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- Onboard NE555 chip
- Single signal output, the output duty cycle is about 50% square wave
- On-board adjustable resistor, adjusting the resistance value can control the output frequency
- Onboard power indicator
- Operating voltage: 5~12V
Product Description
NE555 Pulse Generator is precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled independently with two external resistors and a single external capacitor.
The threshold and trigger levels normally are two-thirds and one-third, respectively, of VCC. These levels can be altered by use of the control-voltage terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the threshold level, the flip-flop is reset and the output is low. The reset (RESET) input can override all other inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset, and the output goes low. When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for supplies of 5 V to 15 V. With a 5-V supply, output levels are compatible with TTL inputs.
D. T.
Reviewed in the United States on September 24, 2024
I'm actually filtering these to imitate sine waves, but they are very compact and handy. I'm pleased.
David Isaacs
Reviewed in the United States on January 10, 2024
I selected this pulse generator because as an electronics hobbyist, I do a lot of "tinkering" with 555 chips. These modules offer a fully-functioning 555 already assembled with a couple caps and resistors and ready-to-go. This module is exactly what I've been looking for and I couldn't be more satisfied with the quality and the bargain price. Having a prepared module like this saves me a bit of work and time by having the components all together and ready.
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