Yep, same here. I had the same problem for a while and didn't really have the time to follow it up so I changed back to receiving single emails. If you find a solution let us know. Regards Stuart O'Reilly 11/18/01 5:28:40 AM, dave wrote: >In message <1005974601.2015972.0@cherry.ease.lsoft.com>, Automatic >digest processor expounds >>Date: Sat, 17 Nov 2001 00:12:35 -0500 >>Reply-To: pic microcontroller discussion list >>Sender: pic microcontroller discussion list >>From: Automatic digest processor >>Subject: PICLIST Digest - 15 Nov 2001 to 16 Nov 2001 (#2001-326) >>To: Recipients of PICLIST digests >> >>There are 102 messages totalling 4029 lines in this issue. >> >>Topics of the day: >> >> 1. [EE]: high-power generator/motor (9) >> 2. [OT]: Making printed circuit boards with lazer printer (7) >> 3. [EE]: RS423 vs RS232 (2) >> 4. [EE]:Re: EGA to VGA converter (2) >> 5. [OT]: Making printed circuit boards with lazer printer (2) >> 6. [OT]: New type of Engineering degree >> 7. [OT]: Dallas iButton (6) >> 8. [PIC]: adresh&adresl registers. (2) >> 9. [EE]: Modular enclosures (5) >> 10. [EE]: CMOS transistor level design (2) >> 11. [pic] programming 12c508 with 16f84 programmer >> 12. [PIC]: 12C509A web server ???????????? (5) >> 13. [OT]: Help with FM transmitter (4) >> 14. [PIC]: Schmitt input problem 16F628? (2) >> 15. [PIC]: Noisy relay switching in pic applications >> 16. [EE]: Light Sensors (8) >> 17. [PIC]Does anyone know of some logic circuits that would detect the >> following situation? (3) >> 18. [EE]Does anyone know of some logic circuits that would detect >> the following situation? >> 19. [PIC]:Does anyone know of some logic circuits that would detect >> the following situation? >> 20. [OT]:Refilling HP smart cartridges - The Answer! (2) >> 21. [PIC]Does anyone know of some logic circuits that would detect >> the following situation? (2) >> 22. [PIC]:Does anyone know of some logic circuits that would dete ct >> the following situation? >> 23. [EE]Does anyone know of some logic circuits that would detect the >> following situation? >> 24. [EE] AD7829 problems >> 25. [PIC]Does anyone know of some logic circuits that would >> detect the following situation? >> 26. [PIC]: tristating i/o pins (3) >> 27. [OT]: Battery Corrosion and How to Get Rid of it? (2) >> 28. [OT]:Refilling HP smart cartridges (2) >> 29. [PIC]: Simple Question on driving 7 segment display with PIC (2) >> 30. [EE]: Any PLDs or PALs that don't guzzle current? (5) >> 31. [PIC] Lowest power consumption >> 32. [PIC]: First program, very odd results... >> 33. [PIC]: Lookup Table Troubles >> 34. [OT]: Leonid Meteors (2) >> 35. [PIC]: Lookup Table Troubles -- More Details >> 36. [OT]: Newfound electronics (4) >> 37. [PIC]: Need help from an EPIC+ user (3) >> 38. [EE]: How to amplify a phase difference ? >> 39. [EE]: Does anyone have a circuit to power a PIC >> 40. [EE]: Bulb Life >> >>-- >>http://www.piclist.com hint: To leave the PICList >>mailto:piclist-unsubscribe-request@mitvma.mit.edu >> >> >>Date: Thu, 15 Nov 2001 21:02:05 -0800 >>From: Lawrence Glaister >>Subject: Re: [EE]: high-power generator/motor >>MIME-Version: 1.0 >>Content-Type: text/plain >>Content-Transfer-Encoding: 7BIT >> >>Sounds like fun... it seems from my experience that you will have some >>difficulty finding a generator for 20amps that is relatively small. I am >>thinking that you may be able to use a small car alternator to generate >>the DC you require. Since you have a PIC involved, perhaps you could >>drive the alternator phases (A/C) and use the alternator like a 3 phase >>motor for starting your gas engine.Once the engine is running, you can >>switch the alternator into generation mode. The rpm ranges for the >>motor and alternator are close, I would start with a 2-1 reduction >>between the motor and the alternator. You will probably have to do some >>bench work to see if the aternator has enough low end torque to start >>the r/c engine. Keep us informed of your project... I would love a >>similar unit to keep my ham shack battery charged during power outages. >>cheers >> >>On Thu, 2001-11-15 at 14:18, Andy Meng wrote: >>> Hello, >>> >>> I am making a generator for a large radio-controlled vehicle. The >>purpose >>> will be to keep the main 12V batteries (about 30Ah worth) charged. The >>> engine I am using is a 4-cycle R/C aircraft engine, about 1HP (.61 >>in^3 >>> displacement). The engine will be coupled to the generator, which will >>then >>> be controlled by a PIC. >>> >>> The generator also needs to be able to start the engine by acting like >>a >>> motor. The engine speed will be controlled by the PIC by means of a >>servo, >>> with the PIC adjusting the speed for a certain voltage output from the >>> generator. However, I don't know which type of motor/generator would >>be best >>> suited for this purpose. Since everything is DC, I assume it would be >>easier >>> to use a DC (permantent magnet) motor/gen. Efficiency isn't really >>> important, since the project is mainly for fun. I think 20 amps from a >>> generator (only about 250W, with about a 750W input) would be about >>right, >>> but it has to be about 14V output (to charge up the sealed lead-acid >>battery >>> bank), and turn with a good amount of torque (current is mostly >>> insignificant on engine start-up) to start the engine (with 12-13V >>input). >>> If anyone has ideas on what type of motor/gen to use, I would really >>> appreciate it. >>> >>> Thanks, >>> >>> Andy Meng >>> N8MX >>> www.qsl.net/n8mx >>> >> >>===================================================================== >>Lawrence Glaister VE7IT mailto:ve7it@shaw.ca >>1462 Madrona Drive http://jfm.bc.ca/ >>Nanoose Bay, B.C. http://members.home.com/cncstuff >>Canada V9P 9C9 http://gspy.sourceforge.net >>===================================================================== >> >Ever since I signed up for the list (digest mode) I have only been >getting 1 post each time - what's gives? >-- >dave@sinfin.demon.co.uk > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu