Maxitronix-30in1-16

This is project #16 of the Maxitronix-30in1.

The KiCad files for this project are here:

• https://github.com/jj5/kicad-bench/tree/main/maxitronix/30in1/Maxitronix-30in1-16

See KiCad for some notes about my KiCad configuration.

Results

When the connection is made there is no tone. When the connection is disconnected the tone sounds. The frequency and power draw vary when the earphone is attached or unattached. The resistor affects the frequency and power draw.

Resistor Ω	Earphone	Connection	Frequency Hz	Current µA
100k	❌	❌	267	888
100k	❌	✅		14.9
100k	✅	❌	95	1,246
100k	✅	✅		14.9
470k	❌	❌	1,100	20.5
470k	❌	✅		3.3
470k	✅	❌	777	72.5
470k	✅	✅		3.2

Scans

• Maxitronix-30in1-16-instructions.jpg
• Maxitronix-30in1-16-schematic.jpg
• Maxitronix-30in1-16-wiring.jpg

Maxitronix-30in1-16-instructions.jpg

Maxitronix-30in1-16-schematic.jpg

Maxitronix-30in1-16-wiring.jpg