The 8 pin ATTiny45 is a very small but powerful controller. However, if you need an external crystal, there are only very little I/O pins left. The current version of Objective Development’s Firmware-Only USB Driver offers a new option: It can be compiled to run with 16.5 MHz +/- 1% clock. This clock rate and precision can be met with the ATTin45’s internal RC oscillator.
EasyLogger is a simple example which does not require any host software. It presents itself as a USB keyboard to the host and automatically enters the values it measures. To get a series of measurement values, just open a text editor or even a spreadsheet like Excel and press the start/stop button on the logger. EasyLogger will start to type values directly into your host application.
Download
| Download EasyLogger | ||
|---|---|---|
| EasyLogger.2012-12-08.tar.gz |  Download | 197 kB |
| EasyLogger.2012-12-08.zip | Download | 228 kB |
| EasyLogger.2008-02-28.tar.gz | Download | 176 kB |
| EasyLogger.2008-02-28.zip | Download | 197 kB |
| EasyLogger.2007-07-19.tar.gz | Download | 170 kB |
| EasyLogger.2007-07-19.zip | Download | 190 kB |
Release Notes
Release 2012-12-08
- Disable interrupts during oscillator calibration. Make sure that we are not interrupted while we count CPU cycles.
- Updated to latest driver.
A single sided EAGLE PCB layout can be found at http://olgatronic.free.fr/?p=3. Click on "Fichiers Eagle" below the image.