Hobby Electronics Basics

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CMOS switch - DC blocking cap necessary?

Hey all; I'm thinking of using a switch like this one http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2054/t/al, which ha...
3 comments posted 17yrs
posted by toccata
3 comments posted 17yrs posted by toccata

Help on RF amp please

Hi, I have been working on an RFID project that uses a power booster from a Melexis cookbook. http://www.melexis.com/As...
2 comments posted 17yrs
posted by nobody
2 comments posted 17yrs posted by nobody

Using a Transformer on 220 v Appliance

I've got a girlfriend in the Philippines who wants this fancy Kitchenaid Mixer that cost a fortune. They hae 220 over t...
10 comments posted 17yrs
posted by clannorm
10 comments posted 17yrs posted by clannorm

Measuring variation in inductance

I was wondering what precautions I should take for measuring a coil's inductance. Following some capacitive sensing app...
3 comments posted 17yrs
posted by grubertm
3 comments posted 17yrs posted by grubertm

How to make a remote control detonator

I need to make a remote control detonator . Anybody could give me schematics that work?
10 comments posted 17yrs
posted by arturo.magidin
10 comments posted 17yrs posted by arturo.magidin

RTD temperature equations

Morning I am looking for equations that solve for temperature in terms of RTD resistance. I find lots of references to...
6 comments posted 17yrs
posted by j.hall
6 comments posted 17yrs posted by j.hall

boiling off electrons

I don't know much about vacuum tubes, but often I have read statements like "the cathode heats up, causing electrons to...
27 comments posted 17yrs
posted by r_delaney2001
27 comments posted 17yrs posted by r_delaney2001

Traffic Light Spoofer for Cyclists

I pull up in the left hand turn lane and the traffic light doesn't respond. If only I had a 9 volt battery powered spoo...
31 comments posted 17yrs
posted by BretCahill
31 comments posted 17yrs posted by BretCahill

conductive rubber switch question

Hey all; I'm designing a switching system using a uC and am thinking about using some of those little conductive rubber...
4 comments posted 17yrs
posted by toccata
4 comments posted 17yrs posted by toccata

PCB layout of BCD clock

hi i build a bcd clock shown in the page http://ourworld.compuserve.com/homepages/Bill_Bowden/clock.htm and all the cir...
5 comments posted 17yrs
posted by josegidayfin
5 comments posted 17yrs posted by josegidayfin

Mercury

Are mercury thermometers more accurate than blue wax or red alcohol thermometers?
12 comments posted 17yrs
posted by boobooililililil
12 comments posted 17yrs posted by boobooililililil

Steady DC power for LEDs

Hello! I have installed various configurations of LEDs in our sailboat as indicators and light sources (single LEDs, mu...
11 comments posted 17yrs
posted by nancydow26
11 comments posted 17yrs posted by nancydow26