I am using a self-built electromagnet in my project that consumes 9.0 amps at supplied voltage of 12 VDC. I don't mind even if amps goes high. The power supply I am using can provide up to 30 amps. I have to experiment with providing an oscillating power supply to electromagnet.

I want to use IC 555 timer for that purpose. But IC 555 timers that I searched appear to have output 200 mA. Is there any 555 timer that provides high current what I need OR is it possible to use same 555 timer with some external equipment for that. Any sources or tutorial for that will also be very helpful.

  • \$\begingroup\$ What's wrong with using a separate driver? \$\endgroup\$ – Ignacio Vazquez-Abrams Jan 22 '14 at 11:47
  • \$\begingroup\$ We've already discussed using an H-brdige driver for your project. Why would you abandon that? \$\endgroup\$ – Dave Tweed Jan 22 '14 at 12:15
  • \$\begingroup\$ @DaveTweed: That is not abandoned. These are two separate things. \$\endgroup\$ – enterprize Jan 22 '14 at 12:24
  • \$\begingroup\$ @IgnacioVazquez-Abrams: Can you please provide some source/tutorial for that. I have not found that in my search for oscilating power supply. \$\endgroup\$ – enterprize Jan 22 '14 at 12:26
  • \$\begingroup\$ The H-bridge driver discussed in your other question is the component that converts a 555 timer (providing the low-current oscillating signal) and your DC power supply (providing the steady high current) into a high current oscillating power supply. \$\endgroup\$ – Chris Johnson Jan 22 '14 at 12:47

No, there is not a 555 timer that can drive 9 amperes. However, a 555 can drive a transistor which can drive 9A.

  • \$\begingroup\$ OK, that is very nice. Can you please put here a link of such a circuit/tutorial. \$\endgroup\$ – enterprize Jan 22 '14 at 13:28
  • \$\begingroup\$ @enterprize I already did. The linked Wikipedia article not only demonstrates the basic use of a transistor, but tells you about the different kinds, history, construction, underlying physics, and links you to dozens more concepts you should study. \$\endgroup\$ – Phil Frost Jan 22 '14 at 13:31
  • \$\begingroup\$ thank you very much, I have already read that and many others about transistors. I can & will search more based on your answer about this specific problem. Basically I ask bec you may already have some very good links to one. \$\endgroup\$ – enterprize Jan 22 '14 at 13:43
  • \$\begingroup\$ @enterprize Google works by seeing what links people have. If you want to get a consensus on what most people think a good link for some topic is, Google is exactly that. \$\endgroup\$ – Phil Frost Jan 22 '14 at 13:52

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