Coordination

Coordination is a handy utility module that can find its home in the smallest or biggest of racks. When used in conjunction with the rest of your system it provides a steady hand to guide your patch where you want it to go. There are 4 identical channels on board. When a channel's mode switch is up, that channel ignores the input and outputs a voltage between negative and positive 8 volts based on the position of the slider. When the mode switch is down, the top of the slider is switched to the input jack and the bottom of the slider is switched to ground. Because the inputs are normalled to positive 5 volts,  a channel with no input produces a voltage between 0 and positive 5 volts. You can also patch in any external CV or audio signal and use the slider as an attenuator for that signal. LEDs for each channel indicate whether the output is positive or negative and how strongly.

The sliders are Bourns PTA 3043-2015DPB104. All other components are normal Sentient Synths varieties - 0805 passives, SOIC TL074s. LEDs can be any 3mm. We use standard brightness, and for this module you may find you'll want to choose LEDs with very low forward voltage to ensure they aren't off for most of the DC supply range of each channel. Always choose current limiting resistors for appropriate power draw and brightness. 

When building the module start with the lowest and smallest components first. On this board they are all on the back. Resistors and capacitors, then ICs and diodes. Once all the SMD components are installed on the back, flip the board over to the front and place the sliders, jacks, switches and LEDs in their homes and install the front panel while soldering them to ensure correct alignment. If you find it's too difficult to hold everything together at once, try doing just the jacks, then add the switches and finally the sliders. Always solder just one leg of each component and check its alignment before fully soldering it down.