This is a multi-part message in MIME format. ------=_NextPart_000_0209_01C566CC.6305E760 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit > > Me too - it was just one of those serendipity things. I was channel > > surfing and saw a few seconds of table tennis on ESPN and a light > > bulb lit up > > Joe, how are you getting the ball bearing inside the ping pong ball? > > Inquiring minds.... Well, after I cut the ping pong ball in half it's a struggle but I manage ;-) One thing I found - if you get the magnet pole exactly lined up with the UGN3503 sweet spot, whoo smokey it's sensitive. +/- 50mV AC o/p when the b-b wobbles barely 1mm, +200mV -400mV with a good shove, using a TLC271 with gain of ~7. I think this really is a good tremble switch. Magnet is a 5mm x 5mm x 1mm piece of strong stuff from an HDD voice coil actuator (er, used !!). It's epoxied on edge, which seems to concentrate the flux without excessively attracting the b-b and stopping it wobbling ------=_NextPart_000_0209_01C566CC.6305E760 Content-Type: image/gif; name="proto_sm.gif" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="proto_sm.gif" R0lGODlhZACeALMAADk0LnJcRpV1RZt6aaqWUrSfbLusisK3seTCgN/IpuLAy+rh3Pjj+f30+Pv/ 9////ywAAAAAZACeAEAE/vDJSau9OOvNu7eDkiCkURBFAKxs666OQZZFAiBFfhI8ryMBXAEnnBkT hY8HkCAICoKBQGBgqQLYbLZlAywkAIPKqi2zxNMpYBucEZQdwCHKG9gH4/FrpTdrrS16VlFSd09p UwQGb3AbYYQDBQZ2UVOFeFh3hYicaZhaaViITlIBnmVIjY4FdjtOTomwaTyetJ2WngKmYn8uV0wA rCg5i6oaYZHDJ5eUsbacdgQDsgLSdZrV1dKQm5W6eAOTxhkArTko0lI+r+g9JNnpmtE7TyTWPfh3 67ThKAPjGOQYuIXokiQEmgwYOMCwoQKGCiJKPPCQocIBCRb1YCVP0zBG/gArBDChQ5KnaSei1JCU IIGCheECHFijZQCABxQlLtApAAfJE+eoPUkBMuSEABklKSzJVIgyAiQSQMwZcecCqwp2MlBARRLT alDyVYvk1ajZs2jTql3LVu1OEwrjyp2r8EDdhhbtLjyAYK8BqX+lCmbYYG05LOXWKGaBc6EkvQoV xS1g9zFkigszW5RKsfPDiAdailgQWoREiQk8DEGQVCEhmosRq3jgQKbec0zlMpREFi5dvFMbIggd 2mVWEcVdGgCYKKWUKFmeCwDgAIHp0H8XNBATKVyOAzaxHFgQ/k+MjA6lgv68syXxttrQlexONhxf GX1HCG7JH7uI/fwF/ijggAgoQ9I0Q+HBVhglPYMLQaZEEtiAIpgwyoW6zNaWKgCkA8U021yx4Vrg 0bXUgfFg0w5THF0UV0J2TCLjAMB5NpFEaiFVElgD8UFTGbKtgIQPQBUQCJBbCFlSFUkugN9yackx lCmWIPYjklbYtMICLOCRGJKIaQkFIkZe9Epf/0SpQCutjAXmmxmC8iaY3UwhyjQBDOAAMGoFA1Y+ pETjjSXxkFLQSYNW8gmS5cniBBQ5RtMDiIk0o5Iwy7AS1jTqBOrNJZZgw0mepE633E1RHpDnDsI4 cxI+8flAlldAaZMppijB0kOozaAgQJ9hBcWqrmMayM0dSsVlF2QX/g2hjA7dNVgNFjmkFuWJOgjl TAJP0HgVaQwxcCViOK134wALsMgOUPNEkmNfuDX4rHzk3SWjiQqtp9VxSsHrE1PpEMKKWj0dRCuL QD1bZF9wiSYRTH8Rk6wJ/yK8VIMjZqzxxh5chZxSDf0F0XClBbjXVAZ8WxjHYAQQFql2rPAAjSfi S0xeJ9fY2VTrUcRfRS7lxNkBxtSDwAPjWtnCAzJNxmw4cuUg4cR+1fiQejv3jDVqqEH5wVADUZIJ mDc11ECJjmm65MWUOTQeuMBtnZPQrBlnVbpnuczDIpt0Kk0ABGTknlTDieaeQoIt4IADFjBAWwMt LeASYAICnVUY/jOhapg+6nZiSkaI52XdeglIHpGAxAU9nqrTUOzTCAOZUocTVcCXrYfU2CLqLWOw 7PvvwAf/u9DFHYFfCZAZUYIMzCtfAsNxwV43azMMaHgqaWGE7d4EzKYYlkhTd/AJXSD95k0qNHEm YlAdkUSUTp5jqyk3Jb1F+JN8Aov3i5qnQgrZMNKPmLCaophFDi5bRjoSYz6yha98WWlg/cpjhvAJ ww5XyMIicoCDPg1kUncg1/fGVT8ATGeA9zsMlmqzBksBLk+0oNivUpWMglDwD7/4XpyuRAbZ+DA6 CNKFEO00hRzMEC1Sig82SlWKTIBDTlSakymmGJ1EdeIO9fNg/qw4pSjpJIoZuXgQdDJkAAUsLgXf 8+EE7fSoAGgRVs/wYhit0Tc5eu4TacwDYhgwEhDtKkf5k5rUQuWr5uyqTbfYRjNUYIhSEAJmeLjI c6QBqWupBB1BNAQdnjEpWTmIDl3UJKIoUSboHKYcwGoOuyqhSFbqiiCOSoc1tBGrWF6DlshKExLn AStXOWNH7eOW56ZQgkIozBVbFNQldXmWMAAOYLSA4zBcc42OaEJTZGkfR7ZJqV6aUkGWrOWzWuED HBBJQjo7zc4gAxVWSQ1ZcaTkEZtZGUG+gpaXyshIFrITiTRgDzc5DWgaMgAh7KiIggSKOK7FlCDO gh1cKgMe/lJgg0XZBCdUESiNzLkigVEBAApwGTPNMpIl+SpFDXKAAAYaMmYpK2unSRcChlIkYoQQ AUzI00iNQsCfuJMYPq3WQlQHnIEepypaoRlJ2LEO+VFSETsNCVIOcJAi3K6mH/GJQAV6NwY4aTJK GUJQiaQwEwCSbX1JKwmI8TyFEMGtayUCvOaS1iHo4CdBzRZWhcfXvvr1rxvKSgMawACvXmVuOfnW twDbCAWczS/4wlle1skZztSgM4Ip4+8A8QUJkOZk2NLNsiwSNbfmjCH7qVtLFoKcdXbWLKeCTUdu olS2RQ0F+AKtzvBinKv5J0Cm2VpIVNg7H8mMVrYNq8Um/iPa0eLsP6UxKnQnN9CjbaB6SRlCAjIo iF8sB2oWYQVeI0FVuoT1MssCreAaAqDS3WhyDPnaE+JCKvotZoA7IVqeLoYtCU0CqJSZi152+5// UFc0iZVIVDvALkpsYop4fIB7CNOA/eJVKfYJaRi22xfFOKAlhStNRrfqkvx6LSSzG2YidLGdGfjs dDlxHGnyIAeLwuYBExkaRb41uZ8ZKUcJ01TAyEmFtPaHP9NTreBGQL0CDyh1T96uhLAQF4IBbprz CRiVTVs4/VRWBnjxrcPc09qh5o9vcFmSXTKiOZ56hx2iRIQoisw8kYVZxAx5XukGEotuDTEUbuRY Sas5/kmCXMhRh5IOuRgbEFshaEWw6IaVGJ2WKbaZ0pjOtKYxHZr29Nh6TK5qVKgHYiVT6MgTKY7P CLS8E8NWBNiVARSYfIRS102szovKanIt6+M96XjOex9aQlBnC42pfnQqYQwopoMu+AIQeijQ3nJt BGGfRXtx6UGPeoglJWEVp16wH2IaQAACjgmnVnJfjuLHt6HoAtkOXAEAs5GGLYlbBaoKhh+N9Ada G5Cn6XJQCvpANhYgoYV80BLS+pfCGoOShzFYa5+4pQgoaEoxDQTfGhQgswM4bjEzOd8YEhBE7nph 19Y+4BzQoagRnk9LmUPVCry08Hjn6RDhmflGJH6t/puHwkvw1nhieBikObFgU1v40zT/PVzwRGIs 1Rg60WFDEwyq8aL3vkkVLJUhKrSzBEwHyCOeLmcUAik2Rg/EfTNowkTZbyAefGY87CQKKdbd7nbf 3SlMwZs35uM5eJ9TnAIvDxtGgU+X5ilRJLU/KgmxvoaGUBmGSCUHWxMPurABFt4ojHuKsYqRF+Mj F0WTP3Nije9+uhbJOUtcAN6LHUm0nOn+CydifmwLuLlNoAB3GppDHbjQlqBAaMwwElEm+22JuBXj 9EL0HokfmhWlCn+swnPdihkCL8dJqAKOL8Mc8zzgJGjaqiI6mJJ+VOaKb6GONQBa5PoASyWHPUl8 /jiKFYTShh9lIUdmBOEbppdoQVAILgM41dAnnDMprlcpuwIP0URvusIMjQQJnjMmagAGpOF39hd8 vMIRoEQI9/BQnDKBH+gMUsAd0FFfidd05jAMsBSC7BAf+KR/Y0F8ogIinMIPjucEfeJ0WAWC1JAw ssJ6KeEK0ZBNszNkLWh4bbJ6V2Ur+MdL9rc3ClA9NYAAC2APG5gituRQlnAOOfIECuNg9AAPrlAA KpV/u7IrJ+AAU/h3zqCAMqiBWwgr3cEDOLBiKWJNy9AT0tYOH9Et0BIzA2FWljQr8cJU+OAs3JRL c5EsmuKHssIRpLQ7k1ZpfHZM9FBIUKEIgHNN/v61W6RFEhS3gZukK2swfh7EEXPXZ2RibHd1Wjxz I3hhAtwCMFvEfyewikGRSLbiGjGSM441WBPgAMeBWA2hVwljK1MIhgylV3TkETmwJpinGHfAcRIV UFQRZuiChB5YhzwASCzCK/BUA1SwY1lhNsRFLrO4HkhxTPcQTWERduPQNF4RTXWQLU/ALW4zWv90 dhhVEZ8RERiRiCkxCm7UIYGGFvtkAu2QSAoFRCZgF1xiXDCwVUeVVw2FQfMWfkaxTz/gkLVUEuhR IzDRHS4yHjEVEUjDF2e4iNuEFN3BixshMVe1CH9xF8ChLCeDkVdRkFh1VYAyMJVWMURyOxuR/lWs gY4QsVX99JRrogC0ojtkRSySQI/GoCNLAjA15VMooB4DWRVZ4TFZwQDgMQK5oTYJhSklkSOg4xvH xGyuw0FwMZZ3ozKkUZBLtSInoJE2uYuVdhscZFAH8RMG5VOEiVxphi3q0lQIg1uGOGzaEnqwBIHw MAv0Rpma6ZGb1pme+ZmgGZqiOZqk2TFetRsuFT2i1ZPacRWjeVikJYp+sVpx05RDsxfWgmkLsBVV kxl1UTUkwxdF1Vo2MmbEkTLAE18UADfo9Zs8OZHAWVTO1ZSoMWYp81pR8j35Mx1EgxNAtZjMtTYB NheD0VLTCWVi5h6MEyWMpAmkIj7MdRvN/kkSvjFgO2mfa7YzAKJqqLUQPNWS4VMO4RAOtKUsE/Od VAWJ3/lScbNeIMYZqaZqAYKdHIIJ1AFQZ7MsXpFmyIWIBtpcd4ZaOQYa/cRVAyV2Koh2syEA6SWY 4ila3/Gcsjg3YkYc6Xkd/MEBUKNaoXFD94VxA7YXUMOY0HKgdyVZwTGcweUepFEVU9EBxXYQJsR2 fKA0MVBeCxpavpFXAlYjvTWQ7cE17uWkH0AMsjJFJ/QCeaJ1TKMZkMEbJoCId0UzLVWSlSUYyCFQ xfEQ3xJBSiB/AxcKebQFH6YAMwM18+Ed3iEx3sGgJzMcAmmjn7E6XEOmqhAjmFAJyRYC/ul4FTJy M49YGXUxBtPhMpDDMxJqohHhVe4FHswBdWEUId9QDp8RIA6Qe0PKk5ShBws3c2vgAFMxYQBiGkhV HAsGBzolHXYEHSlTMkj2F4uzJnkyHocRM0kjBw0ANDa6WpMTYliYcgChU/uQO5wSAAMZIMRBPajl Wfmmpux4OlVxq6glnExaAzKTN0IGjtsAZp7BXkc2ODPqm1HRW8DFZAHiMmFQB2gBCe9ER0+1T26D NbXoXJ/WY8QKaweWHOBRUwgFrvVIU8mAjzESBUOjTkKDsYNjHcnhZflZET7zqUG2IhdxFoIYL3cI aGJVRrpRWcnhW6eDrlEhAy0RBVvqehtuoAs8AFIHhE0KNIJRxEbCylKkhl2+tbJDSyXDUAJ2omjT sSAHQ3Y6lQlx8g0s0WpyATsjMBVdJ3n36jsJRCTeEEXLKmdAQpmXyFgJJIR6RxCWRxBtC5o0BUcY kjuCuoKlyXcNcpDUoCGlqQSyw3KM27iSO7mUFgEAADs= ------=_NextPart_000_0209_01C566CC.6305E760 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist ------=_NextPart_000_0209_01C566CC.6305E760--