Hobby Electronics Basics

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Voltage followers with outputs connected

Happy New Year! What happens if I connect the outputs of four opamps configured as voltage followers? I am not sure if...
8 comments posted 19yrs
posted by mr.whatever
8 comments posted 19yrs posted by mr.whatever

need help in designing circuit

Hello, I just finished creating a circuit, it's a drum machine, but I've done the whole thing on a solderless breadboar...
12 comments posted 19yrs
posted by panfilero
12 comments posted 19yrs posted by panfilero

Printer port confusion

Is there a reason why different websites list different signal states on some parallel port pins? Are some just wrong,...
7 comments posted 19yrs
posted by randy.day
7 comments posted 19yrs posted by randy.day

blocking cap value question

Hey all: I have a TL071 on a single supply in a noninverting amp configuration, and I'm trying to figure out some value...
6 comments posted 19yrs
posted by toccata
6 comments posted 19yrs posted by toccata

anyone make a custom sound effect circuit board

Hi, I am looking to find someone who could design and make up a circuit for me for a reasonable charge. I already have...
7 comments posted 19yrs
posted by ricky.edden
7 comments posted 19yrs posted by ricky.edden

desulfating charger

Will link this post to another forum where I can't post an ascii diagram: 24v | +---, | | batt | | | 12v ) - | ) ^ ,---...
1 comments posted 19yrs
posted by kellrobinson
1 comments posted 19yrs posted by kellrobinson

Instek Oscilloscopes

How are the Instek DSOs, in particular the "portables" like GDS-2064, in comparison to comparable Tek 'scopes like the...
8 comments posted 19yrs
posted by hondgm
8 comments posted 19yrs posted by hondgm

perplixed by a multiplexer 16 to 1?

Hello, I was wondering if there is such a thing as a 16 to 1 multiplexer. I need something that can connect 16 individu...
3 comments posted 19yrs
posted by panfilero
3 comments posted 19yrs posted by panfilero

fm receiver

iwant to make a fm receiver to receive signals at 145MHz can any one help me with some ideas
15 comments posted 19yrs
posted by pabitra.nitc
15 comments posted 19yrs posted by pabitra.nitc

capacitances in parallel

Hello guys, It is seen that the capacitances in parallel add up. the equations are Q= Q1/V +Q2/ V = (Q1+Q2)/V Being Q=C...
50 comments posted 19yrs
posted by fathahrahman
50 comments posted 19yrs posted by fathahrahman

Xmitting audio

What's the easiest (cheap, few components, including a uP is OK) way to hook a microphone to a serial radio transmitter...
1 comments posted 19yrs
posted by joe
1 comments posted 19yrs posted by joe

555 astable problem

I am trying to set up a cmos 555 as an astable (oscillator). I would like it to output 1 pulse (that is, ON, or high) f...
5 comments posted 19yrs
posted by nuisancewildlife
5 comments posted 19yrs posted by nuisancewildlife

Anode and Cathode confusion?

Can any one give a good explanation that is not so confusion concerning the anode and cathode, relating to rechargable...
8 comments posted 19yrs
posted by home
8 comments posted 19yrs posted by home

kirchoffs law

hello...my name is sunil. I am currently doing my first year Electronics and communication engineering in chennai. We h...
7 comments posted 19yrs
posted by strider014
7 comments posted 19yrs posted by strider014

Measuring Current

Hi, I've come accross this component: http://www.nuhorizons.com/products/NewProducts/Nexus/Allegro/index.html Which say...
2 comments posted 19yrs
posted by mqiqcqhqaqeqlqhqiqm
2 comments posted 19yrs posted by mqiqcqhqaqeqlqhqiqm