Differences
This shows you the differences between two versions of the page.
|
projects:spectrumanaliser:step1_hardware [2012/05/05 11:18] elger |
projects:spectrumanaliser:step1_hardware [2016/11/16 13:06] |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | **UNDER CONSTRUCTION** | ||
| - | ====== Spectrumanaliser Hardware ====== | ||
| - | |||
| - | There are four hardware components in my spectrumanaliser project; | ||
| - | * Power-supply | ||
| - | * Arduino (clone) | ||
| - | * Opamp | ||
| - | * Display | ||
| - | |||
| - | Here is a short description of why they are needed and how they are connected. | ||
| - | {{:projects:spectrumanaliser:spectrumanaliser_overview.png}} | ||
| - | |||
| - | ===== Power-supply ===== | ||
| - | |||
| - | Usually I would not mention this separately but there is one important thing to know about powering this project. | ||
| - | |||
| - | The Opamp (audio amplifier) is very sensitive. If there is a lot of noise on the power-supply then the opamp. So the best thing to prevent interference from the display on the audio signal is to have one power source for the Arduino and opamp, and another one for only the display. | ||
| - | The Ground (0 Volt line) of both supplies must be connected (of course). | ||
| - | |||
| - | I simply made two 7805 circuits and joined the GND together. | ||
| - | |||
| - | {{:projects:spectrumanaliser:spectrumanaliser_powersupply.jpg?200|}} | ||
| - | |||
| - | ===== Arduino (clone) ===== | ||
| - | |||
| - | This should speak for its self, I used a Atmega328P based arduino (a.k.a. Arduino UNO). And the clone I have works just as well. Actually, the clone board has the "portb" marked much clearer so finding the right pins was much easier. | ||