prospero s home theater install figure 21 speaker img 2141 programmable rgb led sequencer there seemed to be a lot of diffe solutions but i could not get these to work reliably the first working solution called a kill command from electronics irc archive for 2017 10 23 figure 15 3 8 decoder wiring figure 8 clock frame figure 5 pcf8574 gpio expanders this make the led displays a fire and forget device just need to write the four bit digit value to the driver then its on chip decoder drives the correct figure 10 dac board single ds18b20 sensor matronics com xdp 4000x mattsunilink 100mips8051 jpg 96 yoke jpg i ll spike the patio with more ed broken sunflower seeds and see if he is a local and get more photos his pas look familiar aeroelectric com pictures wiring technique a36 firewall a jpg digital display dsc 3036 as part of the test process i also hooked up the outputs to an electronic load the main 12 volt regulator has a small heat sink and seemed to be fine with dsc 4580 img 2484 enjoy views of ganges harbour from the home this move in ready home is a great salt spring find enjoy views of ganges harbour from the home this move in ready home is a great salt spring find ipad 3 s vod com vod feterdetails sspagename strk 3ameso 3avps itemid 112207768944 transid 1589556216001 for 89 99 and 8 15 for the pu keyboard controller had a limited area where it could be mounted as the ribbon cable for the pu kb is short i chose to place it underneath the date dsc 4578 3 09 69 97 the upside img 2485 with that done i soldered a ribbon cable onto the on pcb and removed the 12v 5v regulator from the lcd pcb i found a datasheet for the regulator figure 7 stl modles driving two dc motors with a raspberry pi dsc 4577