On Saturday 14 June 2003 23:45, Marc Nicholas scribbled: > Amen to that! > > *PLUS*...leaving them out is just plain *lazy* these days. The cost of > adding decoupling caps to a design is negligible...you can't argue you = did > it for cost reasons anymore. How about space reasons? I got away a bunch of times soldering the cap o= n the=20 underside of the board directly to the power pins, but now on one of my=20 boards, I have a sensor stuck under the board. The nearest free spot is = very=20 close to the 0.1uf output cap from the 7805, so I did not add the bypass = cap=20 in this case. > -marc > > On 14/6/03 21:48, "William Chops Westfield" wrote: > > I suspect that a lot of breadboarded circuits get away with no bypass= ing > > because they feature nice thick conductors leading to a low impedance > > power supply, as well as (frequently) realtively small (transistor co= unt) > > ICs switched at low speeds... What about the capacitance of those long breadboard power rails? I shoul= d go=20 measure the capacitance out of curiousity. > > That doesn't mean it's a good habit to leave them out. > > > > BillW > > > > -- > > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > Cheers, -Neil. -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu