Latest threads in Hobby Electronics Basics

how does a DMM take a differential voltage measurement

I've been trying to find some info on this on google... but I just keep finding sites on DMM and how to measure voltage...

8 17yrs

panfilero

8 17yrs panfilero

Please help - Stupid question about mesh-current analysis

There must be a very simple stupid answer to this and I could really use some help knowing what it is :/ Consider a mes...

16 17yrs

zwsdotcom

16 17yrs zwsdotcom

info of 74hc4051 maximum volatge needed

Hi I want to read many analog inputs from 0....24 V . I want o use one multiplexer. I think the 74hc4051 is the most co...

11 17yrs

michaelnikolaou_remove_me_

11 17yrs michaelnikolaou_remove_me_

Resistor test question from a newbie

If I wanted to test a 1M ohm resistor to make sure it's working, would I set my digital multimeter to 20M? The next low...

18 17yrs

AGirlNamedJo

18 17yrs AGirlNamedJo

do 16-input nand gates exist?

I've been looking on digikey and on mouser and I can't find them... but does anyone know if 16input nand gates exist, an...

6 17yrs

panfilero

6 17yrs panfilero

Testing anti-static wrist strap

How would I go about testing an anti-static wrist strap to make sure it works? Someone said to use a continuity tester,...

9 17yrs

littleboyblu87

9 17yrs littleboyblu87

making a variable -5V to 5V voltage source

ok... I would like to be able to apply a voltage range of about -5V to 5V across a load, and all I want to do this by v...

1 17yrs

panfilero

1 17yrs panfilero

Turn off delay circuit

Hi, I'd like to design a circuit such that it is powered on by a short press of a switch, performs some action, and the...

14 17yrs

news

14 17yrs news

12v Wall-Wart with a Twist

See Jameco part no. 1940694. I'm looking form something like that but the ac prongs need to be twisted 90 deg. That is,...

0 17yrs

notvalid2

0 17yrs notvalid2

earphone output

I had tried to attach a new earphone to a walkman. The earphone is made in china, and its plug is not compatible with t...

6 17yrs

kvsteve

6 17yrs kvsteve

can an opamp sink current

can an opamp sink current? I'm guessing yes, since I would guess there may be some kind of totem pole thing going on at...

3 17yrs

panfilero

3 17yrs panfilero

humidity sensor

Is there a reasonable priced humidity sensor that interfaces with pic's easily? Phanderson has a board but I think at 4...

3 17yrs

clutch

3 17yrs clutch

Need help in the development and use JMCAD

Need help in the development and use JMCAD http://jmcad.sourceforge.net/ Project Information JMCAD is an program for th...

2 17yrs

YuriyMikhaylovskiy

2 17yrs YuriyMikhaylovskiy

how to interface a digital IC with an LED

Hello, I would like to hook up LEDs to a decoder and was wondering how to do this.. I basically want to use a counter w...

3 17yrs

panfilero

3 17yrs panfilero

LED voltage drop

Hi, If you connect a 9v battery across a red LED it blows. The voltage drop across an LED is fixed at about 1.4V so what...

10 17yrs

gareth.adams

10 17yrs gareth.adams

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