Hobby Electronics Basics

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pic16f84a simulator help

Hi, one of my students is off to Cancoon for his christmas holidays, the lucky beggar. He's going to miss some school b...
4 comments posted 18yrs
posted by rgdavidson
4 comments posted 18yrs posted by rgdavidson

schottky tempco

Is it 2.2 mV/C?
13 comments posted 18yrs
posted by nospam
13 comments posted 18yrs posted by nospam

any tricks to retrieve a NEC 23256 ROM data ?

this is a read-only maskable 32K words x 8bit ROM (compatible with 27cxxx ROMs) This ROM chip was subjected to momentar...
11 comments posted 18yrs
posted by some
11 comments posted 18yrs posted by some

Crystal Radio Tuning Capacitor

I'm planning to build a crystal radio similar to the one linked to at the bottom of this post, but the specs call for a...
15 comments posted 18yrs
posted by the1930s
15 comments posted 18yrs posted by the1930s

Hockey puck SCRs

I recently bought a hockey-puck SCR, without realising it needs to be clamped to a heatsink. I'm trying to decide wheth...
2 comments posted 18yrs
posted by n8023299
2 comments posted 18yrs posted by n8023299

inductive or resistive load

Hi, all. This is my first post in this group. I'm trying to make a board for controlling AC loads. I mean to be able of...
5 comments posted 18yrs
posted by ceporrock
5 comments posted 18yrs posted by ceporrock

Looking for a photodiode with large surface area

Hi, Does anyone know where I can get a photodiode with a relatively large surface area? Ideally something like this: ht...
2 comments posted 18yrs
posted by styleappointments
2 comments posted 18yrs posted by styleappointments

Simple On/Off timed circuit

I am trying to build a circuit that is able to turn a relay on and off at specified times. I have been working with a 5...
4 comments posted 18yrs
posted by jacob.northington
4 comments posted 18yrs posted by jacob.northington

Current Regulator

I have a motor home which has the main battery for the engine and an auxiliary battery to supply the lighting etc in th...
9 comments posted 18yrs
posted by xxx
9 comments posted 18yrs posted by xxx

Does Mixing Stereo to Mono Require Resistors?

I have a Philips DVP 642 DVD player connected to a TV set that has only mono sound, and only one audio input jack. I wa...
11 comments posted 18yrs
posted by none
11 comments posted 18yrs posted by none

generate a schematic for pcb ?

is there a way to generate a schematic by just listing the components and there connections instead of drawing it out i...
19 comments posted 18yrs
posted by some
19 comments posted 18yrs posted by some

six pulse bridge rectifier

Hello, I am having problems measuring the voltage of a 600 kW six pulse bridge rectifier with a simple multimeter .......
2 comments posted 18yrs
posted by rex7us
2 comments posted 18yrs posted by rex7us