Solderman Basic Electronics

Basic Electronics, Practical Electronic Projects, Learning Circuit design, Electrical Fundamentals. Edutainment and Interactive Examples.

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Monday, April 21, 2008

VU Meter Circuits and Projects

Here is a collection of web pages of VU Meter projects that helps a newbie getting into the Electronics DIY Hobby Land.

VU Meter Circuits and Projects

A Hobby now in your School days or College can help you build a strong profession later. It is Edutainment that will make productive use of your spare time. Friends can do it as a group, during holidays. Parents should encourage healthy hobbies, as the children will grow in a positive and creative atmosphere.
This is a very eye appealing audio accessory. Displays an approximate output level for each channel of a stereo amplifier. Connects to the speaker terminal; levels are displayed in ten steps. User may select either a moving dot bar appearance. Uses two LM3915 IC's; includes a discussion of measuring audio power.

Friday, April 11, 2008

Electronics Club - John Hewes

A website for anyone wishing to learn about electronics or build simple projects. Written for beginners but used by many others as a quick reference.

Example Projects, Construction of Projects, Soldering Guide, Study Electronics, Electronic Components, 555 Timer and Circuit Symbols.

Electronics Club - John Hewes

This is good place to start your electronics study, it has a practical and simple Approach - delabs

Electronics Club - John Hewes

Starter kit of parts

If you are new to electronics and would like to try adapting published projects, or designing and building your own circuits, you need to have a small stock of components available.

Monday, April 07, 2008

Miami Museum of Science - The Atoms Family

This resource contains educational activities about energy concepts, the power of the sun, energy conservation, energy transformation, electricity and fossil fuels being presented by famous gothic horror characters.

Miami Museum of Science - The Atoms Family

Electrical Safety - Static Electricity - Fruity Electricity.

Miami Museum of Science - The Atoms Family

Flying a kite near any kind of overhead wires is VERY DANGEROUS! The overhead wires could shock the kite, the electricity would then travel down the kite's string and shock you!

Atoms Family - Frankenstein Lightning Lab

Only electrical plugs should be put into electrical outlets. Never place anything else into an electrical socket, it may shock you or start a fire!

Lamps use electricity to make light and can get very hot! If things get to close to a hot lamp they can catch on fire!

Hair dryers and water don't mix, and can be very dangerous! Never use a hair dryer near water and never place a hair dryer in water.

Saturday, April 05, 2008

Three Phase Solid State Relay

This is R-Y-B three phase 40A 440V AC Solid State Relay with 3-30 V DC Control Signal. It has Built in HeatSink and Fan. It is good for Controlling a Bank of heaters. This model could go upto 120A with SSR's in parallel for Proportional Control.

Solid State Relays SSR.

This is a Contacter replacement, it will switch R-Y-B phases. It is a high power SSR. In some places
it is unwise to use an SSR, a Electromechanical Contacter will perform better. The merit of SSR is fast switching, no wear and tear. No dust humidity influence.

Three Phase SSR

Tacho Counter for Speed and Quantity Measurement

This was a Custom Built Product for Converting a 10-100 V Signal from a Motor Tacho to pulses, to indicate the distance moved by Conveyor belt with Job Material. The Digital Indicator would indicate the speed and the Mechanical Counter would Log Quantity of Materials Moved.

Process Control Instrumentation

Tacho Counter

The voltage was first brought down to low levels with an attenuator and zener protection. A VCO and a monostable created a train of pulses. These pulses drive a darlington transistor pair which operates the Electromechanical Counter that has a Solenoid. The voltage is also scaled, calibrated and displayed on a Digital Voltmeter.

The circuits are partially shown here, two versions.

Voltage to Frequency Converter ICL8038

In this the VCO chip is 8038, it is hard to procure, but it is an excellent chip.

VCO - Voltage Controlled Oscillator using Opamps

This is using opamps, hard to configure and build, but a proven design.

The VCO can also be built by a Microcontroller chip which has an analog input. Any I/O port can be the Oscillator output. This is easily possible as this system is within the 1 MHz range.