Hobby Electronics Basics

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quick 4049 data sheet question

Hey all; I'm driving a 2222 transistor with the 5v output high from a 4049 inverter. I'm not sure which figure to refer...
2 comments posted 19yrs
posted by toccata
2 comments posted 19yrs posted by toccata

wireless receiver

Hi, I received this TWS-434A/RWS-434 8-Bit RF Combo Package and been playing with it. I am sending and receiving using...
13 comments posted 19yrs
posted by lerameur
13 comments posted 19yrs posted by lerameur

please recommend AM radio soldering kit

Hi All, could anybody recommend am radio soldering kit for 15 y. old ? It shouldn't be a primitive one which I see every...
2 comments posted 19yrs
posted by noemail12000
2 comments posted 19yrs posted by noemail12000

home made power supply

Hello, I built this circuit a little while ago and never got a chance to test it: http://www.uoguelph.ca/~antoon/circ/v...
8 comments posted 19yrs
posted by lerameur
8 comments posted 19yrs posted by lerameur

help needed abt bi colur led

i need information abt bi colour leds.pls direct me to the site which can give me the constructional details abt bi colu...
9 comments posted 19yrs
posted by nitinmulley
9 comments posted 19yrs posted by nitinmulley

Newbie RS-232 question

I've got a couple of female-female RS-232 cables. I initially thought they were null-modem cables, but when I checked t...
2 comments posted 19yrs
posted by repownall
2 comments posted 19yrs posted by repownall

RF stage question

Hi I want to build an AM radio receiver by myself. My question is: what is the right amplification that the first RF amp...
10 comments posted 19yrs
posted by wavesoft
10 comments posted 19yrs posted by wavesoft

USB to PCMCIA Bridge Chip (Component)

Hello~ I am expected to develop the mobile equipment as a PCMCIA Type and will use a core processor like a SoC(System o...
2 comments posted 19yrs
posted by jjayzzang
2 comments posted 19yrs posted by jjayzzang

can someone help with RC timing circuits?

Hey all; I understand RC timing circuits and how they work (well, mostly anyway), but have a couple questions. If I wan...
6 comments posted 19yrs
posted by toccata
6 comments posted 19yrs posted by toccata

PWM A Dc Motor W/Seperate Supply

Hi, I'm using a pic a npn resistor and diode to drive a small dc motor, everything works fine if i feed the motor the s...
8 comments posted 19yrs
posted by none
8 comments posted 19yrs posted by none

220 volts Versus 120 volts

1. Hi guys! i noticed that every countries have their different voltages supply..in my country we used 220volts other c...
10 comments posted 19yrs
posted by donskister
10 comments posted 19yrs posted by donskister