Minimalist LFO Design
This LFO is 2.5*5cm big and provides a powerfull, gate triggable LFO to any of your design. Just plug in a 5V and watch the monitoring LED glow as your 0↔5V LFO is fed to your favourite synth. Here's the design !
This LFO has the following characteristics :
Output swing from 0 to 4.8V
Frequency from 0.5 to 10Hz
Faded LED to visualise the LFO State
Reset on the rising edge of a 5V Gate signal
Low component count
The LFO is based on an ATTiny45/85 microcontroller.
Analog Input on Pin 3 reads the “Rate” control, voltage from 0 to 5V
Triangle Waveform LFO Waveform is generated by the Microcontroller
LFO Output on Pin 5 (PWM Fast Mode) is filtered by R1/C1 to generate the 0-5V peak Triangle output
AMP control potentiometer controls the amplitude of the LFO Output
LED brightness is controlled by PWM as well
The Miniature 2.5x5cm PCB allows this LFO to be integrated in any design.
Board connector is as follows :
4: LFO Output
Made with Eagle CAD Free version.
Download : lfo.zip
Programmed using Arduino IDE for ATTiny mod.
SW is currently under dev. Working demonstrator on breadboard, formal release “when ready”.