All the trap mechanisms are based on a 555 monostable solenoid triggering circuit that ensures that a pulse of sufficient duration is sent to the solenoid to trigger the trap correctly.

The 555 timer IC is an integrated circuit (chip) which is used in a variety of timer, delay, pulse generation, and oscillator applications. 555 Signals and Pinout ... 555 as Monostable.

All the trap mechanisms are based on a 555 monostable solenoid triggering circuit that ensures that a pulse of sufficient duration is sent to the solenoid to trigger the trap correctly.

For those needing a method to capture a light pulse and even color, the circuit in the figure may offer a solution—without investing hundreds of dollars.

Due to complementary outputs, the circuit has no stable state, and it toggles continuously, generating an output clock. The time constants R 2 C 2 and R 1 C 1 set the high and low time periods, T H ...

Read this article online. The circuit in Figure 1 allows you to convert capacitance into a pulse train by using a constant current source and a linear monostable formed by two NAND-gate chips ...