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We love the Otii Arc! It is a truly versatile power supply and analyzer. Coupled with powerful but easy-to-use software, it is an ideal tool to help study the power draw of your IoT project or device. It can record and display real-time currents, voltages and/or UART logs. It provides nanoamp resolution current measurements with a sample rate of up to 4000 samples per second!
Otii (pronounced like naughty) is handy in all sorts of troubleshooting situations. The Otii truly shines with any device that needs to be designed to sleep for low power and has to run 'a long time' on a battery. The Otii Arc can measure current very accurately over 8 orders of magnitude from tens of nanoamps up to 5 Amps. This means you can measure the sleep current of a board and the peak current draw all in one continuous measurement. Leave the system logging for hours then read the minimum, maximum and average current and power use straight from the oscilloscope-like recording. By linking the Otii Arc to a UART (Serial) pin and/or a GPIO pin, you can immediately see what the current draw was while the code was performing a specific task. Stop guesstimating what your runtime will be and prove it!
One of the features we really love is that you can connect a battery to the Otii Arc. The Otii Arc can then discharge the battery while recording the voltage and current profile. The Otii Arc can then emulate that same battery, time and time again, saving you the trouble of having to replace or recharge the battery between tests. Want to see how your board will perform when connected to a particular LiPo battery? The Otii Arc lets you do exactly that. (Battery discharge, profiling and emulation requires an additional Otii Battery Toolbox license.)
The Otii Arc has a USB interface to connect to your laptop or computer. It can use USB as its main power source and deliver up to 4.2V at 250mA to the board under test. Connect an external power supply (7.5 - 9 V) and Otii Arc can deliver up to 5.0V at 2.5A continuous, 5A peak! The accompanying software is available for Windows (7 & 10, 64-bit), macOS (High Sierra or later) and Ubuntu (18.04 or later, Intel 64-bit).
- USB Power Supply
- Output voltage (auto range): 0.5V - 3.75V
- Output voltage (locked to high current range): 0.5 V - 4.2 V
- Output voltage setting resolution: 1 mV
- Output current: 250 mA
- External 7.5 – 9 V Power Supply
- Output voltage (auto range): 0.5 V - 4.55 V
- Output voltage (locked to high current range): 0.5 V - 5.0 V
- Output voltage setting resolution: 1 mV
- Output current (max continuous): 2.5 A
- Output current (max peak): 5 A
- Programmable Current Sink (requires an Otii Battery Toolbox license)
- Sink current: 0 A - 2.5 A
- Sink current resolution: 39 µA
- Sink voltage (USB power supply): 0.85 V - 4.2 V
- Sink voltage (external power supply): 0.85 V - 5.0 V
- Current measurement
- Accuracy: ±(0.1% + 50 nA)
- Sample Rate in ±19 mA range: 4 ksps
- Sample Rate in ±2.7 A range: 1 ksps
- Sample Rate in ±5.0 A range: 1 ksps
- Analog bandwidth (3 dB): 400 Hz
- Voltage measurement
- Total accuracy: ±(0.1% + 1.5 mV)
- Sample Rate: 1 ksps
- UART
- Bitrate: 110 bps - 5.25 Mbps
- Bitrate: 110 bps - 5.25 Mbps
- Digital I/O; GPO1, GPO2, TX
- VIO Expansion port operating voltage: 1.2 V - 5 V
- VIL Low-level input voltage: VIO * 0.2 V
- VIH High-level input voltage: VIO * 0.8 V
- Imax Maximum sink/source current: 10 mA
Exact shipping can be calculated on the view cart page (no login required).
Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).
We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):
- $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
- $7+ for Standard Post (typically 6+ business days, tracked)
- $11+ for Express Post (typically 2+ business days, tracked)
- Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.
Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.
Some batteries (such as LiPo) can't be shipped by Air. During checkout, Express Post and International Methods will not be an option if you have that type of battery in your shopping cart.
International Orders - the following rates are for New Zealand and will vary for other countries:
- $12+ for Pack and Track (3+ days, tracked)
- $16+ for Express International (2-5 days, tracked)
If you order lots of gear, the postage amount will increase based on the weight of your order.
Our physical address (here's a PDF which includes other key business details):
40 Aruma Place
Cardiff
NSW, 2285
Australia
Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.
Have a product question? We're here to help!
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