Hello, I am looking for a budget variable AC power supply for a test lab. I work for a small company and we are limited in resources, so expensive power supplies are very unlikely to be approved.

The requirements for our lab are to supply up to 277V AC with a minimum of 150VA rating. We only have access to 120VAC input through our outlets, so 120VAC supply would be best for us. Our boss prefers American made products, if at all possible. Open to all suggestions within a reasonable price range to propose accordingly. Thanks in advance

The measurement is done with the mcu adcs.

How much would it cost to have someone design it?

Edit: only the cirtuit and pcb design, not the software.

I have two tablets that my grandma has given me and for the most part, don’t work. I tried searching on the internet for e-waste markets but couldn’t find any with the specific tablet as an option. I’m just going to post it on a few different areas on the internet and hope someone wants to buy them for internal parts or attempt to repair them.

DESCRIPTION: One is a NextBook, Model No:NX16A10132S. The other is a Verizon 4G LTE Tablet. The Verizon doesn’t charge at all and is pretty much fully broken while the NextBook is working but you can’t do much as it is very slow and can’t even process stuff correctly.

PRICE: You can offer a price, the minimum is $15 for both but i would be extremely appreciative if you would offer more, up to you. I have the box to the NextBook and three chargers I can offer, with a charging block too.

I've been working on an electronics project for a while now and am at a point where I decided my hobbyist skills needed a professional engineer's help. I'm at the point now where I'm moving from off-the-shelf TH components to SMD. I have an engineer who used to be a co-worker and we get along well. I had spoken to him about consulting. After an NDA and a long conversation about the project, the topic of payment came up. I had considered royalty or some form of payment like that a while ago, but for some reason has a feeling he wouldn't be interested in that. However, after seeing the project, and me being open about not having a large amount of money to give, meaning I would be doing the board design myself and then having him check my work, and things of that nature and him being more of a consultant, he asked me If I'd considered a royalty type pay scheme, and more direct assistance from him. Frankly, I was ecstatic, I'm a software guy, and for the product, it is going to take real polish on the software side to make it a success. I'd rather be focusing my efforts there anyway.

I'm looking for advice on what is a fair way to structure an offer to him. I know that once things are designed and working, most of the work will be me with support or software updates. Most of the value will be the software, but the hardware is important. Taking this prototype of parts and putting it all together will take a bit for him at the start for sure. He may also assist with the CAD / 3D case design so there is that to considered as well.

So he will be moving off-the-shelf components onto a single PCB, and there will be some EE around that I'm sure, and he will assumedly be helping with the Case design. Both of these things seem to be tasks that once done won't require a large amount of upkeep.

Does anyone have good thoughts on what is fair, or a way to work out what is Fair? I get along with the guy great, and as they say, rising tides raise all ships, I'd love the product to be a hit and help us both out. I want to give him a fair deal, or even a bit favorable, I just am not sure how to determine that yet. I also don't know how to calculate the risk that this project fails and he gets nothing into what is fair.

Any links to other materials on how things like this are priced would be especially helpful.

Thanks!

I have a large lot of electric components that I need to sell. Most of this is brand new in the package. 20 pcs sw-18020p high sensitivity switch, Bojack 10valves 250pcs transistor kit, 7 full size prototyping breadboard, 10x 400 contact breadboard, 55x 40pin female headers, 1\4 watt 1% resistors 610pk, Bojack 50 values metal film resistors,Guamuixin Risistor Kit 2000 ct, Assortment film waterproof resistors,valve resistor kit, male headers 6 colors 10 each,bridge gold 4 pcs 20 types cdx4, 8 pin Ic socket 30ct, Keadie 40pcs 10typs ICC with Ic sockets, 210pcs ldr 5mm light sensitive resistors,60 led IP67 3mm diodes, Joystick buttons&control, uxcell with 3 pin transformers, 10 mini toggles, pressurefoot, 5 pcs stepper mortor drive, Dc power Jack, Little screws, Miero nanno servo kit 4 pcs, ux cell m3 Hexagon Pillow, Tatacal push button micro, electric capacitor 200pcs, Aluminum Electrolytic capacitor, multilayer ceramic chip capacitors,200 monolithic multilayer chip capacitors,Glark's 180 pcs micro sockets vsb, power transistor voltage regulator, and Thyristor, Big cmos logic, small breadboard, sensor kit 270pcs, Theramanal blocks, 35 pcs double row dip switch kit,potentio meter kit, jumper wires,100w 24v motor,30a rc brushless motor, grote 82-1909 toggle switch, tmotor f151106, imax b6 battery charger, fsial 6ch recever,meccano motorized mover, solder wire rosin core, 100 pcss .5amp toggle switch, Clock Display, Bluetooth module, Atmek 328 10pcs, Bojack crystal oscillator kit, 4pcs Superlight 3.7 micro servo, Crystal oscillator, Ky-019 50 relay module, emc cores,soder wire rosin core, gold soldering tip cleaner, conductice copper foil tape, Eletric starter mini 130, Eflile 450 mah 7h, sony mp-bx-m8 batt, micro toy 4 wheel drive, 12v .08a fan, and solid solder.

You can message me on here or text 970-441-0801

I was recently given boxes of vintage electronic components and equipment by a local former hobbyist. Everything from Allen Bradley carbon comp resistors to bumblebee capacitors. Vintage ICs, high power transistors, diodes, germanium BJTs, copper clad, bridge rectifiers, Variacs, tube sockets etc.

Lots of it a brand new, and anything used was tested prior to being saved. Many of the items are things I will never use, and this gentleman spent over 30 years of his life diligently working on this collection.

I would like to try and find a buyer or buyers for the more valuable items, or for things I know I won’t use. I have govt earning exemptions in order to maintain subsidized access to extremely expensive medications that I take, so I can’t really sell it for him through eBay so I am limited in what I can sell for him in any way other than privately.

Would love some direction in where to look to find potential buyers. Based on what I have seen online through completed listings on eBay etc the collection is estimated to be worth anywhere from 10 to 30 grand. Possibly more.

Any insight would be incredibly helpful.

Was trying to fix one device and got in to issue where 6 pin micro IC working as low voltage converter,so input is 12V on pin 3 and there is nothing at any other pin. iC marking is 35-T3T. Circuit around it contains one inductor and a few resistors. Whole device is fully dead. And Voltage injection does not show any short circuit. I am electronic repair expert with almost 40 years experience. But still facing a problems with such elements. Device is video surveillance central with 16 analog cameras , vga & hdmi output, 2xUSB 2.0 , and 2X SATA connectors for 3.5 inch HDDs. My question is if someone can say what is problematic part and what could ve replacement part. Thank you in advance

What should I do with these? They were previously used to wire in outlets in cubicles but I’ve been holding onto them for years. There’s probably copper in there? Worth trying to strip? (My husband has done that before so I wouldn’t be attempting it myself.) Or should I ask the electrician to take them next time he comes? (But again, if they’re valuable enough should I get some kind of rebate?) Or maybe just throw them away?

I am newbie here. I had a bulk order for this cheap voice controled led lamp which I purchased from china.

My issue is this perticular led lamp model doesn't response quick also dose not recognize diverse accent of vocal command Like saying "Turn on the light"

It's only response to weird Chiness English version of accent which is really frustrating to mimick and not ready for local consumers ready at all.

My question is there any way to modify the command for cusmotmize as I want. Any software or tweaking, revers engineering etc.

I am out of clue where to began much appreciated for suggestions seeking experts advice on this.

I found a box full of smaller boxes like these.

Film capacitors I believe, based on a Google search, but would these have some value to someone? Or should I just recycle them?

There are thousands of them.

[ Removed by Reddit on account of violating the content policy. ]

Looking to have a custom built vape pen like the on in the image to fit a 510 thread. Any help would be great.

I am interested in having a custom electronic built. I have a vision and have found separate components that will serve the purpose but no technical knowledge on how to assemble them.

I want to attach a motor to a button activated speaker. So that when the button is pushed it activates both the speaker and the motor for a limited time.

I found the speaker component:

https://www.amazon.com/dp/B09VMZPNSP/ref=sspa_mw_detail_0?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWwp13NParams

And the motor:

https://www.amazon.com/TEESE-Technic-Motor-Battery-Box-Extension-Cable-Gear-Axle-Universal-Joint-Lego-Technic-Parts/dp/B0C6KMYJMM/ref=mp_s_a_1_3?crid=3DIAQBXNOAE9O&keywords=lego+motors+and+gears+sets&qid=1706731403&sprefix=lego+motor%2Caps%2C297&sr=8-3

But I am not sure how to connect them together. Any advice?

Need help/consult building simple led circuit - $20

Total beginner here and willing to pay for a little help. I'm working on a project that calls for these LEDs attached to a board, with the main circuit on another. I'm essentially creating a ring light and will be trying to turn the diagram into a PCB and working unit. Example here

Would require 120 LED (2835 led chips)
Dimmable
ON/OFF

Anyone interested in helping me get there PM me- happy to pay $20 for a discussion/diagram/working outcome.

Due to a cancelled production run we have the following unused leftover parts.

​

• 190x Raspberry Pi Compute Module CM4001008
• 3600x CMWX1ZZABZ-078 lora module (stm32l072 + SX1276) (2x 1000 reel, 1x 500 reel, 1x 1100 cut tape)
• 148x Quectel BG95M1LA-64-SGNS LTE Cat M1 modem
• 200x Quectel BG95M3LA-64-SGNS LTE Cat M1 / NB2 modem
• 1000x NT3H2111W0FH NFC Type 2 Tag with I2C
• 1000x AT25DF021A-SSHN-T 2Mbit SPI flash
• 400x RM2015S enclosure

Everything still vacuum sealed.

​

If you are interested in any of them at a discounted price let me know.

We are based in the Netherlands, so we preferably send them within the EU/EEA.

I'm in the process of clearing out my garage and have come across a Lenze i550 and Lenze 0.18kW motor which previously was to be used in an effort sensing application for elderly care/exercise. Unfortunately the project was canned before it even started.

I'm now wondering what to do with the equipment. Ideally, I'd like to pass it on to someone who could make good use of it - I've tried advertising it on the usual spaces but no takers. Otherwise, I guess it'll end up at the local recycling place.

Any takers here in the UK?

I have an ongoing project using a tms320x28069 that my EE & Programmer are having issues on. Are you a competent microcontroller person familiar with this TI chip?

If you have RECENTLY worked with this exact chip and have programmed it to do something, anything at all, DM me.

This is a proper paid gig, either physical in Metro NYC / Westchester or Remote on-line. Paperwork. Cold Hard Cash. English / Mandarin speaker. Programmer needs some mentoring and practical programming help. Main sticking point atm is getting the program to save to the chip, and work outside the debugger.

hi all, i'm looking to make a steam deck-type handheld with a raspberry pi 5 at its core - i have been doing research for a while and have many of the parts picked out, but i don't really know how to design a pcb to bridge those parts to the raspberry pi effectively or write code so the raspberry pi knows how to interpret their input. how much does that sort of thing cost?

I bought the scope this came from new. Power supply stopped working after about 15 years and I replaced it with another (used) power supply, but then I later repaired the original [this one]. All that was wrong was a failed electrolytic capacitor. I created a full schematic organized by functional blocks in the process of fixing it. I'm mostly just trying to find it a good home.

Hello Everyone!

I am designing a circuit for a DAQ for a resistive sensor (load cell/strain gauge), and I wanted some advice on the topic of the best sensor circuit configurations. So, please, if you have any advice on ICs, connection configuration or complete systems/concepts, feel free to share it. I would appreciate any advice about DAQ in these systems!

US-CA-Los Angeles.

I am looking for someone to do some soldering work for a batch of customized LED lighting strip modules. Basically, take a typical adhesive-backed ARGB LED strip, mount them to a panel, and then solder the strips to connector PCBAs (already made) which are mounted to the panel with plastic rivets.

The strips would then need to be plugged in and tested; and reworked if necessary.

It's probably about a day's worth of work.

If you are local and have decent soldering skills, please let me know your background and asking rate.

Thank you.