tag:blogger.com,1999:blog-3918357578463150231.post2246901245320751249..comments2024-02-11T15:01:15.742+00:00Comments on daftmike's blog: Momentary latching circuitdaftmikehttp://www.blogger.com/profile/03897846991949063846noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-3918357578463150231.post-89710049407698004702013-03-14T01:22:22.844+00:002013-03-14T01:22:22.844+00:00i built the circuit above. one problem, i used a...i built the circuit above. one problem, i used a remote rf with relay to close the switch contact. it goes high, but will not open when i close the relay (momentatry) on the rf board. any ideas on how to fix this?<br />thanks to allAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-3918357578463150231.post-89447301381365098062012-04-27T10:43:41.770+01:002012-04-27T10:43:41.770+01:00Howdy daftmike !!!
Ive made one of these also awe...Howdy daftmike !!!<br /><br />Ive made one of these also awesome momentary to latching switch circuits as i had stocked up on momentary switches over the last few weeks but i made a pcb from the exact schematic you have shared here, i used a free software called "Yenka" which uses "realPCB" (another free software) to make the pcb but once all the components were soldered, i cheacked, tripple & quadruple-cheack all the solder joints for defects, but have a problem...<br /><br />I used all the stated components that your circuit used, NO Exceptions, as i wanted it to mirror your circuit to avoid problems!<br /><br />Anyhoo, i connect a 9v battery to the input power of the circuit and the output power to a simple heart-flasher circuit (using 555 timer & 4017 decade counter IC's) but strange behavior is being shown... This is what happens...<br /><br />When i push the momentary switch, the circuit lights up with a 10 second delay, i push the momentary button again and circuit switches off ! (sweet so far!)<br /><br />But when i leave it alone and not touch either circuit, the heart flasher starts working again without me pushing the 'on' button... I press the button again to switch off the circuit but then it starts up again every 10 seconds.<br /><br />***! HELP !***<br /><br />Have you had this problem or would you know whats gone wrong here ?<br /><br />I could send you a short video to show you whats going on but i have no idea how to contact you !!<br /><br />Please help because i really love the usefulness of this circuit and ive already bought 30 tactile momentary switches to be able to add this circuit to mostly all of my projects!! !!!! !<br /><br />Many thanks in advance,<br /><br />Kind & Best regards,<br /><br />Anil Sethi Jnrofftherails2010https://www.blogger.com/profile/10353192633864671745noreply@blogger.com