Hobby Electronics Basics

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Ultrasonic mixer

Greetings to All: There are RF mixers such as the SBL-1 which works well in the MHz range. I am interested in mixing 25...
18 comments posted 15yrs
posted by fredander503
18 comments posted 15yrs posted by fredander503

Common emitter as level switcher

First, I'm a transistor idiot. I wanted to change a 5V 1 MHz clock signal to 12V. I put this together, +12V--10kohm----...
26 comments posted 15yrs
posted by gherold
26 comments posted 15yrs posted by gherold

bandpass filter

Hello, I have been on the lookout for a high pass or bandpass filter chip. I know there are a lot of low pass filter. b...
3 comments posted 15yrs
posted by lerameur
3 comments posted 15yrs posted by lerameur

LEDs of different brightness ratings

I often see LED types categorized according to their brightness ratings. Are the ultra-bright and super-bright types al...
4 comments posted 15yrs
posted by Dishum
4 comments posted 15yrs posted by Dishum

Circuit Boards PCB

American circuit technology is the leading manufacturer of various types of circuit boards which are the veins & arteri...
6 comments posted 15yrs
posted by act.pcb6
6 comments posted 15yrs posted by act.pcb6

4017A function generator -Finding resistance values

Hello, My 4017A function generator just died on me today. I opened it up and saw two badly burnt resistors. I would lik...
12 comments posted 15yrs
posted by gaudet.brigitte
12 comments posted 15yrs posted by gaudet.brigitte

555 monostable basics

If another trigger pulse comes along to a 555 wired as a monostable, *while it is already triggered by the first pulse,...
18 comments posted 15yrs
posted by mike
18 comments posted 15yrs posted by mike

DDR termination voltage

I read on termination topics and they say that having Vtt equal to the high-to-low transition level is a bad idea (tris...
27 comments posted 15yrs
posted by do
27 comments posted 15yrs posted by do

Ferite core?

Just purchased a 12 volt adapter for my CPAP breathing machine. It consist= of a cigarette lighter male plug on one end...
7 comments posted 15yrs
posted by ivanvegvary
7 comments posted 15yrs posted by ivanvegvary

Electronic practical softwares

We want to discuss the software which is useful for electronic engineers . I think we will talk about the Pro E or Matl...
0 comments posted 15yrs
posted by rose.gulfyahoo.com
0 comments posted 15yrs posted by rose.gulfyahoo.com

Inverter H bridge question

Could some electronics guru please help ? I was running a SPICE simulation of an H bridge for an inverter, with 12 V DC...
12 comments posted 15yrs
posted by dakupoto
12 comments posted 15yrs posted by dakupoto

Driving RGB LEDs with an Arduino

The next project I have in my head is to make a small gizmo with a big RGB LED which responds to sound. It has to be ba...
35 comments posted 15yrs
posted by openglMYSOCKS
35 comments posted 15yrs posted by openglMYSOCKS

Villard circuit and transformer question

Could some electronics guru provide some insight into the following ? One can use a Villard multiplier to step-up volta...
8 comments posted 15yrs
posted by dakupoto
8 comments posted 15yrs posted by dakupoto