Some funny technical, R/C, 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

February 29 2012. To finally come to shot to present some new projects here I will make it brief, with more images
and perhaps some short videos than a lot of text. As one use to say "a picture says more than a thousand words"! :-)
Please look back!

• An awesome partly home built Linsley Hood class A transistor amplifier (2 x 10 W) with very well sounding Swedish Chorus Delta concrete speakers (2 x 50 W)

• Demo of a very nice old and funny Land Jump 1:8 R/C car with a Maxon Motor (24 V, 60 W, 8200 rpm) and a top speed of about 16 km/h

• Demo of a simple "inverted pendulum" controlled with a Jrk 12v12 PID-regulator circuit with built in motor controller

• Demo of a small and very good (7 - 250 fps, 10+ W) LED stroboscope (schematics by Elektor.com July 2012) "freezing" the rotation of a small fan

• Demo of an awesome (up to 500 fps) old TYPE MSX-1A professional flash lamp stroboscope "freezing" the rotation of a small fan

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

• Demo of a nice PMI Kollmorgen ServoDisc DC motor (12.6 V, 101 W, 3000 rpm) with a PWM driver (40 V, 10 A, 18 kHz)

• Demo of a nice geared Faulhaber DC servo motor (24 V, 220 W, 6700/155 rpm) with a PWM driver (40 V, 10 A, 18 kHz)

• Demo of a nice geared brushless Maxon servo motor (48 V, 120 W, 7560/1744 rpm) with a STK6105 DC 3-phase motor driver (42 V, 5 A)

• Demo of a big heavy duty (15 kg) Neco/Stohne DC motor (24 V, 750 W, 2000 rpm) with a home built PWM controller and power supply