Tag Archives: DIY

The ArduINA226 power monitor

via Dangerous Prototypes

ArduPicLab published the details on how to build a current, voltage and power datalogger with Arduino and the INA226 module:

In the past I have developed various projects of ammeters based on Hall effect current sensors such as the ACS712, or on High-Side Current-Sense Amplifiers such as the MAX4080SASA or made with operational amplifiers. All these systems have an analog output which must then be digitized. The INA226 sensor has a digital output and incorporates a 16-bit ADC for which a high accuracy and precision is obtained.

DIY motion simulator

via Dangerous Prototypes

Bogdan Berg has been working on a DIY motion simulator:

As you may have seen from some of my other posts on this blog, motorsports and cars in general are one of my passions. I try to attend at least couple track days in a season, and enjoy circuit racing greatly. However, costs can add up quickly, and living in Seattle leaves us with a lot of rainy days through fall/winter/spring, somewhat limiting the time window for optimal conditions on the track. Although racing in rain as an art in itself… 😉

See the full post at bogdanberg.com.

Check out the video after the break.

DIY long lasting voltage regulator circuit for Raspberry Pi

via Dangerous Prototypes

Jithin @ rootsaid.com writes:

Raspberry Pi is simple, handy and cheap yet powerful single board computers of all time. It has USB ports to connect hardware such as pen drive, keyboard, mouse, HDMI port for display out, 3.5 mm port for audio and several GPIO pins to work with embedded projects, all of which can be powered using a mobile charger. You can even make it portable by simply connecting the mini USB port to a mobile phone power bank so that you can use your pi on the go. But if you connect more USB devices and use the GPIO pins, the power bank will drain off quickly. In this post, I will tell you how i made my own power supply unit using a Lithium Polymer battery and a voltage regulator.

Project info at rootsaid.com.

Building my own 50Ah LiFePO4 lithium battery pack

via Dangerous Prototypes

Kenneth Finnegan posted his DIY 50Ah LiFePO4 lithium battery pack build:

Several years ago, I had purchased a 20Ah 12V Lithium Iron battery pack from Bioenno for my various 12VDC projects. To help protect it, I ultimately built it up into a 50cal ammo can with a dual panel-mount PowerPole connector on the outside, which has proven really nice as far as battery boxes go:
*20Ah is a decent battery capacity for a small load
*The packaged Bioenno pack left some space inside the box to also store the charger it came with, some PowerPole accessories, etc
*The fact that you’re able to close up the box and use the power connectors on the outside once you’re using it is real nice

More details on The life of Kenneth blog.

Low cost open source ventilator

via Dangerous Prototypes

Johnny Chung Lee writes, “In the event that COVID-19 hospitalizations exhaust the availability of FDA approved ventilators. I started documenting a a process of converting a low-cost CPAP (Continuous Positive Airway Pressure) blower into a rudimentary Ventilator that could help with breathing during an acute respiratory attack. If interested, follow along the Github Project“

More details on Procrastineering blog.

DIY 18650 Powerwall with onboard BMS

via Dangerous Prototypes

A DIY 18650 Powerwall with onboard BMS @ openhardware.co.za

While I cannot afford a Tesla PowerWall, I’ve spent some time drawing up a PCB to house 7x 18650 cells in series. Each board has onboard Battery Management:
*Overvoltage Protection (per cell)
*Undervoltage Protection (per cell)
*Balance Charging
*Overcurrent Protection
*Main pack Fuse

The design files are available on GitHub.