Prototypes has arrived!

About a week ago I got home my prototypes. Have some extra features on these cards compared to my standard ECG I built in January. However, several of the circuits are BGA welded and therefore requires machines that assemble them. Lucky, I know a company that does this and they are very talented! So in about a week, I introduce some more data on performance from this cards!

EKG

Low Power ECG, EKG (Heart Rate monitor)

With the MCU software-filtering, and added components for hardware filtering I made the signal real good. So I manage to build a 3- to 5- point ECG, EKG at the expense of 5€.

Below is the live plot to matlab presented and an scheme of the ”standard” EKG pulses. During this logging three points were uses on the body to measure. Note that an EKG at hospital has 6 to 8 points. Still the results is awesome. One can even se the ”U-wave

 

So this is my EKG!

ekg_COMP

 

Positioning and mapping for soldiers and first responders

The master thesis presentation is DONE! FOI ware present during the presentation at Chalmers, Gothenburg.

 

In the end of the presentation I showed a video of the UGV in action with one of the sensor from FOI mounted on top.

Some fact about the sensor system ( From FOI )

It is a technical challenge to create a positioning system that is accurate enough in GPS-denied environments. Accurate positioning would increase the safety for smoke divers, other first responders and soldiers operating in unknown indoor environments. It could be used for rapid search and rescue, to prevent firefighters and soldiers from getting lost, and to help a sector leader or incident commander keep track of the positions of firefighters or soldiers currently searching a building.

We develop a camera-based system, Chameleon, which is composed of two thermal infrared cameras, a stereo vision camera, and an inertial measurement unit. Chameleon is a system for simultaneous localization and mapping (SLAM), which navigates by tracking a number of landmarks (e.g., corners, lines or other points of interest in the camera images) as the camera moves through a scene. The system operates both in daylight and darkness, and can produce maps of visited environments.

The Chameleon system has been developed in the Armed Forces’ project Surveillance Systems. It has been adapted to smoke diver applications with funding from Security Link. The adapted system includes thermal infrared cameras in order to see through smoke and in darkness.

 

the video below shows the system mounted on the UGV

 

Master thesis project

So, parts of my master thesis project will be presented here on my blogg (due to the length of the report/project). Hopefully it will give interest to others, and even a little help to their own project.

Press the image to get to the Project side, or go to Chalmers—> Master thesis

link to the video: Video of the UGV with control

 

UGV_IRcamera

 

 

Produkt till Developed by Lovgren

Jag startade mitt egna lilla företag för antal veckor sedan. Detta för att kunna ta hand om alla de förfrågningar jag får ang konsultationer, projektledning m m. Men även för att kunna generera och sälja egna produkter (småskaligt). Första produkten blev en Rotary encoder som klarar upp till 30’000rpm. Encodern är magnetisk , finns många fördelar, en är att den roterande enheten och encodernp behöver ej ha mekanisk kontakt.

20140607-154057.jpg

Laga MacBook-Laddare

Som många säkert varit med om så går laddarna/ackumulatorn sönder till MacBook datorerna. Personligen anser jag att det är ett koncept av Apple att tillverka dessa på det sätt så de lätt gå sönder. (Förklaring kommer senare)

Nåja, jag har lagat en 5-6 st och nu tänkte jag göra en sida om detta, hur man själv kan laga dessa med enkla medel. Läs mer HÄR!

20140323-105047.jpg

Långtidstest av produkten – Frö till Frukt

Plan och utförande

Så var det dags att så :) Jag kommer logga temperatur samt relativ luftfuktighet i första stadiet, med en extern givare (ty för mycket ”ånga” kommer skada prototypen Delectric Plant Guard (DPG) ) . Slutgiltiga produkten kommer ha ett skyddande hölje som gör den vädertålig.

Jag skall testa att använda en Sensirion STH75 sensor Denna skall vara till god hjälp för att kunna logga bra värde på storheterna.

När sedan det blivit dags att plantera dem i en riktig kruka kommer jag att använda DPG (tillsammans med sensation givaren) under hela våren och sommaren. Jag ska försöka presentera mätdata så ofta jag kan, om ni är intresserade av detta test så kommer jag lägga upp det HÄR, finns även att finna i projekt-fliken!

Inköp på Blomsterhaga

  • Mini växthus – 144 SEK
  • Plant krukor (set) – 44 SEK
  • Chili-fröer -23 SEK
  • Aubergine-fröer – 17 SEK
  • Körsbärstomat-fröer – 23 SEK

DSC_7296

Schematics (kopplingsschema) on the Self balancing robot

majority of people have been asking for wiring diagram of the self-balancing robot, so now I finally got done drawing so you can download it. (go to project–>self-balancingrobot–>hardware, or press the image below)

  • Note that I use external voltage regulators to supply the sensors and Arduino, this because I noticed that Arduino did not handle the strong reverse currents that origins from the motor-driver. External voltage withstand reverse currents up to 30A, while the internal managing around 1A. It solved many strange phenomena on the robot!

Self_balancing_robot_schematics