===== 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 !

{{ :lfo_dlfo.jpg?300|}}==== Concept ====
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

==== Version ====
V1.0 - 05/02/2013

==== Schematic ====
The LFO is based on an ATTiny45/85 microcontroller.
{{ :lfo_sch.png |}}
  * 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

==== PCB ====
The Miniature 2.5x5cm PCB allows this LFO to be integrated in any design.
{{ :lfo_pcb.png |}}
Board connector is as follows :
  * 1: 5V
  * 2: Gate
  * 3: GND
  * 4: LFO Output

==== Design Files ====
Made with Eagle CAD Free version.
Download : {{:lfo.zip|}}

==== Software ====
Programmed using Arduino IDE for ATTiny mod. 
SW is currently under dev. Working demonstrator on breadboard, formal release "when ready".