A 16-bit digital event sequencer with 50 ns resolution and trigger jitter is implemented by using an internal 32-bit timer on a dsPIC30F4013 microcontroller, controlled by an easily-modified program written in standard C. It can accommodate hundreds of output events, and adjacent events can be spaced as closely as 1.5 µs. The microcontroller has robust 5 V inputs and outputs, allowing a direct interface to common laboratory equipment and other electronics. A USB computer interface and a pair of

more »

... analog ramp outputs can be added with just two additional chips. An optional display/keypad unit allows direct interaction with the sequencer without requiring an external computer. Minor additions also allow simple realizations of other complex instruments, including a precision high-voltage ramp generator for driving spectrum analyzers or PZT positioners, and a low-cost PID controller and lock-in amplifier for laser frequency stabilization with about 100 kHz bandwidth.