Only 6 of the 8 relays on the board are used. The image below shows the control board connected to an 8 channel, 12 volt, opto-coupled relay module. However, if you want to control different LED modules, or lights with different voltages the board can be connected to a relay module, the relay outputs then switch the alternative lights. The control board can directly drive the 12 volt Kingbright LED modules shown on the original project page ( see here). Race-Start-Controller-Quick-Start-Guide-November-2019 Download Operating with Relays I’ve tried to keep the component and connector numbering the same as the original PCB The original project page also has links to download the firmware for the PIC16F1823.Ī revised schematic for the new PCB can be downloaded below. All connections and operation are the same as the original project (see here). The actual circuit is identical to the original with the addition of the JP4 header, R8 and a 2-pin header, OPT1. The new PCB is slightly larger than the original and double-sided which makes assembly easier.Ī revised schematic for the new PCB can be downloaded below. This was something quite a few buyers of the original board had wanted to do, so it made sense to include this. It’s essentialy the same project, uses the same firmware and has the same functionality as the original but I’ve taken the opportunity to add a new header that will make it easier to connect relay modules in place of the orginal LED cluster modules. After yet another enquiry I decided to revisit the project, lay out a new PCB and have a small batch of boards manufactured.
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