Go to advanced search

by csatt
Wed Apr 20, 2016 11:17 pm
Forum: General discussion
Topic: voltage and current sensors
Replies: 7
Views: 3297

Re: voltage and current sensors

Hi Yousif, I built an IV curve tracer and posted the design on GitHub: https://github.com/csatt/IV_Swinger The documentation describes how I implemented the ammeter and voltmeter. I used the ADS1115 ADC and a 10A/75mV (7.5mΩ) shunt resistor. I tried the ACS712 for the ammeter. But my design uses rel...
by csatt
Wed Apr 20, 2016 11:01 pm
Forum: Automation, sensing and robotics
Topic: IV curve tracer for solar panels
Replies: 0
Views: 1022

IV curve tracer for solar panels

The IV Swinger is an IV curve tracer for photovoltaic (PV) solar panels. I built it for my friend Professor Gil Masters to use in the lab for his CEE176B course at Stanford. An IV curve plots the current and voltage generated by a PV panel for different load resistances ranging from short circuit to...
by csatt
Tue Apr 05, 2016 10:14 pm
Forum: General discussion
Topic: Power Supplu Requirements
Replies: 4
Views: 750

Re: Power Supplu Requirements

FYI, here are IV curves for a couple popular RPi power supplies: http://imgur.com/79Pmddz I generated these with an RPi-based IV curve tracer that I built for solar panels (search for "IV Swinger" on YouTube and/or GitHub if you're interested in knowing more about it). It's not intended for such sma...
by csatt
Fri Feb 20, 2015 6:54 am
Forum: Networking and servers
Topic: auto config wlan0 IP address in access point setup
Replies: 0
Views: 566

auto config wlan0 IP address in access point setup

I have a specific question, but first here is what I'm trying to do at a high level. I have a RPi-based project that will be used in places where there's no ethernet or wifi network - no internet at all. I just want to be able to directly connect to the RPi from my laptop via wifi to debug my softwa...
by csatt
Thu Jan 22, 2015 5:06 am
Forum: Troubleshooting
Topic: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+
Replies: 1425
Views: 1347577

Re: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 3.12.36+

Hi guys, If you update to 3.18.xx+ there is a version of the driver included in the image so you don't need to download a new driver, however, it needs a separate firmware file downloading and installing. You can download and install the driver firmware file with the single command sudo wget https:...
by csatt
Wed Jan 21, 2015 10:31 pm
Forum: Troubleshooting
Topic: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 4.xx.xx+
Replies: 1425
Views: 1347577

Re: (UPDATE) Drivers for TL-WN725N V2 - 3.6.11+ -> 3.12.36+

I just updated: [email protected] ~ $ uname -a Linux raspberrypi 3.18.3+ #739 PREEMPT Tue Jan 20 17:45:32 GMT 2015 armv6l GNU/Linux I tried - 8188eu-20150114.tar.gz which is the most recent driver but it gives me an error on the insmod: [email protected] ~ $ sudo insmod /lib/modules/$(uname -r)/kernel/dri...

Go to advanced search