This is an introduction to the ADDAC900PDN Power Delay for New style Busboards by ADDAC System, available at Takazudo Modular.
The ADDAC900PDN is a small PCB that attaches to a busboard's power socket to delay the power supply. By inserting the ADDAC900PDN, you can delay the power supply to a specific module by 3 seconds.
This product is available for purchase below.
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Features of the ADDAC900PDN Power Delay for New style Busboards
The ADDAC900PDN was designed to increase flexibility and customization when powering up a modular system. When starting up a modular system, a current spike occurs during startup, which can temporarily affect the output of the power supply unit (PSU), and it may take several seconds for the PSU to stabilize to its rated specifications.
Additionally, PSUs may have delays between power rails, where one polarity is supplied before the other, or where power ramps up gradually. These phenomena are common and usually not a problem. While most modules handle this without issue, certain modules may fail to start up properly due to these conditions. In particular, some modules are sensitive to the timing of the +/-12V voltages, requiring both voltages to be supplied simultaneously, or failing to start if -12V is supplied before +12V.
This small PCB can adjust the timing of power delivery to specific modules, delaying each power rail by 3 seconds. This means that after powering up the modular system, the specified module will wait 3 seconds before receiving power. This delay time can also be customized by the user by replacing certain capacitors.
By using this small PCB with sensitive modules, you can avoid the initial current spike and supply power to the module once the PSU has reached a stable state, ensuring that +/-12V is delivered precisely simultaneously.
In addition to this highly technical application, there are various other creative and practical uses. For example, you can connect it to specific modules that "drive the patch," such as sequencers or clocks, allowing time for other modules to start up and stabilize before these modules power on. Taking this idea further, you could use multiple 900PD boards with different capacitors to sequentially power on modules in order. This is useful for generative patches using power timers in exhibitions or galleries.
Another handy hack is to use it when a frame won't start up due to the initial current "spike." Normally, in such cases you would remove one or two modules, start the frame, and then reconnect the additional modules. Note: This kind of power-on issue indicates that the PSU is approaching its maximum capacity, and this board should not be used as a permanent solution -- a PSU upgrade is recommended. However, if an extra module added last minute before a live show causes the PSU protection to kick in and prevent startup, this board can be used as a temporary hack to make startup easier for that performance.
This board has two sets of jumpers for independently delaying the -12V, +12V, or both power rails.
This board connects to the busboard and provides a connector for the ribbon power cable.
Disclaimer: This product should not be used with modules that require an external +5V power supply.
ADDAC Systemについて
ADDAC Systemはポルトガルのモジュラーシンセメーカーです。
アナログ良さを生かした、ベーシックな機能をしっかり形にしているモジュールラインナップを基本としつつも、CVをMIDIに柔軟にコンバートしたり、高度にコントロール可能なグラニュラープロセッサー等、デジタル技術もうまく調和させた独創的なモジュールも数多くリリースしています。
That concludes the introduction to the ADDAC900PDN Power Delay for New style Busboards.
We hope you found this helpful.