makes your project more reliable and robust. With the prototyping area integrated into the board with the microprocessor, your project will have fewer boards and fewer wires, and because of that, fewer mistakes and fewer shorts. 

SpikenzieLabs - Kits and Projects
6135 de Maisonneuve West, Suite 12, Montreal, QC H4A 2A3, Canada.

Sunday, November 01, 2020

Linear Regulated Dual Polarity Power Supply

"This document describes how to construct a dual polarity linear power supply which can be configured for any positive or negative voltage between 1.2-35V. A power supply is the fundamental building block of all but the simplest of electronic devices. It converts the alternating current (AC) from our wall outlets into direct current (DC) at some specified voltage. Because so many electronic devices need DC to function properly, a versatile power supply is the perfect addition to a hobbyist's collection of test equipment. "   from Wayback Machine

 Linear Regulated Dual Polarity Power Supply

Linear Regulated Dual Polarity Power Supply

"There are two versions of the power supply which are fundamentally very similar. The first is a compact fixed-voltage supply measuring 2.9" x 2.2", which is well suited for applications requiring small size and modest current capacity like TTL logic circuits or op-amp based projects such as active crossover networks. The second is a larger (4.6" x 2.25") variable supply sporting more robust heatsinking, and the regulators are positioned such that they may be mounted to a large chassis heatsink for even greater heat dissipation. And since this version of the supply is variable, it is ideal for experimenting. See the photographs near the bottom where I built one into an ATX power supply chassis."

Wireless Phone and your Arduino

We all have phones and we can create apps too. This makes a Arduino a bit isolated without connectivity.

Using some of these Shields you can gift Smartphone Power to your Arduino. Create a Home Automation System with a Smartphone App control. An interactive Robot with SMS. Create a Process Automation System with SMS Alerts too.

3G + GPS shield for Arduino - https://www.cooking-hacks.com/

3G GPS shield for Arduino
Connect to high speed WCDMA and HSPA cellular networks. Make web interactive project like the "Internet of Things". The module counts also with an internal GPS what enables the location of the device outdoors and indoors.
  • HTTP and HTTPS (secure mode) navigation, download, upload to web server.
  • FTP and FTPS (secure mode) protocols are also available.
  • Send and receive mails  from Arduino using the SMTP and POP3 clients. 

Wide Skill Spectrum by Building a Robot

These valuable learning materials are partly derived from Robot Builder's Guide of Fred Martin, the course notes at the Massachusetts Institute of Technology.

Wide Skill Spectrum by Building a Robot

Basic Mechanics— Describes basic mechanics, friction, and the simple machines that comprise the building blocks of more complex machines, like robots.

Sensor Design -  Without sensors, a robot is just a machine. Robots need sensors to deduce what is happening in their world and to be able to react to changing situations. This chapter introduces a variety of robotic sensors and explains their electrical use and practical application.

Wide Skill Spectrum by Building a Robot

Robot Control - The most common kind of robot failure is not mechanical or electronic failure but rather failure of the software that controls the robot. For example, if a robot were to run into a wall, and its front touch sensor did not trigger, the robot would become stuck (unless the robot is a tank), trying to drive through the wall. This robot is not physically stuck, but it is "mentally stuck"

delabs Notes

When you build a robot, you are dealing with Mechanical, Electrical, Electronic and Computer Technologies with the Interfacing.

The improvement in the Wireless Communication, Low Power Hi-Speed Semiconductors coupled with compact gigabytes of Flash/HDD may help build a Creative Robot with a smart brain.

Tuesday, October 06, 2020

Hobbyist Dream - Weller Soldering Iron

Rework/repair tools, soldering guns and irons and accessories. 60 Watts, 240v Temperature Controlled Soldering Station. This is My Iron and a stand i made.

Hobbyist Dream - Weller Soldering Iron

There’s no mystery about soldering; it’s as easy as you make it. Follow a few simple rules, and metal joins metal like magic. This little book gives you the rules in pictures—with as few words as possible. All you need do is follow through, step by step, and youll solder sound joints. 

 Weller Soldering Tips : Your Guide to Easier Soldering

 History - "Cooper Industries origins extend back more than 170 years to a small iron foundry in Mount Vernon, Ohio, started by brothers Charles and Elias Cooper in 1833. Today, Cooper Industries has become a leading worldwide manufacturer of electrical products and tools and hardware."

Electronic Product Production and Manufacturing

Some Features

  • PU240T power unit,
  • TC201T soldering pencil,
  • PH1201ESD stand and sponge
  • A lighted rocker switch indicates on/off status
  • Comes with PTA7 tip
  • ESD safe to protect sensitive components
This is close to what i have, which is WTCP-S

QRP and homebrew by DL2YEO

"My name is Udo and I am living in the small village called Spenge, about 15 km north of Bielefeld. The DARC radio club is 'OV Widukind - N59' and the locator is JO42FD. I spend a part of my freetime with designing circuits and home-brewing electronic devices..."

QRP and homebrew by DL2YEO 
  • Front Panel Design
  • Some useful Tables
  • 13.8 V / 15 A from a PC
  • 250 W S.M.P.S.
  • Analogue Frequency Display
  • Oscillators

QRP and homebrew by DL2YEO 

"The electronics industry uses several methods for labelling front panels and enclosures, including screen printing, press forming, erosion, lasers etc.. The common factor of these techniques is that they are generally beyond the home constructor. Having these parts specially made commercially can be very expensive, and the only alternative is standardized scales and fonts."