loading
64Comments

Tell us about yourself!

Complete Your Profile
  • jimdkc commented on pandyaketan's instructable LED on AC Mains5 hours ago
    LED on AC Mains

    You do need the diode because an LED can only tolerate about 5-6 volts of reverse voltage.

    View Instructable »
  • jimdkc commented on Nikus's instructable 555 Useless Machine2 weeks ago
    555 Useless Machine

    No. You need to either use a DC gear motor or remove the servo control board and wire directly to the motor. Also, the servo should be a continuous rotation type.

    Yes! Absolutely! The 555 is a great chip to have in your arsenal! No better way to learn it than to actually use it!

    Yes, an Arduino is overkill for this project. But, so is a 555 timer.

    View Instructable »
  • Make a woodshop pre-filter (aka cyclone) for $8

    If you have a Firehouse Subs near you, they sell their bright red 5-gallon pickle buckets for $2 each. Proceeds go to provide life-saving equipment and resources for firefighters, police, and EMTs. The buckets do smell like pickles, but that shouldn't matter for this use! Good sandwiches, too!

    View Instructable »
  • jimdkc commented on amandaggogo's instructable Zipper Face Tutorial Redux3 months ago
    Zipper Face Tutorial Redux

    A Zipperface is always a fun costume to do!

    View Instructable »
  • jimdkc commented on MakeStuff_MS's instructable DIY mini Amplifier using TDA28224 months ago
    DIY mini Amplifier using TDA2822

    OK... I see from the datasheet of a TDA2822 that this is a correct bridge configuration. Normally for a bridged amp, you have to drive both inputs. Apparently this amp chip takes care of that internally.

    Well... it could be a bridged amplifier... except the input of one of the amps is grounded, so only 1 amp in the chip is active! To make it a bridged amp, you'd have to unground pin 6 and feed an inverted copy of the input signal to pin 6.The way this amp is designed, half of the amp chip is wasted.

    View Instructable »