Electronics

This video demonstrates the ease of set-up and use for the AdaptivEnergy Energy Harvesting 60Hz Demonstration Kit. This product is ideal for for battery extension or replacement in wireless machinery condition monitoring, sensing, and other low power applications where vibration or impact events are present.

This compact energy harvester from AdaptivEnergy contains highly efficient proprietary circuitry, energy collection and storage electronics, and a 2-wire interface all within in a 2.22″ (56.5mm) x 1.38″ (35.0mm) x 0.65″ (16.5mm) package. This product is also available in 50 Hz, 60 Hz, and 120 Hz with the same form factor.

Visit Mouser.com for more details.

Duration : 0:6:11

(more…)

This is probably the first video of a midibox MB-6582 project that contains 8 commodore 64 SID synthesis chips. Visit http://www.midibox.org/ for more information on open source, community built synthesizers, sequencers, and other midi projects.

This project is in PacTec PT-10 case:
http://www.mouser.com/ProductDetail/PacTec/82404-510-000-PT-10-BLACK-Kit/?qs=sGAEpiMZZMsrGrAVj6eTvYgIKUbTbQH680bkYJF1xr4%3d

Duration : 0:7:22

(more…)

I’m almost ready to conclude my DIY kit experiment. Once I get the ATmega168 chips from mouser, I’ll have some to spread amongst electronics aficionados.

Duration : 0:6:5

(more…)

Dave demonstrates how much fussing around can be involved in selecting just a couple of cost optimised parts for a new design, using Digikey, Mouser, FindChips, Octopart and Atmel websites.

Duration : 0:32:12

(more…)

38 channels, 18,500 lights… Last years show…. Weak video and sound, sorry…. Expanded to 52 channels this year, with dimming… Will get better audio than a camera stuck out the moonroof… Did not get time to edit properly…… No Light-O-Rama or prefab controllers here… 100% Home built from the ground up……. Big thanks to everybody at the DIY Christmas WIKI at ChristmasInShirley, DoItYourself Christmas Forums, Mouser Electronics, VixenLights.com, and PCB Express!!! I’ll die from the solder flux fumes, but its all worth it!!!!

Duration : 0:7:3

(more…)

Electronics engineer designs the perfect Ticket deterent

Duration : 0:1:41

(more…)

I am trying to build a phone ringer circuit based on this web page:

http://www.techlib.com/electronics/telephone.html

It is the second project. In this project is a 9V to 120V Power Transformer. I am having trouble finding this. I am buying most of the parts from www.mouser.com so if it can be found there, great, but anywhere works.

Also, I am wondering how to pick some of the other parts. The capacitors, for instance, have a rating in the diagram like .033uf, but when I go to buy capacitors there is a lot more information needed. How do I figure out what part I need? Same with Resistors, all it has is 22Meg or 220ohm but not any of the other information. Any help would be appreciated.

Finally, I need to buy some sort of board to build this circuitry on. Any recommendations as to what to do use?

Thanks in advance.
I have one of these that was build by the guy who designed the circuit, and I have taken it apart. The transformer in the unit has the following info on it, does this help:

702 2 5 6
ALE PL 12-01a (or oia, o1a, 0ia)
3 4

It is a bog-standard power transformer. Unfortunately they don’t specify what VA rating to use so it’s a bit hit and miss. I think this Mouser part might work: 673-030-7329-0 but you might consider going on ebay and looking for a few cheap ones of different sizes.

Ratings for capacitors will be voltage and tolerance. Tolerance doesn’t matter too much in that circuit, so you can ignore that. None of the capacitors has more than 12V on it, so choose a voltage rating of 12V or higher. Electrolytic caps (the ones with the + terminal) come in 16V and 25V versions.
Resistors also have a tolerance, usually 5% or 1%. Again, it’s not critical in that circuit. They also have a power rating. Standard resistors are 0.25 watt carbon film or 0.6 watt metal film. Either type will do, except for the 2x 10 ohm resistors which should be at least 0.6 watt rated I think.
For board, I’d go for stripboard, aka. matrix board. Like this (can’t find it in Mouser)

http://www.maplin.co.uk/Module.aspx?ModuleNo=47480

You will probably have to cut the tracks in places. There is a special tool called a stripboard cutter, but you can also use a small drill bit.

"does this help"

No

If you can tell us the size of it, it might.

Video shows slowly evolving basic SEC 15 exciter. Demonstrates single wire high voltage with neon bulb. The coils were switched out and replaced by some acquired from Mouser Electronics. They seem better. I also coarse-tuned Lb by changing from 10 uH to 4.7 uH. Power draw went down 40% and output increased. Video shows board problem solved with aluminum back plane.

Duration : 0:2:23

(more…)

I’m trying to build the sawtooth wave generator in the circuit below (Forrest Mimms III), which calls for this transistor or similar. I’m too new in electronics to know what is similar. The alternatives I’ve seen on the web seem to be equally elusive. Jameco, Newark, Mouser, and Radio Shack don’t have it.

Does anyone know of another simple ramp generator that excludes this part?

http://www.wiparat.com/ramp-generator-by-2n4891/

Thanks, Jim. I may go with that 555 example after all. I’ve been working with 555s and 556s so they are familiar turf.

Unijunction transistors like 2N4891 are cool, but rare. One unijunction transistor is enough to create an oscillator (in your circuit, Q2 is just a buffer; it’s not technically needed)

*Any* unijunction transistor would work, if you can get your hands on one. If you can’t, try this ramp oscillator based on the popular 555 timing chip. You’ll DEFINITELY find one at Radio Shack:

http://www.electronic-circuits-diagrams.com/oscillatorsimages/oscillatorsckt2.shtml

Or, try this classic feedback ramp oscillator using op-amps. Again, just about any bipolar op-amp will do (and guaranteed to be at RadioShack)

http://www.elecfree.com/electronic/sawtooth-wave-oscillator-by-tl082/

Duration : 0:2:57

(more…)