--Apple-Mail-4-697921661 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed Howdy, On May 26, 2006, at 4:52 AM, Olin Lathrop wrote: > Do you have reverse diodes accross the solenoids? Yup... They're definitely not frying because they work fine after I disconnect power to the solenoid and swap back to using the smaller solenoid. There seems to be something about the larger solenoid that causes the locking on behavior. After reading about IGBTs I tried one of those. It works perfectly, but despite what the data sheet says about the threshold voltage (3.5 - 5.75V) it actually turns on at 6V. I'm stuck with the 5V out of the PIC so I can't use the IGBT. I guess I should just try a MOSFET and see what happens. > What are the max collector current, max collector-emitter > voltage, and gain specs of your transistors? For the NEC part I believe it was 100V and 5Amps. Not sure about the gain specs. Will get back to you. > Also show your circuit. It's this (see gif) but with a snubber diode in parallel with the load and PIC on the other end of the 1K base resistor. +V is 50. --Apple-Mail-4-697921661 Content-Transfer-Encoding: base64 Content-Type: image/gif; x-unix-mode=0644; name="tranload.gif" Content-Disposition: inline; filename=tranload.gif R0lGODlh4AC1APMAAAAAABERESIiIjMzM0RERFVVVWZmZnd3d4iIiJmZmaqqqru7u8zMzN3d3e7u 7v///yH5BAUIAA8ALAAAAADfALUAAAT/8MlJq7046827/9SCHMgCnmiqrmzrvtwCzLMJ3/jjDAq1 97mgcEgrDo8pQoGSCDQooyhpKq1Sr9Ysdqvtcr/e8JdQpBHAaLE6/bV1FAHHhEColO/4vH7P7/v/ gIGCg4R/CBpAEwAJEg0AiUiRkh8IeIeTmA8NcRQFdQ9NmaKjFWRFn6RIm3ITCgBPSqmymAumAARu szcOCSMACAiMOgIJDgC5uslBlcjKLwcGBgDRlw8GBAoCzts5BwDcQasVMgIH4Octleg34hUCAAzr 8ife8y68FwrV9vwZ6v0AA06qJ7CgQRz/DipciIIgw4cQ/X2LSLHiA4cWM2YqxHGQxo8Z/26xWUOS DRmQKO2YQ4cxJchf6xK6fLnyXMuZGWGik4kzZ01wN3tS1HmOp9ChP7kFPfqQKDijTJsm3bY0qkKn 3KBavTr1AyshVbcWxEqBwYAnFRoUCDCjANoJZvcZEDCAroG3GLSKHdtVggy8mgLwcLBgQIB4E6QN oEBgADAEhgFXCLsXIFm4r0otnrBjwFcBZBA/iCXBgZKvFvRWttz3wd+yx8bB8wtvQE0CBii4ajaB 8mp7lyUwyDyhCephwgosRiCAFelGiyT+Xgig9esJCDi5M2eM0XAbuCk4EnbB9/R1wR8Mx+sK8KYe CW7RAbBkdH3h0fNOPM83w/VGAZAnwf8BTjygnAEHHEAAJ+FhVyAG5vEHTnrrTXbYBAsEsMR7E2zC yHMMBLBPavtJyJp/AAhAF11PFEAfAi4WIEd2FXhiWgAr0nfcZCWayE96Djz2GCsLGFCAAW4oAIl6 xegDTAKiSefjiSz1OKU86emi2pXbVLdOhFzOkuUsW4aZjJdVmjnPmLKUqaYsaNpk5ZvOsJmKm3SO EidQc+api52k4OknJnsq1eegqQA6iqCIRtLRo3806kxJYpBBaRqSZgRmplExyulRm34qlKei4hRq qRolZVRrqGYkQy4tMQPXWa1+RAcUPd4Cm2T+MGDAkik0kFutQrzaW4ne5PLfBqaNNqL/CgYISOwN t0ogk667egDMaIw4oIABCDzhLQOHOJAgA0AUWYxwqEx7g7EX7SdrCMRxIAAshxgwQAIGOJFhAHeB tlYADzD3rWcS0OouDtUmhG22pe0InQQEFHOAuIdVyJy1cQhgw74S/LowDsYSlKwF1zFHV5TCEeys eka+s0CGEhzZ8nAqDoBmgiMzXMc/D2cLmRwJNFdBiBQnsAkCDDiQscs2u3ZYAAswYDVa0fb87jH1 zCtbAw4IgBgvxxkjBwFMF7gbzQ/AIcdaDxATmA0F8Ka1CnSoE/Su7WQwQDwFfKgiAaAxoE3IKS7o mooilqbw3S7IQMbJFwTpgNNfKSCZ/wJJNSAuXuh6ng1cXy1wH+Qu2NKu35c4LdkOEqMcAAkBYlA3 6jDIUEMHIQbjGAZVe7BAgnbjgzsMZKyuQQPEH28Q5c6nRGr0zx9KPUXTXx/QqdoHlH33/HAPPj+r FlGTNzScb/6x6bM/g/rtD7i+/M+CL/7483yP/5fW72+Q/iqwm/9acL8AKmqA2upfEEwhQAQ2RIE4 QN/eHLgCAKYAghT0QAFVgMEMcsCCKOigBzVAmcvlQIQj1A8GgsSWABCAVxxMIQH71C8oKaAusQuh DFkAleGIZhPDcgEKd0iBoCinAgqQ1gqGSERrzakcR2BiE2/iNFa1QIr7E0FrjBK2IP/6RYkxbOJF bGEJ9V1gLqhpDAyw6DwJnmEENpCCGUQwJ0dUwxXACuMIK3GL+lmAAQqigX5wY6kbsPFu6LMi8JLH m+EV4AAN1GEGk7cCGQQykjg4pJkWoCQFLACGF6hFbAwYxwkSoWdkYEtbcogh+cxPeKOkjfKEoMkw NahgsQSeriSoKBmwzDWmPCEq7+M0P8rSifGLQS7pNctMojKIrvglY1DBS2PSq4GWREItuWQKVZ7O AmRwAx/fp0xMwouWqOSBkrIDxnjBqgjWBKY0L3CSU47slgZCmAX2Ns5CyQaTFPDnGofZiVlCT340 MKYvTwDCC2zzSnToZHbqN8F+9uX/nCAQqBBR2cIUdeWgCJ1B/TAKgobaASIjSSlJclCtClgUZcs8 gUZZ8NA7QaoQSfFGPEPyUXjKZp4fCCYLFGmPDV5wRKKcqX5489JWAnQDRtWISYPalaTu9FgQ8ilt nroBkqJkeCWAak09kJ6kEjU4TfXqEq8KETI204mkUKprTGFFjVZTnpkkagYYgIwG5HEWOj1mVuN6 VbOGxI/9LEFMr8jWvGiHYm9N1D7Uisu46nWuInVoX3gZzgVGlgMNEEAiPDShpPQhrjclRGNBsEFP FOexdRqRSLJQT1HMdiS2yMJtq0DG3eUAgHBAy3O2MYB21dYCUZUpWw3rUD/y8pIn/7zsCmvniL/O Qnck0JkAp0pWRTIXAxpN7GgWu1YXuLZolWOlJJKKCxKOtQNZ+u5hsxq/zq5RusBzQtSgkDPAASAA AF7tJLgL34uagq0tdalWx8vVDRxwugRCxtBA0ZyKzSO5GX2WfDmwlOcyhrwl3aZiKhC2sRXDwvLo Z2r/oKrMhrAr4v1wgy9QXBgMp3OwHY1gVnYOsKr0x11oBn4DatBXzgHEBUYC5lphGgRcTr2ZgkqM S4Fk9wIVBr/TgRNQPLJs8iiZVJ4xZCXRuwTYxj6Pse6njotMF9OzyjAVc7DOJQEnAUPNqzELKDmA FQ9nwL6uiaRQ91chFcRqwRjorP8MrAlSBy4rhO3yswbCaQoUfRZ/hTYgKqY86SLYbdAbLdWjUQAv SXc6oW92FKoyvYLOcjrRdwAnnK+Iqte4CMAyQoGlTP3mO+QC0FFcdWYsbBovfgB9UrjyRVSsE93J WZKieg2Ko6FpMYO1Bt64tCGFDYsdPygFomzvBWeg7W2XynLOupyCWhBu6Urw2UucFooXcLgZkts6 45xPXOVdAGAMwNgsGF5v8YA2+e2bWHaGN1S1IOH38lmMD6xcJydubohTYk6666jRXuBwlzCtBb8y iwMMAOUVBIXVzsxTs1qANqRlbQhQGfVA87Qtbx1gXXwdQQMAKQybhytpNGNAuVP/cPJ6CTNP9zLQ GX5HOM5pKBv5cky/8IW0BzzutxifQUcBHm86iYNqmuhBwTcRDxhdBGPxqBjbRAaWOQ0nARNXdkbz VPXs2AZfgXkCNFyjIJk5q+rggnnW90xTurvscgpQjmkYsQm930VETbuQ2l1GgiEUnfBdf9MqGq+e OIy9QDAK0RN283eoKVwDMf/FxBVQcvj66W/WwFEAxM74pCMgN4QDDWgMBKXDXT2Cbgfwf//7bVrn iXOlkbtw5OAAyZjuCAR+uMr1CYPbWb7jGsD+V5XvAb8iIfoOtjhrtQ9e8V/84JEI0gGAgIDVtX9a GA6qJHYgABcdYqGlEQDXPwV+rOBVovJHYGZyQHajURM+BH/kJxvkdARnJgFywxysMBfu0n+DpGSi NQe5cYBhI2B0En8eIG5D4DSJ0CD/BkyYhyjhdnroMHsYaC3asG7EomJDZg8NGDeX4AiF0U6Zojtl oIJZ8QlOIxoDEBkXcClGCGRIeIRKOAUD10dJ+IRLGAW8ETa4oX9MEEwrloVauIVc2IWC0BfM028k 9nHEwoOeZn7c0FtDh4aToDqVEQEAOw== --Apple-Mail-4-697921661 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --Apple-Mail-4-697921661--