--Message-Boundary-11782 Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT Content-description: Mail message body A lateral thought solution. Since this is the PICLIST and the application will no doubt have a PIC in it, I've taken the liberty of using one with a comparator. Since it had to be there anyway, there's no cost to the power supply. Same with the LED and its resistor. They were there already. The LED and additional diode make a simple voltage reference and also enough voltage to get the PIC started. The PIC wiggles the port pin as long as the comparator says it wants more voltage. Cost 91 units. For low power applications you could probably remove the diode and inductor and just use a resistor, topping up the capacitor as needed. (Cost 41 units). I have no idea if it would work or not. Steve. ====================================================== Steve Baldwin Electronic Product Design TLA Microsystems Ltd Microcontroller Specialists PO Box 15-680, New Lynn http://www.tla.co.nz Auckland, New Zealand ph +64 9 820-2221 email: steveb@tla.co.nz fax +64 9 820-1929 ====================================================== --Message-Boundary-11782 Content-type: text/plain; charset=US-ASCII Content-disposition: inline Content-description: Attachment information. The following section of this message contains a file attachment prepared for transmission using the Internet MIME message format. If you are using Pegasus Mail, or any another MIME-compliant system, you should be able to save it or view it from within your mailer. If you cannot, please ask your system administrator for assistance. ---- File information ----------- File: psu.gif Date: 22 Aug 2001, 11:37 Size: 6497 bytes. 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