Hobby Electronics Basics

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How to bias a MOSFET amp?

I'm trying to improve my limited understanding of how RF amps operate. I've been studying "Solid State Design for the R...
69 comments posted 22yrs
posted by meara.london
69 comments posted 22yrs posted by meara.london

Power Supply for Model Trains?

I am thinking about making my own controller for model trains (single track to start with.). Anyone know of a good basi...
0 comments posted 22yrs
posted by nospam
0 comments posted 22yrs posted by nospam

Need help building a split voltage supply

Can someone help me design a simple dual voltage power supply. I have some IC's that require 5V and others that require...
13 comments posted 22yrs
posted by N
13 comments posted 22yrs posted by N

12v battery protector circuit

I'm looking for a circuit that will protect a lead acid battery against excessive discharge - i.e. cut off the supply t...
24 comments posted 22yrs
posted by news4
24 comments posted 22yrs posted by news4

25 Volt LED?

I was curious if anyone knew of a vendor who makes/sells high voltage LEDs. I have a 25 volt power supply, and for vari...
16 comments posted 22yrs
posted by hbonwit04
16 comments posted 22yrs posted by hbonwit04

stepdown dc/dc power

Hello all Just have a techniacl question. Over the passed 2 days I'm trying to think of a way to build a power suppyly...
5 comments posted 22yrs
posted by peter_chans
5 comments posted 22yrs posted by peter_chans

binaries?

very interesting group, but how can u teach novices and explain circuits without drawings?
10 comments posted 22yrs
posted by mike.craig56
10 comments posted 22yrs posted by mike.craig56

High Efficiency LEDs?

My apologies if the following question is a dumb one, but could someone please explain to me if there is any difference...
0 comments posted 22yrs
posted by Doors_of_Perception
0 comments posted 22yrs posted by Doors_of_Perception

simple 2 port usb hub

I am trying to find a schematic for a very basic 2 port usb hub to extend on port into two for a small project i'm work...
6 comments posted 22yrs
posted by james
6 comments posted 22yrs posted by james

size of 4/3A-cells?

Hello, just got a supply of Sanyo 4/3A-cells to replace those in the battery pack of my lap top. However, after solderi...
0 comments posted 22yrs
posted by engelbert_buxbaum
0 comments posted 22yrs posted by engelbert_buxbaum

Power switch kuh - thump !!!

I have a guitar preamp ( Marshall JMP-1 ) . When it powers up , there is very loud Kuh - thump on the output . How do I...
2 comments posted 22yrs
posted by sorry.no
2 comments posted 22yrs posted by sorry.no

Automotive LED Light Modules

I have a working idea for making some LED Modules that I want to use in my SUV for Car Shows. I want to use a 12 volt p...
3 comments posted 22yrs
posted by fieldska
3 comments posted 22yrs posted by fieldska

Info on MOSFET Inverter's response time

I'd like to find some info on MOSFET inverter's response time (rising edge and falling edge and driven by current sourc...
1 comments posted 22yrs
posted by jl
1 comments posted 22yrs posted by jl

changing DC voltage

I want to regulate a peltier cooler. Manufacturer says they don't like to be switched on and off alot, they prefer chan...
3 comments posted 22yrs
posted by fritzo_two_
3 comments posted 22yrs posted by fritzo_two_