Guest joshff91 Posted February 14, 2015 Report Share Posted February 14, 2015 HiI cant get the Data LED's, at the decoder, to respond to my input from the encoder, any ideas? thanks. Pictures underneath...I have recently purchased a few HT12E and HT12D ICs. i made a remote circuit using - letslearnelectronics.blogspot.in/2012/07/introduction-to-encoding-and-decoding_1610.html?view=sidebarI have also been using holtek data sheetsHT12E - holtek.com/pdf/consumer/2_12ev120.pdfHT12D - holtek.com/pdf/consumer/2_12dv120.pdfI can get the valid transmission (VT) LED to energise and de-energise using a switch @ the TE pin on the encoder side of the circuit, or i can get it to permanently energise by connecting the TE pin to ground (active low) - this works as expected from reading both data sheets. However i cannot get the four LED's which are connected to the decoders data line to respond to the input from the encoder. They are permanently on. I have looked at many versions of this circuit online and they all seem to be the same. They all reccomend using switches on the data input @ the encoder.Like i said all 4 of my leds stay energised....Any help would be great thanks Quote Link to comment Share on other sites More sharing options...
Guest liquibyte Posted February 14, 2015 Report Share Posted February 14, 2015 No need to post this thread in two sections. I removed the one in projects q/a. Quote Link to comment Share on other sites More sharing options...
audioguru Posted February 14, 2015 Report Share Posted February 14, 2015 This thread is also on at least two other websites.I think the 5V regulator is oscillating because the capacitors for the regulator should be ceramic and mounted much closer to the pins of the regulator. Quote Link to comment Share on other sites More sharing options...
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