Thermocouples

Check out Jim William's Excellent App note AN28. Error Sources in Thermocouple Systems include: Connection wires Cold Junction uncertainties Amplifier error Sensor Placement

Beagle Bone Black Static IP

Static IP Address under Debian According to Derek Molloy's website it is easy to set a static IP under Debian: http://derekmolloy.ie/set-ip-address-to-be-static-on-the-beaglebone-black/ [Updated April 2015] To set the IP address to be static under Debian is quite straightforward. You can simply alter the /etc/network/interfaces configuration file to manually specify the address (e.g., 192.168.1.80 in this case), the network … Continue reading Beagle Bone Black Static IP →

U-Blox M8 Configuration

Relevant information found on page 134 of the receiver description and protocol specification: https://www.u-blox.com/sites/default/files/products/documents/u-blox8-M8_ReceiverDescrProtSpec_(UBX-13003221)_Public.pdf Turn on GGA message (1 per second)[0xB5, 0x62, 0x06, 0x01, 0x03, 0x00, 0xF0, 0x00, 0x01, 0xFB, 0x10]Message Class: 0xF0Message Identifier: 0x00 (GGA)Send rate on current Port: 0x01 Turn off GLL message:[0xB5, 0x62, 0x06, 0x01, 0x03, 0x00, 0xF0, 0x01, 0x00, 0xFB, 0x11] … Continue reading U-Blox M8 Configuration →

Beagle Bone PRU Reference

I only use the PASM (PRU assembler) for programming the PRUs on the BBB. I've had some issues with the TI C compiler. The best reference for the PRUs can be found in the GitHub reposotory here: https://github.com/beagleboard/am335x_pru_package In this repository is the best guide I've found for writing assembly code for the PRU as … Continue reading Beagle Bone PRU Reference →

Beagle Bone Black UART

To view the output of a device connected to UART4 on the BBB (I've got a 9600 baud GPS device sending data to P9.11) first set the RX pin to the correct pin mode. I running Debian on the BBB by the way. config-pin P9.11 uart Then view the streaming data with cat /dev/ttyO4 and … Continue reading Beagle Bone Black UART →

Radio Telescope Build

I'm working on a small Radio Telescope! You can follow my progress in the series of build videos below. The next thing I want to do is get Spyserver installed on the Raspberry Pi and try streaming a waterfall display over WiFi. https://www.youtube.com/watch?v=nBS96eeNwCI https://www.youtube.com/watch?v=l0sdw2E1jz0&t=2s https://www.youtube.com/watch?v=1jh0XZNexBg

Transitioning to KiCad

I just started working for a new company as an Electrical Engineer. At my old job, we used Altium designer to make schematics and PCBs. At my new job, my supervisor asked if I thought I could get by using a cheaper or free option. I'd wanted to learn KiCad anyway for a while, so … Continue reading Transitioning to KiCad →