Reply to "Two New Versions of Crossing LED Flashers Posted; with Adjustable Speed; all Build Files Included"

Rod StewartOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

Here's another adjustable speed LED activator, that will really appeal to the fans of 555 timer chips. It has all the attributes of the board above, but uses the 555 as the timing device. It also includes a small trim pot for speed adjustment. It has fewer components; only nine. Costs are about $5.90 each for all domestic boards and parts; or about $2.20 each for offshore components. It offers the versatility of either AC or DC power. Note that unlike the above board, it CANNOT work with common anode wired leds. The leds must be wired separately to the board.

Here is the circuit, 3D view, and a picture of a finished board:

The Gerber zip file and User Notes pdf is attached below, along with a pdf version of an excel sheet for choosing the right led ballast resistors.

Rod

Attachments

Hide

Images (3)

Files (3)

AC-DC DIY LED Flasher; NE555 Timer Notes R4.5.pdf

DIY LED Flasher Module 555 Timer R4.5 zip.zip

Values for Resistors R1 & R2 R4.1-2-5.pdf

1/26/203:24 PM

<ul id="{%=id%}ButtonGroup" class="button-group h-popup-buttons even-button-group even-1">
    <li id="{%=id%}Okay_buttonContainer"><a id="{%=id%}Okay" href="javascript:void(0);" class="button success no-margin-bottom h-alert-modal-ok-button" role="button">OK</a><script type="text/javascript">
        (function() {
            function {%=id%}Okay_click(event, data) {
            {%=id%}Popup.hide();
        }
        
                $('#{%=id%}Okay').on('click', {%=id%}Okay_click);
        })();
    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
        (function() {
            {%=id%}Popup = new SS.Popup.ModalPopup('{%=id%}');
        })();
    </script>

Skip to main content

Attachments

Membership Required

Remove From Your Block List

Manage Follow Preferences

Block

OGR Forum Supporting Membership Required

OGR Forum Supporting Membership

Help support this forum with an OGR Forum Supporting Membership.You will be able to watch the videos in the INSTRUCTIONAL VIDEO FORUM!A one-year OGR Forum Supporting Membership is only $12 per year, so sign up now!

OR

Access the ALL the OGR VIDEO FORUMS AND over 300 back issues of OGRwith a DIGITAL SUBSCRIPTION!

Please wait...

Help support this forum with an OGR Forum Supporting Membership.
You will be able to watch the videos in the INSTRUCTIONAL VIDEO FORUM!
A one-year OGR Forum Supporting Membership is only $12 per year, so sign up now!

Access the ALL the OGR VIDEO FORUMS AND over 300 back issues of OGR
with a DIGITAL SUBSCRIPTION!