Search found 2743 matches

by haklesup
Mon May 13, 2019 3:53 pm
Forum: General Discussion
Topic: CNC Router anyone?
Replies: 5
Views: 160

Re: CNC Router anyone?

CNC is more of a Mechanical engineering thing than Electronics but I'm sure you will find some well focused groups out there if you look. I know there are some interesting CNC controller electronics on ebay and the likes that can be used as the brains of the CNC or 3D printer (similar to CNC but add...
by haklesup
Mon May 13, 2019 3:38 pm
Forum: General Discussion
Topic: Gain block question
Replies: 1
Views: 51

Re: Gain block question

you'll never get High impedance using BJT and not good range if you are controlling the base with voltage (since it is a current controlled terminal, you need series resistance to turn that into a controllable current and it still will not be linear because a diode junction is not). I think you will...
by haklesup
Mon May 13, 2019 3:23 pm
Forum: General Discussion
Topic: [18650] rechargeable battery + super capacitor
Replies: 7
Views: 137

Re: [18650] rechargeable battery + super capacitor

Those Vishay super caps look like a good match but read the datasheet carefully, the only spec that might get in your way is the DC ESR which is as high as 70 ohms for some models. This will limit the discharge current you can effectively use by lowering the effective voltage (if I understand that c...
by haklesup
Mon May 13, 2019 3:01 pm
Forum: General Discussion
Topic: jack Question
Replies: 3
Views: 134

Re: jack Question

This is the only one I found. https://www.digikey.com/products/en/connectors-interconnects/barrel-audio-connectors/434?k=&pkeyword=&sv=0&pv272=74&sf=0&FV=ffec10de&quantity=&ColumnSort=0&page=1&pageSize=25 I assume 3 are for the audio and also 2 N.C switches. The one above looks like maybe 1 N.O SPST...
by haklesup
Fri May 10, 2019 10:40 am
Forum: General Discussion
Topic: [18650] rechargeable battery + super capacitor
Replies: 7
Views: 137

Re: [18650] rechargeable battery + super capacitor

I don't think you can fit a capacitor big enough in your pocket. Assuming you don't want to engineer a sleep mode or its not paratactical, then a secondary external battery hookup so you can temporarily power it externally while you swap the internal battery seems like the simplest approach. If you ...
by haklesup
Tue May 07, 2019 4:18 pm
Forum: General Discussion
Topic: TV lacking remote control...
Replies: 13
Views: 977

Re: TV lacking remote control...

if it was not Bluetooth, then what wireless protocol is capable of automatically trying to connect to new audio devices? I've never seem WiFi used for that application directly (audio direct connection) . Was it for LG speakers? I gave away my older LCD LG TV when the smart TVs came out and I switch...
by haklesup
Tue May 07, 2019 4:11 pm
Forum: General Discussion
Topic: Need help identifying a semiconductor
Replies: 23
Views: 4723

Re: Need help identifying a semiconductor

Signetics has changed quite a bit, they are no longer a chip maker and their website shows that they now mainly focus on IC chip packaging technologies (they must own some patents). Some of their products went to other companies but I forget who, most are deeply obsolete, Do you have a part number y...
by haklesup
Mon May 06, 2019 12:54 pm
Forum: General Discussion
Topic: TV lacking remote control...
Replies: 13
Views: 977

Re: TV lacking remote control...

you can probably turn off Bluetooth somewhere in the TV settings so it won't connect to audio devices, was this a particular LG model?
by haklesup
Mon May 06, 2019 12:51 pm
Forum: General Discussion
Topic: Structures
Replies: 3
Views: 138

Re: Structures

Well the question is without context or detail. A recursive function is one that uses the result from one solution as the input to the next calculation and solution. Assuming this is programming code based question (and not a paper calc) The function should have a counter to define the number of rec...
by haklesup
Mon Apr 29, 2019 12:54 pm
Forum: General Discussion
Topic: Technology Backfire?
Replies: 35
Views: 1448

Re: Technology Backfire?

That's the Jeep Compass that you charge by driving North, :)

Glad to hear it is behaving now.
by haklesup
Mon Apr 29, 2019 12:50 pm
Forum: General Discussion
Topic: Bud Metal Question!
Replies: 5
Views: 173

Re: Bud Metal Question!

An automotive paint shop can probably match the color and finish but is it worth the cost. A different but coordinating color for the back panel may be acceptable. From the photo it looks like it could be a powder coat or epoxy paint of some kind making it hard to match with spray paint. If you need...
by haklesup
Thu Apr 25, 2019 5:52 pm
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 88
Views: 6020

Re: Odd Commercial Products.........

Probably everything at Spencer Gifts belongs in this category (at least the old Mall store iteration did)
by haklesup
Mon Apr 15, 2019 3:05 pm
Forum: General Discussion
Topic: What kind of dye is this?
Replies: 5
Views: 371

Re: What kind of dye is this?

probably the same dye used in crayons and candles of it is a real Wax. What the dye is, depends on the color. If you are using a polymer wax, its probably a little different https://www.crayola.com/faq/science/can-you-provide-information-about-crayons-for-a-science-fair-project/ https://makezine.com...
by haklesup
Thu Apr 11, 2019 11:25 am
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 88
Views: 6020

Re: Odd Commercial Products.........

Peltier would only cause you to need to remove more heat and need to generate more power. They are horribly inefficient generating ~ 4x to 6x more heat on the hot side than they remove on the cool side due to the high current they require to operate. If you really need to get something below ambient...
by haklesup
Tue Apr 09, 2019 12:40 pm
Forum: General Discussion
Topic: Odd Commercial Products.........
Replies: 88
Views: 6020

Re: Odd Commercial Products.........

you're a day late for an April fools joke on the DVD rewinder :) The gas flashlight might be a thing for the super bright flashlight hacking crowd, looks like it has a fair share of yellow electrical tape on it. Just need some water cooling for the LEDs and you're are on the way to hella lumens http...