You need to combine two timer circuits: an astable for blinking rate, and a monostable for brightnes/steadiness.
Astable should trigger the (retrigerable) monostable. Monostable should light LED.
By varying the frequency of astable, you adjust the blinking rate. If you adjust it very high, so...
It just struck me when I read electricuwe's post:
Maybe a tunnel-diode oscilator would be appropriate for that, as it normally works only at small voltage supplies? Search the web for "tunnel diode oscillator".
I agree with Lewish. There are good manufacturers in Bulgaria, as well as in Macedonia and Serbia, but if you are in North America, check Mexico (don't burn cerosine if you can use surface delivery ;-) ):
http://www.crito.uci.edu/git/publications/git-mex-rpt.html
http://www.world2mex.com/...
True, it does have over & under voltage and thermal shut down.
Never occured to me as a problem, but I suppose your solenoid must hold, no matter what happens to car electric supply rail.
I used it only to switch incadescent light, which is surely not a critical application. In my design it...
Instead of p-MOSFETS, you may want to try automotive high-side switch? It comes all-secured, with logic level command input and with error status output, so you can provide failure indication. I have used Infineon devices, but there are others', to.
I agree with JMarko, and you can even get by with just one Graetz and two diodes:
The Graetz is applied on one of the secondaries.
Two remaining secondaries are to be tied in series to form a-sort-of one secondary with middle out (observe the winding directions).
The middle gets tied...
To nbucska:
Actually, I don't. I just break outer glass bulb and expose inside tube which emits UV-only. I have heard that fluorescent rods (and complete bulbs) actually emit not only visible but also a portion of UV light, but I have no way to examine that. Do you know an inexpensive way to...
I didn't actually did this, but several friends of mine did:
Buy a plain white-light fluorescent "bulb" (i.e. Phillips), a starter and appropriate ballast choke (will depend on bulb nominal power consumption).
Wire the ballast, starter and bulb socket of some desk lamp you have (the...
I needed it too, and couldn't find it. There is no drop-in replacement, but Fairchild still makes similar ML2035 and ML2036.
Check:
http://www.fairchildsemi.com/pf/ML/ML2035.html
and
http://www.fairchildsemi.com/pf/ML/ML2036.html
KISS:
Distance and speed are within the reach of RS422/RS485 links.
If you do a little R&D after all and make a pair of interface boxes to convert signals (that is fairly simple, using two (1 Rx, 1 Tx) cheapo 5 Volt ICs per four signal lines per direction) that run to and from the floppy...
