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=== Analog Theory of Operation=== | === Analog Theory of Operation=== | ||
Here is a simplified diagram of the Analog and high voltage part of the system: | Here is a simplified diagram of the Analog and high voltage part of the system: | ||
[[Image: | [[Image:lighting_block.png]] | ||
The high current switching element in an AC dimmer is an optically coupled | The high current switching element in an AC dimmer is an optically coupled | ||
triac. These are commonly known as SSRs (Solid State Relays) SSRs will turn | triac. These are commonly known as SSRs (Solid State Relays.) SSRs will turn | ||
on when a voltage is applied across the control pins. Once an SSR is turned on, | on when a voltage is applied across the control pins. Once an SSR is turned on, | ||
it will not turn off until no current flows through it. | it will not turn off until no current flows through it. | ||
AC dimmer circuits exploit this fact by turning the SSR on in phase with the | AC dimmer circuits exploit this fact by turning the SSR on in phase with the | ||
AC waveform. For example, to run a light at | AC waveform. For example, to run a light at 50% intensity, a circuit pulses | ||
the SSR about half way through each phase of the AC sine wave. | |||
See [[Lighintg Analog Details]] for the full description of the analog circuitry. | |||
See [[ | Status: Implemented and working. A respin of the PCB to fix a routing error may be required. | ||
==Computer Control System== | ==Computer Control System== |