The basic principle to work with here is that of amplification. for a spider robot, you want the legs to emulate the motion of the fingers. So the primitive is (move and feel), amplify, (move and feel) make the loop You can probably get piezo electric effect and its converse to occur in a liquid but it will require: 1) a high voltage static electric field to align the dipoles OR 2) a high static magnetic field to align the dipoles 2) a liquid with a high polarizeability. modulation of the liquid will require a voltage to be superimposed on top of the high static voltage such that it does not disrupt the dipoles. This disruption of dipoles could be the performance limiting feature of liquid piezoelectric vessels. these limitations does not mean the phenom should not be pursued however, because everything worth doing has limitations. Collagen is piezoelectric. Water, Acetone and Acetonitrile are choices in order of toxicity and safety. water must be kept cool or the dipoles alignment breaks up. Gelatin may have a very high dipole moment. A gelatin poled "crystal" could be very useful. IGBT's are not strictly MOSFETS and are capable of higher power operation. IGBT's are ideal for your fluorescent light frequency converter. For generating high frequency AC, they are the part of choice. Ideally, you connect a signal generator to them, a power supply and a load. If the load is a fluorescent tube you can get rid of that annoying flicker. References http://www.physorg.com/news110191847.html http://usm.maine.edu/~newton/Chy251_253/Lectures/Solvents/Solvents.html Dipole moments http://en.wikipedia.org/wiki/Piezoelectricity http://www.braeg.de/e_s/3electronic_design/3_4_igbt_switch.htm H-Bridge http://www.braeg.de/e_s/index.html Electrodynamic scuplture. http://www.braeg.de/e_s/index.html has excellent comparative analysis. http://robotechno.us/high-current-h-bridge-with-mosfet.html http://www.cadvision.com/blanchas/hexfet/np-s.htm http://www.cadvision.com/blanchas/hexfet/ http://is.gd/3ZC4s Google mosfet query http://is.gd/3ZCaC HBridge discussion using opto isolators to enable 4 N devices. http://is.gd/3ZCfs High Power RF Mosfets from ST Microelectronics http://is.gd/3ZCIn Power Amplifier Discussion Including MOSFETs http://www.tubecad.com/2004/blog0006.htm MOSFETS vs tubes. http://is.gd/3ZCNN hBridge Circuit suitable for telescope. http://is.gd/3ZDAM PWM motor control with MOSFETS http://is.gd/3ZDPi ST Micro IGBT list great and small http://en.wikipedia.org/wiki/File:H_bridge_operating.svg wiki H-Bridge schematic http://www.falstad.com/circuit/e-index.html great circuit simulation index http://www.falstad.com/circuit/e-mosfetamp.html mosfet amplifier visual simulation http://www.falstad.com/circuit/e-phaseseq.html phase sequence generator - beauty http://is.gd/3ZEJm Mouser part to complete 4 http://www.educypedia.be/electronics/powercontrol.htm http://is.gd/3ZEUh International Rectifier drivers for bridges http://is.gd/3ZF6M ON semiconducter power electronics What I am wondering now, is because of the large current handling capability, if I couldn't create a velocity transformer out of a conductive solution of liquid, and switch a current in a liquid velocity transformer at very high rate to create a liquid compressor of sorts. So imagine your set of velocity transformers as a set of shaped tanks of saline and what would happen at the nexus point. instead of building the velocity amplifiers using electrodes at each end (they still may or may not consist of liquid), build "crystals" as cylinders of liquid, that work at low impedance compared to piezeo electrics MOSFET notes 1) high input impedance, low output impedance 2) ideal for motor control 3) useable for audio amplifiers 4) not ideal for ultrasonic amplifiers due to low output impedance 12 volt motor hand control to move left right --- alternate uses - antenna pointing, solar collector pointing stages 0) current rocker switch with heavy wire 1) small rocker switch with light wire 2) small rocker switch wireless 3) heavy wire, light wire, wireless on-off switch, speed control, graduated position control (dial to position), computer position control (slew to position and track) human over-ride always possible