Olin Lathrop wrote: >>> I like to decorate my home as well as >>> garden with LEDs :-) I guess I need not lees than 4000 LEDs to do >>> this. >>> =20 > > Are you prepared for the cost? For outdoor use you probably want one of = the > larger LED packages, like T1-3/4. Have you looked up how much a whole re= els > of those cost? How distributed do these need to be? Do you expect to > control each LED individually? Are the LEDs going to be arranged mostly = in > grids, or each placed independently of others? > > Have you even thought about the power requirements and distribution? At > roughly 20mA x 2.2V =3D 44mW per LED, x 4000 =3D 176W, and that's just to= the > LEDs without any loss or overhead. At the native LED voltage, that's 80A= .. > =20 The OP's 4000 LED is not out of the question. The DIY Christmas lights=20 guys are doing this already. David... --=20 ___________________________________________ David Duffy Audio Visual Devices P/L Unit 8, 10 Hook St, Capalaba 4157 Australia Ph: +61 7 38235717 Fax: +61 7 38234717 Our Web Site: www.audiovisualdevices.com.au ___________________________________________ --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .