Share this project

Done

Share this project

Done
A fully custom EEVblog Electronics Multimeter designed by Dave & UEI, with many exclusive features like SD card logging & Bluetooth!
A fully custom EEVblog Electronics Multimeter designed by Dave & UEI, with many exclusive features like SD card logging & Bluetooth!
2,296 backers pledged AU$ 644,674 to help bring this project to life.

About

EEVblog 121GW Multimeter project video thumbnail
Replay with sound
Play with
sound

AU$ 644,674

2,296

What is a prototype?

A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:

Proof of Concept

Explorations that test ideas and functionality.

Functional Prototype

Demonstrates the functionality of the final product, but looks different.

Appearance Prototype

Looks like the final product, but is not functional.

Design Prototype

Appearance and function match the final product, but is made with different manufacturing methods.

Production Prototype

Appearance, function, and manufacturing methods match the final product.

5ed62ffa69d8b85e414ef1f8cf6e2a52 original

Prototype Gallery

These photos and videos provide a detailed look at this project’s development.

A unique, feature packed Multimeter which has been developed with electronics designers and hobbyists in mind. This multimeter represents two years of collaboration between EEVblog and UEI.

 

This is not a re-badged meter, nor a modification of an existing meter design. It was designed from the ground up to be a unique electronics oriented meter in the sub US$250 class price category.
Please note that being based in Australia, I have to use Kickstarter Australia who force pricing in Australian dollars.

Designed for electronics use, with unique features such as:

  • Bluetooth connectivity (multi-device capability)
  • Open Source Cross Platform application software (Android + Windows, and more soon)
  • 15V Diode Test Voltage (useful for Zeners + LED strings etc)
  • VA Power measurement
  • Low Burden™ voltage 
  • Unique burden voltage display
  • Micro SD Card data logging + firmware updating

Other major features include:

  • Dual 50,000 count display with bargraph
  • 0.05% + 5 Basic DCV Accuracy
  • Auto-Hold measurement
  • 600V CAT-III with independent UL 61010 certification by ETL
  • Safe operation through HRC fuse + TVS + PTC + MOV + Diode Bridge protection

Hardware Features:

  • AD8436 >100KHz True RMS
  • 4 x AA battery powered with 500+ hr battery life
  • Compact design - 84 × 165 × 59 mm (W × L × H)
  • Hackable ST ARM Cortex M3 processor (S-LINK/V2 programmer interface inside)
  • Hycon HY3131 chipset
  • MAX4238 Low Offset Amplifier for current ranges
  • SD Card firmware update
  • Full Open Schematic available
  • 8ppm ADR3412 voltage reference

The user manual with full specifications can be found HERE

The meter is manufactured by UEI Test Instruments, a reputable US based designer and manufacturer of high quality test gear. The design work was primarily done by UEI, but with a great deal of design input and direction from Dave. The meter is manufactured in South Korea.

The meter features the same MAX4238 chip used in the EEVblog µCurrent™ product to give lower burden voltage than typical meters.
You can read all about Burden Voltage in Dave's article HERE that was published in Silicon Chip magazine.

NOTE: EU shipping, as many people have asked.

I am talking to a test equipment company that have offered to do re-shipping in the EU for me, so hopefully the customer can avoid any import taxes. But please note this is not a guarantee, it's just to say I'm investigating and trying to solve this issue for backer in the EU.
My backup plan is to ship on my DHL Express Courier account from Australia, so import taxes may apply in your country, so please take this into account as a worst case.

Risks and challenges

Like all hardware projects, hardware is hard, and "sh!t happens".

Compliance:
The 121GW has already passed ETL, FCC, and CE testing and we have the certificates. No worries there.

Hardware:
The 121GW design is ready for production, we have 50 early production units in-hand and going to EEVblog supporters. But that doesn't mean there is zero risk of a hardware issue that we haven't found yet. Such a hardware issue if found would likely result in a PCB re-spin and subsequent delay to full production.

Software:
The firmware in the 121GW is updateable by the user via SD card, so it's easy to fix bugs, and to add and polish features etc.
Any risk would come in already shipped units if we find an issue with the bootloader code. This would require a ST Micro programmer and header cable. But the bootloader only controls the LCD, buttons, and SD card routines, so this is unlikely.
The application software is still under development, and although it has been written to be as cross-platform as possible, we have not tested, iOS, Mac, or Linux compilations yet. Only Windows and Android have been tested. Bugs remain as of writing, we are working on those.
It's fully open source though, so you can take it and run with it.
So there could be issues here that delay introduction of software on those platforms not supported yet.

Production:
I guess that South Korea getting attacked by North Korea is a possibility?
The 121GW is made in South Korea, so yeah, that could potentially be an issue maybe?
Otherwise, regular production line caveats apply.

Component Supply:
There are currently two components identified that have long supply lead times, and whilst we have factored this into the delivery dates for the given numbers, this is not within our control, and parts could be delayed longer than expected.

The campaign goes gang-busters:
If we get a million backers then Dave will have a heart attack and this could delay things significantly whilst he's in hospital recovering.

Learn about accountability on Kickstarter

Questions about this project? Check out the FAQ

Support

  1. Select this reward

    Pledge AU$ 5 or more About $4

    Woah, This Is Heavy

    You get to troll the comments section, and get all the project updates. Dave gets chocolate. Bargain!
    PLUS you get an exclusive EEVblog video of the development history of this meter.

    Less
    Estimated delivery
    74 backers
    AU$
    Kickstarter is not a store.

    It's a way to bring creative projects to life.

    Learn more about accountability.
  2. Reward no longer available

    Pledge AU$ 250 or more About $190

    Great Scott!

    EARLY BIRD PRICE!

    You get the first batch units hot off the production line in December.

    PLUS a custom EEVblog Carry Case
    PLUS you get an exclusive EEVblog video of the development history of this meter.

    LIMITED QUANTITY!

    Delivery is via DHL express courier outside of Australia and is extra.
    AU$30 For outside Australia, AU$8 inside Australia

    Less
    Estimated delivery
    Ships to Anywhere in the world
    Reward no longer available 450 backers
    AU$
    Kickstarter is not a store.

    It's a way to bring creative projects to life.

    Learn more about accountability.
  3. Select this reward

    Pledge AU$ 265 or more About $202

    Johnny B. Goode

    One 121GW Meter from the second production batch.

    PLUS a custom EEVblog Carry Case
    PLUS you get an exclusive EEVblog video of the development history of this meter.

    Delivery date estimate will be contingent upon backer numbers and production capability.
    It could be earlier for those who get in early on this reward level, first come first delivered.

    Delivery is via DHL express courier outside of Australia, but the actual service might change for large volumes. Delivery is extra.
    AU$30 For outside Australia, AU$8 inside Australia

    Less
    Estimated delivery
    Ships to Anywhere in the world
    1,757 backers
    AU$
    Kickstarter is not a store.

    It's a way to bring creative projects to life.

    Learn more about accountability.

Funding period

- (10 days)