Hobby Electronics Basics

  1. Home
  2. Hobby Electronics Basics
9371 Threads Posts
to

Roof co-ax amp supply question

Hi All, I want to test out an in-line aerial amp and have supplied it with 12V battery and circuit for testing as below...
2 comments posted 6yrs
posted by charlie
2 comments posted 6yrs posted by charlie

Ads On the Circuit Board

OK, you take something apart 'cause it's broke and you already suspect it was _designed_ to break. Yer suspicions get c...
1 comments posted 6yrs
posted by bretcahill
1 comments posted 6yrs posted by bretcahill

Servo motor recommendation sought

For my plotter project I have experimented with a variety of different servo motors. Very cheap analog micro servos wor...
2 comments posted 6yrs
posted by real-not-anti-spam-address
2 comments posted 6yrs posted by real-not-anti-spam-address

Misusing a transformer

Just a sanity check if you don't mind. I have a 230v to 30v 1amp 50Hz transformer - is there anything wrong with pluggin...
5 comments posted 6yrs
posted by eathDELETEer
5 comments posted 6yrs posted by eathDELETEer

Diode test and identify

trying to fix AC/DC power plug. I have a Diode that says: GW327 SR560 I THINK this is a Schottkty Diode. Setting meter...
7 comments posted 6yrs
posted by stevwolf58
7 comments posted 6yrs posted by stevwolf58

motor wiring / Keeps starting and stopping

I have motor that was removed from my furnace when a new furnace was installed. I know the motor is good as I replaced...
4 comments posted 6yrs
posted by stevwolf58
4 comments posted 6yrs posted by stevwolf58

wireless sensors

I bought a wireless inside/outside temperature/humidity display. I got to thinking about the outside sensor. I am almos...
5 comments posted 6yrs
posted by rmowery28146
5 comments posted 6yrs posted by rmowery28146

Wanted: A 'joule thief' style circuit design...

... that I can use to drain alkaline cells and push the 'charge' into either a lithium-Ion cell (for a flashlight), a p...
15 comments posted 6yrs
posted by shaun.at.pukekohe
15 comments posted 6yrs posted by shaun.at.pukekohe

Colpitts oscillator

Hi, I'm following instructions here (https://www.wikiwand.com/en/Colpitts_oscillator#/Practical_example) to build a dis...
5 comments posted 6yrs
posted by riccardomanfrin
5 comments posted 6yrs posted by riccardomanfrin

Calculate run time of battery to a specified voltage

I want to calculate approx run time of a D cell with a capacity of 13,000 Mah. I assume that Time(H) = Capacity(Ah)/Cur...
11 comments posted 6yrs
posted by scientist77017
11 comments posted 6yrs posted by scientist77017

LED RF Noise Evaluation

Hello, I have experienced what seems to be RF Noise that is generated from LED lighting. I don't have the exact spec's...
8 comments posted 6yrs
posted by somewhere
8 comments posted 6yrs posted by somewhere

Independence of Capacitance from Dielectric

Hi, A simple carelessness has caused the famous formula for the electrostatic p otential to be written wrongly while in...
2 comments posted 6yrs
posted by hvansari
2 comments posted 6yrs posted by hvansari