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Summary of change:
For ALS operation/config settings, see * [http://vems.hu/vt/help VemsTune help] ** and/or old MembersPage/GaborRacz/NewAlsLaunchAndOthers page Some installers use trunk-opener '''"throttle kicker"''' solenoids (often from VW vans), notably those with 10..30A supply current overheat if operated for longer than a few seconds (say >5 seconds each time, without a similarly long cooling period). Eg an installed solenoid worked for years, with most rally drivers on most rally tracks, * but overheated on a track where the driver drove with ALS throttle kicker solenoid almost continuously powered * a simple PWM-ing circuit solved the problem, that kicks full voltage for appr 150..250 msec than applies PWM-ing for the remaining of the activation. ---- '''kicker of the throttle kicker solenoid''' * ALS throttle kicker with powerful N-FET (0.003 Ohm <= Rdson <= 0.009 Ohm) ** external flyback applied to the throttle kicker (eg. 4, or min 3 BY399 in parallel). The common cathode must be connected to the +12V of the solenoid (the common anode to the NFET drain). * NFET gate switched via 12V NE555 circuit and 6k8 series resistor * stepper ALS throttle kicker output (stepper output is also 0/12V) and a simple dual diode and RC(=68k*10uF) circuit
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