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Groups > sci.electronics.components > #6372
| From | James Harris <james.harris.1@gmail.com> |
|---|---|
| Newsgroups | sci.electronics.components, sci.electronics.misc |
| Subject | Re: Power a test TTL circuit from USB? |
| Date | 2018-10-17 14:27 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <pq7dce$a9a$1@dont-email.me> (permalink) |
| References | <pq4nkr$6hc$1@dont-email.me> <Uoidnd-fU9FBslvGnZ2dnUU7-U-dnZ2d@supernews.com> |
Cross-posted to 2 groups.
On 16/10/2018 19:37, Phil Hobbs wrote: > On 10/16/18 9:04 AM, James Harris wrote: >> Having not touched any of this kind of stuff for years I'm looking to >> power a small TTL test circuit which I intend to built on a breadboard. >> I wondered if I could run it off USB power. In other words, is it >> feasible to power a TTL cct via a USB lead and USB socket? >> >> I found a "USB Mini B Breakout Board" >> >> http://www.hobbytronics.co.uk/cables-connectors/usb-connectors/usb-minib-breakout >> >> >> but I'm not sure that the PCB bit of it is necessary and, besides, it's >> only rated for 100mA (which may be enough but I can't be sure at this >> stage). If not USB, I guess I should go for a wall wart and a 7805. >> >> So the question is whether there's a good way to power a circuit via >> USB, or whether you think I should go down the wall-wart or some other >> route. >> >> Any suggestions? >> >> > > Sure, that'll work. But why on earth use TTL in 2018? TTL, 0.1" through-mounts, and and bipolar transistors are all I know. I told you I hadn't done this for years! What would you recommend 'these days'? -- James Harris
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Power a test TTL circuit from USB? James Harris <james.harris.1@gmail.com> - 2018-10-16 14:04 +0100
Re: Power a test TTL circuit from USB? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-16 14:37 -0400
Re: Power a test TTL circuit from USB? James Harris <james.harris.1@gmail.com> - 2018-10-17 14:27 +0100
Re: Power a test TTL circuit from USB? Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-17 10:19 -0400
Re: Power a test TTL circuit from USB? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-17 13:02 -0400
Re: Power a test TTL circuit from USB? not@telling.you.invalid (Computer Nerd Kev) - 2018-10-17 22:06 +0000
Re: Power a test TTL circuit from USB? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-18 20:58 -0400
Re: Power a test TTL circuit from USB? Jasen Betts <jasen@xnet.co.nz> - 2018-10-16 19:21 +0000
Re: Power a test TTL circuit from USB? James Harris <james.harris.1@gmail.com> - 2018-10-17 14:31 +0100
Re: Power a test TTL circuit from USB? not@telling.you.invalid (Computer Nerd Kev) - 2018-10-17 22:19 +0000
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