Some funny technical, audio, electric motor and electronics projects

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Mechanics and (non electrical) engines

• A beautiful Stuart 10V steam engine model driving a small generator and a lamp (latest major update: 2009-10-03)

Hi-Fi amplifiers, stereo and audio systems

• Some thoughts about home stereo systems (latest major update: 2009-06-22)

• An excellent "ready to run" Class-D amplifier (2 x 50 W rms) with switched power supply and a stereo setup (latest major update: 2009-07-04)

• A very good home-made Velleman K8060 discrete power amplifier (2 x 100 W rms) and a stereo setup (latest major update: 2007-08-10)

Brief demonstrations of some interesting electric motor projects New!

• Demonstration of a series wound DC motor (24 V, 746 W) and a Curtis 1204-102 motor speed controller (24 - 36 V, max 175 A) (latest major update: 2011-04-15) New!

Electro-mechanics, inverted pendulums, electric motors and controllers

• A very simple and cheap computer controlled "inverted pendulum" with PID-regulator software (latest major update: 2009-08-29)

• Digital PWM-drivers and PI-regulator software for electric DC motors (latest major update: 2008-11-12)

• Some power PWM-drivers for electric DC motors (latest major update: 2007-06-03)

Other electronics and power supplies

• Automatic charger and discharger for small lead accumulators (and Li-ion) (latest major update: 2010-02-02)

• Power supply 2 - 30 V (> 24 V at max 15 A) stabilized (latest major update: 2008-09-04)

• Power supply 13.8 V 4.4 A stabilized with over voltage protection (latest major update: 2008-06-23)

• An electronic tuning fork at A 440 Hz (latest major update: 2004-10-05)

• Two Sinus Generators (latest major update: 2004-01-25)

• A simple glow plug driver for model engines (latest major update: 1998-04-08)

To come

Note, at least the projects marked "to come soon" will come during H1 2012! As you perhaps have noticed I have
many small longtime projects going on in parallel. Some of them are only experimental and still under development.
So I apologize if it sometimes takes very long time before this web-page is updated with new stuff!

• Demonstration of a HTWay LEGO Mindstorms self balancing robot (all credits to LEGO and HiTechnic) To come soon!

• Demonstration of a simple "inverted pendulum" controlled with a Jrk 12v12 PID-regulator circuit with built in motor controller To come soon!

• Demonstration of an old and funny but not so fast Land Jumper 1:8 R/C-car with a brushed electric Maxon motor (60 W, 24 V) and two small lead accumulators (12 V, 1.2 Ah) To come soon!

• Demonstration of a NFO Sinus frequency converter (0.75 kW) and a nice two cylinder Thomas air compressor (0.55 kW, 7 bar ≈ 100 PSI)

• A simple "power converter" consisting of a NFO Sinus frequency converter (0.75 kW), an ABM three phase motor (0.75 kW, 1800 rpm at 60 Hz) and a car generator (12 V DC, 70 A)

• Demonstration of a geared brushless Maxon servo motor (48 V, 120 W) with a STK6105 DC 3-phase motor driver (42 V, 5 A)

• Demonstration of a very nice repaired German "Tante Paula" electric scooter with a brushless motor (24 V, 300 W)

• Demonstration of an electric bicycle with a Golden Motor brushless hub motor (750 W at 36 V)

• Demonstration of a very good (up to 500 fps) old Type MSX-1A professional Stroboscope "freezing" the rotation of a small fan

• Demonstration of lightning, heating a thin metal wire and light out an old very nice Swedish Sievert Bunsen burner

• Some experiments with a pendulum on a chart with a Jrk 12v12 PID motor controller and a potentiometer as angular actuator

• Some experiments with a simple Furuta pendulum with a Jrk 12v12 PID motor controller and a simple potentiometer as angular actuator