Wednesday, February 22, 2012
Sunday, February 12, 2012
Friday, February 10, 2012
AVR DDS Function Generator
AE EP#23 AVR DDS Function Generator
From: AmateurEngineer | Jan 15, 2012 | 117 views While exploring the different methods of generating some waveform I stumbeled on an old project of mine that has been shelved for almost a year because it would not work no matter what I tried. So I got out, redesigned the pcb, soldered new components and wasted 4 hours tracking down some trace issues. But in the end I had a working DDS function generator based on this simple but effective design: http://www.scienceprog.com/avr-dds-signal-generator-v20/
From: AmateurEngineer | Jan 15, 2012 | 117 views While exploring the different methods of generating some waveform I stumbeled on an old project of mine that has been shelved for almost a year because it would not work no matter what I tried. So I got out, redesigned the pcb, soldered new components and wasted 4 hours tracking down some trace issues. But in the end I had a working DDS function generator based on this simple but effective design: http://www.scienceprog.com/avr-dds-signal-generator-v20/
AE EP#26 The Ultimate Breadboard
Posted on February 4, 2012 by admin
While I was working on my Oscilloscope project I discovered, that breadboards are only semi-useful for Bigger things. Everything seems not to add to your project but to just pile up on it. After you added some probes and things that need a bus you will sit on a fragile, unforgiving crapstack, that just waits for you to stick a jumper-wire in the wrong hole. So I decided to make myself some room on the board and push connectors, displays and meters away from the center. Just take a look what came out:
check out the vid to get a walkthrough
So here is a little list what it includes:
Some words on construction:
While I was working on my Oscilloscope project I discovered, that breadboards are only semi-useful for Bigger things. Everything seems not to add to your project but to just pile up on it. After you added some probes and things that need a bus you will sit on a fragile, unforgiving crapstack, that just waits for you to stick a jumper-wire in the wrong hole. So I decided to make myself some room on the board and push connectors, displays and meters away from the center. Just take a look what came out:
check out the vid to get a walkthrough
- 2 max 232 Level converters
- An arduino NG
- 3 BNC connectors
- 8 banana Plugs
- A 50 V voltmeter
- Tiny tiny breadboard for displays and button stuff
- 4×7-segment display with driving transistors
- Datavision DV-20208 HD44780 compatible LC-display
- 2x lm3914 bar-graph displays with jumper selectable voltage range
- Avr-Net-IO for some Ethernet
- A -10V -5V GND +5V +10V earth 0V 35V Power supply
- and of course a humongous breadboarding area
Some words on construction:
The base is made from a piece of structured plastic (45 x 30 cm) on top of that are some pieces of wood with some plastic veneer that form the body. This makes up the wedge form in the back. On top once again I used some sign plastic covered with red spraypaint, why red? because its shiny :)
Ground and Earth are normally separated and can be connected on demand.List of inspiration and component
- http://www.meakesselsdorf.de/projekte/ledanzeigeinstrument.htm
- http://www.pollin.de/shop/dt/MDg0OTc4OTk-/Bauelemente_Bauteile/Aktive_Bauelemente/Displays/LCD_Modul_DATAVISION_DV_20208.html
- http://www.pollin.de/shop/dt/MTQ5OTgxOTk-/Bausaetze_Module/Bausaetze/Bausatz_AVR_NET_IO.html
- http://www.oppermann-electronic.de/html/sortimente.html the Voltmeter was in this pack: Einbau-Meßgeräte-Sortiment 10 verschiedene, Volt- und Ampermeter und Hz-Messer
- Here is a little zipfile containing the PSU-design and the VU-meter: PSU_LM3914
Subscribe to:
Posts (Atom)