Raspberry Pi power and mounting

I’ve been in need of a good way to mount my growing collection of Raspberry Pis (rpi) and to power them from a convenient power supply. Wall warts are notorious for not supplying the correct voltage or meeting the right amperage requirements. To that end, this article was begun.

A bit about my needs, I have a rpi that includes additional hardware in the form of what is called a “hat” and also a SATA hard drive. This hat fits on top of the expansion header on the rpi, and provides additional functionality. For this article, I will be using the club repeater antenna monitor system as an example.

The initial setup consisted of a rpi, a Pi-plates DAQCplate (for Analog to Digital Conversion), and a SATA to USB board for the hard drive. The system runs from a 5Vdc/4A AC/DC power supply (wall wart). During testing under load, the power supply regularly dropped to 4.8Vdc. The rpi requires a voltage between 4.8 and 5.2Vdc. Below 4.8Vdc, the whole system becomes unstable, with possible loss of data, poor A/D acquisition, and a whole host of other issues.

After a fair amount of searching, I came upon a hopefully better approach to the power supply issue, in the form of the Bitscope Blade Uno Pi (BB01). This has a few useful features beginning with a wide range (9 to 48Vdc) power supply which outputs 5Vdc at 3A (4A peak). This allows me to use any of my ham radio power supplies and/or battery systems to power everything. Additional features of the BB01 include an extra 5Vdc power header, and dual USB jacks to power other devices.

More to come soon!

Avast antivirus has unblocked our website

From Avast antivirus:

Our virus specialists have now cleared its [brars.cc] reputation in our database. With URLs this change should be instant, but it might take up to 24 hours with files.

Best regards,

Avast Customer Care

Field Day 2019

The Blue Ridge Amateur Society would like to invite you to our annual Field Day event.

Where:
Riverbend Park located at 175 Riverbend Rd, Greenville, SC 29617

BRARS field day signs will be posted at the entrance of the park and intersections leading up to it.

Talk-in: 146.610 will be monitored throughout the event to provide information. Site radio will be on 147.610 simplex for use on the site and nearby.

Field day activities will begin Friday evening June 21 at or about 1700 hours ( 5 pm ) with the loading of field day equipment from the club storage building. Setup will begin Saturday June 22 at 10 AM.

Anyone wanting to participate, please contact
Nathan Allison (KJ4RQZ) at 864-884-1373.

We will be setting up 3 stations (Class 3A), consisting of 2 club owned stations powered by generators for HF, voice, GOTA (get on the air) and CW operations plus 1 privately owned Digital station.

Please feel free to bring any equipment that you may want to experiment with, or otherwise need assistance with.

Commercial power is available in the form of 20 amp/120V, 30 amp/120V RV and 50 amp 120/240V for a fee of $20.00 per connection.

Bathrooms are available on site. Tent camping as well as RV’s are welcome.

A covered dish dinner will be served at 6pm with BRARS providing grilled hot dogs, hamburgers, buns and condiments.

Anyone attending dinner is asked to bring a drink of their choice (non-alcoholic) and a covered dish.

Please arrive one hour (5pm) before dinner time to allow for the correct amount of grilled items to be prepared.

The event will conclude with taking down of and returning of equipment to storage on Sunday, June 23 at or about 1400 hours (2pm).

ARRL_FieldDay_2019

Upstate Hamfest update

We are happy to announce the following main prizes for the Upstate Hamfest on Saturday, May 4th.

Our Grand Prize is a Yaesu FT-891 HF/50 MHz transceiver, drawing will occur at 2pm. Second Prize is a Kenwood TM-V71A 144/440 MHz Dual Band Transceiver, drawing at 1pm. Third Prize is a Yaesu FT-65 144/440 MHz Dual Band Transceiver to be drawn at noon.

Please note: You do NOT have to be present to win the Grand, Second, and Third prizes. For the hourly and door prizes, you DO have to be present to win.

You can get your tickets online now on our website.

Wrong times on our calendar

Hey folks,

A user recently noted that ALL of the times for events on our calendar are off by an hour due to the recent time change. Please bear with us, as we figure out a fix for this.

Thank you,
KJ4CTD

Now seeking Hamfest volunteers

It’s that time of year again for our Annual Hamfest!

We are currently seeking volunteers for all sorts of things, from setup or tear down, to manning the gate, or providing assistance at the club table and other areas through the Hamfest.

We invite you to please use our Hamfest Volunteer Signup form.

Thank you!