I train bird dogs. One of the tools we use is a bird launcher I have a unique idea for one that involves RFID.

Basically, I want to build an add-on to the launcher. Ideally, it would be a UHF RF-ID tag that could clipped onto a dog collar and a remote solenoid added to the launcher. When the dog gets within 10-15 feet of the launcher it would automatically release the bird.

I have experience in building circuits and repair, but the actual design is not in my wheelhouse.

What would you charge to design this circuit? Ideally the remote circuit and battery, circuitry would need to fit into a 5X2X1.5-inch box

I would prefer to work with someone within a drivable distance of Youngstown say 2-4 hours.

If this isn't the right sub please direct me to one more appropriate.

Hey everyone!

I’ve been trying to find a manufacturer for an electronic device through Alibaba for several months, but I haven’t had any luck reaching a reasonable agreement. The main issue is that most manufacturers require large orders just to create a prototype, which isn’t feasible for me since I’m still in the development phase.

The device I want to manufacture is a waterproof bracelet with BLE5 that can connect with others and emit alerts based on set distances. It’s a relatively simple design; I already have a prototype on a breadboard and all the schematics ready, but it’s been challenging to find a lab or manufacturer willing to produce it at a reasonable cost and without excessive bureaucracy.

That’s why I’m reaching out to the community to ask for recommendations for factories, labs, or even independent developers who have experience creating electronic prototypes at a reasonable price. Any advice or contacts you can share would be greatly appreciated.

Thanks in advance! 🙏

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

I have an Apple HiFi that I'd like to update with tweeters, a rechargeable battery pack, and bluetooth connectivity.

Others have attempted / completed similar mods to this: *Tweeter Mod *LiPo Battery Mod *Airplay Mod

I'm interested to commission someone to complete these modifications for me, with the rechargeable battery pack being most desired, Bluetooth connectivity second, and tweeters third. Modifying the 30 pin dock to USB-C would also be a bonus.

The goal would be to retain to the external appearance of the unit while improving the audio quality and usability.

I'm located on the east coast of the United States.

If this is something you'd be willing and able to complete, please reach with a rough quote, including pricing, timing, and additional information required (e.g., desired battery capacity) to finalize the quote.

Thanks.

Where can I sell this stuff? Siglent SVA1075X - Siglent SDG6052X - Teledyne Lecroy Wavesurfer HD4096 oscilloscope WS4104HD

Im trying ebay and facebook but need gone. I know they're worth a lot and people messsge me knowing that but offer far below its value. Plus I dont want to lose thousands in ebay fees on top of taking a lower amount.

Electonics manufacturers always have dumpsters full of things that i could sell.

I used to take home 250++ pounds a week from Xerox Webster NY factory.

I now buy surplus electronics throuhht NY .... direct from companies or from workers whp fish it out of dumpsters.

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.

Throughout the school year, we have worked on proposing a US-based PCB manufacturer that offers fast deliveries through advanced manufacturing techniques and automation. To validate our project, we need to confirm if people could benefit from this service.

The form is designed to take only a few minutes. As a thank you, we would like to offer $10 for an additional interview to those who qualify.

Here is the link to the Google form: https://forms.gle/53ErPcyjkDuJBtwbA

Thank you for your time and valuable input!

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!

Mostly interested in components, new, and in large quantities. Not to interested in your old used hobby parts, unless they are out of the ordinary. ICs, semiconductors, connectors, switches, potentiometers, sockets, adapters, LCD/LED displays, sensors, tools, test equipment.

Would consider electronic assemblies, such as qty of subassemblies that went into a product your company made.

Not interested in TVs, stereos, cameras, PCs, phones ....unless they are NEW or exceptional (antiques, high performance ...?).

My interest is both as a hobby and for possible resale. I'd consider small or large quantities.

A bit leary of buying things from someone across the country who promises to ship it to me. If you want to ship it, I can pay once I receive it.

Mainly central NY, would consider longer drives if it's worth my time.

I'm looking for 8051 microcontrollers in a through hole / DIP package. I'm only interested in 16 pin packages or less ( 16, 14, 12, 10, 8, 6? ).

Not 18, 20, .......

Would want new, and qty of ~10+++.

My dad is a computer engineer and he had some spare pressure sensors that he told me i could sell, they are the spab-b2r-g18-pb-k1 and the spab-b2r-r18-pb-k1, and i couldn't find a steady price for any of them. they are ofc not brand new and only the r18 has original packaging. does anyone know what i can sell them for?

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

https://preview.redd.it/qo11uiec0pwc1.jpg?width=1747&format=pjpg&auto=webp&s=98db86b6182dd87ebf94966ec3ec6549b67c97f6

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 looking to purchase schematics for an analog synthesizer. Please get in touch if you think this is for you. I may have more opportunities in the near future.

Thank you

Hi all,

Mods: I've read the rules, there's no mention of asking to hire a dev here (specifically) - trust this is OK.

I've got several Eagle designs and am planning a new project to start with KiCAD; this will be a paid hourly gig.

• Widget: Integrating around SMT32 chips; typically IoT oriented.
• Budget: Fair project rate as the tasks will be well defined
• Project: Personal, you'll be helping me effectively
• Schedule: If we work well together, think long-term. There's no fixed end-date.
• Progress: Yes, at the moment I'm working with a dev board but one of the first tasks is to prototype a working target board, i.e. tying connectors and peripherals together.

Thank you so much, Best M (michael@inertialbox.com)

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'm currently in the midst of my internship at a company, and part of my job involves diving into the electrical system of a big agricultural tractor. I'm tasked with figuring out how efficient it is, how much energy is lost in the cables, and all that good stuff. The goal? To see if we can tweak any of the subsystems to make them better or if we need to rethink how everything's laid out.

Here's the thing: we're a small team, just a handful of engineers, and I'm feeling a bit lost on how to approach this. We've got a physical prototype sitting right here, but I'm wondering if it's worth creating a virtual model too. I'm not exactly an expert in how these kinds of problems are usually tackled in the industry, but I'm determined to give it my best shot and come up with something useful.

So, if you've got any tips or ideas on how I should go about this, I'm all ears. Any advice you can throw my way would be a huge help. Thanks a bunch in advance for your insights!

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?

Hello folks. If I have a JPG Fourth picture from top! or other picture of a circuit, with values and/or part numbers included, could someone be willing to transfer this to a CAD project/file, so that I can have it created? Make me an offer. I have had issues with doing it myself in KiCAD. I am always open to alternative solutions, and any recommendations. On the board, I'll need terminals for the coil and batteries, all labelled, and 4 additional terminals on two separate points in the circuit.

One pair of terminals would be Kicker - and +

4 pair would be for charging batteries, might need to be accommodating of larger gauge copper wiring.

3 pair would be connections to trifilar coil.

Device is a battery energizer and charger.

No schedule, just do it when they can.

This is personal.

I am in Champaign Illinois.

No work has been done beyond testing small prototypes.

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.