Digital Counter - 4029 and 4511

I just about the circuit you made. what kind of IC is 4029N & 4511N? Is it a diver/decoder? I tried to research on the datasheet but it cannot give exact specification...

Mail from JT from Philippines

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4029 is a Preset Dec-hex, up-dn, Counter - and 4511 is a 7-Segment Display decoder. Learn more see ....

• The 4029 CMOS Counter IC
• The Seven-Segment LED Driver
• Decimal Counter Plus Display
• Counting Circuits - Electronics Club

Word doc and exe attachments i don't open. send a jpeg photo or rtf or pdf or prepare your doc online Google Docs. please also tell me which page or circuit is this question about. any other doubts feel free to ask. Is it this ... Simple Digital Counter - doc00021

delabs

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yes, .thanx for the links..i'll try to go over with the theory..so where can we purchase those items if ever we need it?

Reply from JT

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It depends on which country you are in see this page Components Materials

delabs

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Halogen bulb lamp dimmer circuit

Can someone provide me a (simple) schematic for a dimmer that would control 12 VAC about 80 watts. This would be used to control a lamp with halogen bulbs.

Anonymous in Hobby Hound

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Here is a listing study them and choose, try out, learn and then build the one right for you.

• Light dimmer circuits
• 1200 Watt Lamp Dimmer Circuit
• discovercircuits.com - Light Dimmer
• Application Notes for Thyristors
• Poor Man's Lamp Dimmer Project
• PWM Motor Speed Controller / DC Light Dimmer
• Lantern Dimmer/Flasher
• Halogen light dimmer provides infinite control

delabs

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Bioamp for muscle signals - EMG

message: I'm working an a bioamp for muscle signals. This is the base design, but it does not work. Basically what I want to do is a circuit that amplifies my muscle signals and is able to run a small dc motor when I flex a muscle. Any help? Thanks

Mail from JX US

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Study these links and send me a feedback ....

• Positive Feedback Circuit for Isometric Muscle Experiments
• Raw EMG into a signal resembling the muscle force
• EMG design parameters
• The Measurement, Instrumentation, and Sensors Handbook

delabs

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SCADA System - Project Idea

Hello Sir, I am a student of Electronics and Instrumentation Branch from BP. I am doing my training at ..... where i have been assigned a project to implement SCADA System using Microcontroller.

Right now,i have a good knowledge of PSOC and AVR microcontrollers but since i am new to this technology,i am not getting how i should proceed for the project.i would be greatful to you if you can provide some information about the previous projects students have done in you organization regarding scada implementation.

Mail from MG India

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A "SCADA System" may consist of a Human using a Computer with Special Software Overseeing a Process Control System made of many sensors, transmitters, autonomous controllers and actuators made of motor drives and heaters.

Some of these elements may send data to the computer which may Analyze and Indicate the condition of process or progress. The Human Operator can then fine tune the parameters of his system or study and record process cycles for quality and yield.

You discuss this with your mentor and then build a part of it, or implement a part of it in an existing system. A whole SCADA system is too big a project, but a simulated or demo software interface project can be made.

Try seaching at Google Scholar also study links below.

• SCADA & Automation Project Management
• VISUAL, a free SCADA/HMI project
• Free SCADA project
• Supervisory Control And Data Acquisition
• GE Fanuc supervisory HMI and SCADA

This will be posted to Elex Quna, comment on that post to continue. Any other doubt post as a comment, I will Answer it.

delabs

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Using LEDs with Battery Power

What are LEDs ? How can we use them for Long Battery Life

Mail from AD

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If LED flashes at 5-10 K Hz at even 50% Duty Cycle. It may save some power and improve life. So it is just an idea, it may not solve the problem. The idea was to improve battery life and give uniform light for annunciators. It may not be good for flashlights.

• Light-emitting diode - Wikipedia
• The LED Museum
• Light Emitting Diodes (LEDs)
• What is Inside an LED?

delabs

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