Creative Engineering

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

V1.0 - 05/02/2013

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 :

• 1: 5V
• 2: Gate
• 3: GND
• 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”.