On Wed, 4 Jun 2014 18:04:11 +0000 (UTC), Cydrome Leader
wrote:
In sci.electronics.basics Jim Thompson wrote:
Anyone make an off-the-shelf timer that I can trigger and it'll run
for X-hours then operate a relay?
Or do I have to roll my own?
You can buy them. I'd start with Panasonic- they're cheaper than omron,
and usually less complex to deal with.
their support is complete garbage though, not that you'd need it for a
timer. Keep in mind that programming the digitals ones can be infuriating
and involves map folded, poorly translated, japanese sofware logic with
bonus 7 other irrelevant dead languages datasheets.
here's the start page
http://pewa.panasonic.com/automation-controls/timers/
If accuracy is not critical, the versions with dial are easy.
these things tend to be cheapest off ebay of all places. Grainger will
take you for a serious ride if you go that route.
Everyone is missing that key word "trigger". I need to hit it with a
pulse and have it run for X-hours, then reset... and wait for the next
trigger.... maybe just a pile of 74HC283's
...Jim Thompson
--
| James E.Thompson | mens |
| Analog Innovations | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| San Tan Valley, AZ 85142 Skype: skypeanalog | |
| Voice
480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at
http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.