Hobby Electronics Basics

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8051 Development Board / 89C51 / MCS51 / 8052

8051 Development Board / 89C51 / MCS51 / 8052 After searching for ages for an 8051 board I can develop stuff on I final...
0 comments posted 21yrs
posted by nospam
0 comments posted 21yrs posted by nospam

Max Charging time ?

6v 4ah sealed lead acid battery (Light) Supplied charger PSU 12v 500ma No suggestion in instructions as to max charge t...
4 comments posted 21yrs
posted by Charger
4 comments posted 21yrs posted by Charger

how should i charge this battery?

I have very little experience in electronics and only know the basic math equations and funtion of all the basic compon...
3 comments posted 21yrs
posted by ngdbud
3 comments posted 21yrs posted by ngdbud

Looking for a book

Hi, Programming Language Processors in Java: Compilers and Interpreters (Hardcover) by David Watt, Deryck Brown Does an...
0 comments posted 21yrs
posted by sho1
0 comments posted 21yrs posted by sho1

PSPICE vs Hand calculations

Hello All, I am in need of your experience in clarifying a question that is confusing me a lot. I have done my research...
0 comments posted 21yrs
posted by saranyan13
0 comments posted 21yrs posted by saranyan13

Load cable for ISP AVR

Hi, I need program ATmega8. Is ISP load cable will be enough for example: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&...
2 comments posted 21yrs
posted by geronnimo
2 comments posted 21yrs posted by geronnimo

PIC based Pt100 RTD temp sensor circuit

Can anybody give me any hints ideas or circuits to allow me to read the temperature from a Pt100 RTD probe in to a PIC m...
13 comments posted 21yrs
posted by mmcnospam
13 comments posted 21yrs posted by mmcnospam

simple voltmeter project

the circuit is more to demonstrate the principles than be accurate. I'm trying to keep it as simple as possible, and th...
2 comments posted 21yrs
posted by roy
2 comments posted 21yrs posted by roy

what to do with unused pins on MAX232/MAX233

Hi - I'm just wondering - I'm working on a board that uses a MAX233 (it's a MAX232 with internal caps). It has two RS-2...
1 comments posted 21yrs
posted by mnoone.uiuc.edu
1 comments posted 21yrs posted by mnoone.uiuc.edu

How to build a variable frequency controler?

I am looking for advice. I need a varable control device that can take standard 60 Hertz, 110 volts and give me a range...
12 comments posted 21yrs
posted by everymichael
12 comments posted 21yrs posted by everymichael

phase shifter circuit needed

I'm looking to build to a phase shifter circuit that can supply about 60 degrees of phase shift at 70 MHz (bandwidth no...
2 comments posted 21yrs
posted by transactoid
2 comments posted 21yrs posted by transactoid

Night light

I make wooden night lights and would like to install a photocell for switching on/off. I bought a photocell, wired it u...
1 comments posted 21yrs
posted by fpedersn
1 comments posted 21yrs posted by fpedersn

Change ac volt meter to a dc volt meter

I have few ac volt meter 0 to 30 volt, and i would like to buld a car battery charger, can i just use one diode series o...
3 comments posted 21yrs
posted by mowhoong
3 comments posted 21yrs posted by mowhoong

Adapter for Sanyo M1540

Does anyone know what adapter should be used for the Sanyo Cassette Recorder model M 1540? All it says on the recorder...
0 comments posted 21yrs
posted by s8jct
0 comments posted 21yrs posted by s8jct

Cigar Box

Hi, I would like to make a cigar box with an electric opening and closing lid. I would like to have a button on the out...
2 comments posted 21yrs
posted by raul
2 comments posted 21yrs posted by raul