DIY XR2206 Function generator

My new XR2206 function generator. Based on an ELEKTOR circuit diagram from 1977. The XR-2206 is a monolithic function generator integrated circuit.

Features:
+ Square, sine, triangle, sawtooth wave output or pulses.
+ Frequency range from 10 Hz to around 200 kHz.
+ Amplitudes from around 0.01 V to 4 V (or more)
+ Audio output is possible

For demonstration a digital storage oscilloscope DSO 062 from JYE-Tech and a speaker were connected to the output.

Frequency can be adjusted by a ten turn wirewound precision potentiometer + multiplicator (x1, x10, x100, x1000) + another x2 multplicator.

Surprisingly most of the 1970s electrical components are still available. So it is ~ 99% the 1977 model. Only the original voltage regulator had to be replaced by a 7812 .

It should be noted that nowadays simple sound cards are better and cheaper function generators. However, I like this old technique. ;-)

Elektor kindly gave me the permission to post the links to the original articles from 1977 (German and English language):

www.elektor.de/120068

and

www.elektor.com/120068

Category:

Science & Technology

Tags:

• DIY
• XR2206
• Function generator
• DSO062
• oscilloscope
• function
• generator