--0-572428310-1158731624=:24586 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit Content-Id: Content-Disposition: inline In that case use this and run the schematic using LTSpice. Play around with the voltage. John PS: To learn more you have to understand each component better. From the BJT to zener. It is like reading what they like and don like. Each component behave differently under different circumstance. OPAMP reading is also a must. --- Sean Breheny wrote: > Thank you, John, but I'm doing this more to learn > about the design of > regulators than just to get a power supply. > > Sean > > > On 9/19/06, John Chung wrote: > > Sean, > > > > I found that LM 1117 works well for me. I had > no > > problems so far on my side with the regulator. The > > list did mention some other regulator but I can't > > remember the name. Try to check the archive for LM > > 1117 and you would see some pretty interesting > > suggestion. > > > > John > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --0-572428310-1158731624=:24586 Content-Type: application/octet-stream; name="stable voltage regulator.asc" Content-Transfer-Encoding: base64 Content-Description: 1948819820-stable voltage regulator.asc Content-Disposition: attachment; filename="stable voltage regulator.asc" VmVyc2lvbiA0DQpTSEVFVCAxIDkzMiA2ODANCldJUkUgLTE0NCA0NDggLTE0 NCAyMDgNCldJUkUgLTMyIDI3MiAtMzIgMTc2DQpXSVJFIDQ4IDE3NiAtMzIg MTc2DQpXSVJFIDQ4IDIwOCAtMTQ0IDIwOA0KV0lSRSA4MCAxNjAgODAgNDgN CldJUkUgMTc2IDQ4IDgwIDQ4DQpXSVJFIDQ4MCAtMTYwIDI3MiAtMTYwDQpX SVJFIDQ4MCAtNDggNDgwIC0xNjANCldJUkUgNDk2IDE5MiAxMTIgMTkyDQpX SVJFIDUxMiAtMTYwIDQ4MCAtMTYwDQpXSVJFIDU2MCAtNDggNTYwIC05Ng0K V0lSRSA1NjAgMzIgNTYwIC00OA0KV0lSRSA1NjAgMTQ0IDU2MCAzMg0KV0lS RSA1NjAgNTYwIDU2MCAyNDANCldJUkUgNjQwIDI3MiAtMzIgMjcyDQpXSVJF IDY0MCAyNzIgNjQwIDMyDQpXSVJFIDgwMCAtMTYwIDYwOCAtMTYwDQpXSVJF IDgwMCA0NDggLTE0NCA0NDgNCldJUkUgODAwIDQ0OCA4MDAgLTE2MA0KV0lS RSA4NjQgLTE2MCA4MDAgLTE2MA0KRkxBRyAxNzYgMTI4IDANCkZMQUcgODAg MjI0IDANCkZMQUcgNTYwIDU2MCAwDQpGTEFHIDYyNCAtNDggMA0KRkxBRyAy NzIgLTgwIDANCkZMQUcgODY0IC04MCAwDQpGTEFHIDc2OCAzMiAwDQpTWU1C T0wgTWlzY1xcYmF0dGVyeSAxNzYgMzIgUjANCldJTkRPVyAxMjMgMCAwIExl ZnQgMA0KV0lORE9XIDM5IDAgMCBMZWZ0IDANClNZTUFUVFIgSW5zdE5hbWUg VjENClNZTUFUVFIgVmFsdWUgMTAwDQpTWU1CT0wgT3BhbXBzXFxMVDEwNzkg ODAgMTI4IFIwDQpTWU1BVFRSIEluc3ROYW1lIFUxDQpTWU1CT0wgbnBuIDQ5 NiAxNDQgUjANClNZTUFUVFIgSW5zdE5hbWUgUTENClNZTUJPTCBucG4gNTEy IC05NiBSMjcwDQpTWU1BVFRSIEluc3ROYW1lIFEyDQpTWU1CT0wgemVuZXIg NjI0IC02NCBSOTANCldJTkRPVyAwIDAgMzIgVkJvdHRvbSAwDQpXSU5ET1cg MyAzMiAzMiBWVG9wIDANClNZTUFUVFIgSW5zdE5hbWUgRDENClNZTUFUVFIg VmFsdWUgQlpYODRDNlYyTA0KU1lNQVRUUiBEZXNjcmlwdGlvbiBEaW9kZQ0K U1lNQVRUUiBUeXBlIGRpb2RlDQpTWU1CT0wgcmVzIDU3NiAtNjQgUjkwDQpX SU5ET1cgMCAwIDU2IFZCb3R0b20gMA0KV0lORE9XIDMgMzIgNTYgVlRvcCAw DQpTWU1BVFRSIEluc3ROYW1lIFIxDQpTWU1BVFRSIFZhbHVlIDEwMDANClNZ TUJPTCBNaXNjXFxiYXR0ZXJ5IDI3MiAtMTc2IFIwDQpXSU5ET1cgMTIzIDAg MCBMZWZ0IDANCldJTkRPVyAzOSAwIDAgTGVmdCAwDQpTWU1BVFRSIEluc3RO YW1lIFYyDQpTWU1BVFRSIFZhbHVlIDMwDQpTWU1CT0wgcmVzIDg0OCAtMTc2 IFIwDQpTWU1BVFRSIEluc3ROYW1lIFIyDQpTWU1BVFRSIFZhbHVlIDIwDQpT WU1CT0wgcmVzIDY1NiAxNiBSOTANCldJTkRPVyAwIDAgNTYgVkJvdHRvbSAw DQpXSU5ET1cgMyAzMiA1NiBWVG9wIDANClNZTUFUVFIgSW5zdE5hbWUgUjMN ClNZTUFUVFIgVmFsdWUgMTAwMA0KU1lNQk9MIGRpb2RlIDY0MCA0OCBSMjcw DQpXSU5ET1cgMCAzMiAzMiBWVG9wIDANCldJTkRPVyAzIDAgMzIgVkJvdHRv bSAwDQpTWU1BVFRSIEluc3ROYW1lIEQyDQpTWU1BVFRSIFZhbHVlIDFONDE0 OA0KU1lNQk9MIHplbmVyIDc2OCAxNiBSOTANCldJTkRPVyAwIDAgMzIgVkJv dHRvbSAwDQpXSU5ET1cgMyAzMiAzMiBWVG9wIDANClNZTUFUVFIgSW5zdE5h bWUgRDMNClNZTUFUVFIgVmFsdWUgMU43NTANClNZTUFUVFIgRGVzY3JpcHRp b24gRGlvZGUNClNZTUFUVFIgVHlwZSBkaW9kZQ0KVEVYVCAtMTc4IDUwNiBM ZWZ0IDAgIS5vcA0K --0-572428310-1158731624=:24586 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 --0-572428310-1158731624=:24586--