Using NE555 to make a digital logic test pen
Source: InternetPublisher:张三叔 Keywords: NE555 logic test circuit Updated: 2024/08/21
This circuit uses the set and reset characteristics of the trigger terminal 2 and the threshold terminal 6 of the 555 circuit to form a test pen to detect whether the digital logic state is normal. If the probe IN input is low level "0", LED2 lights up, and when the input is high level "1", LED1 lights up. The R1, C2 and R2, C3 networks are acceleration networks. This logic pen is suitable for testing digital circuits such as TTL and CMOS. When measuring, this circuit should be grounded with the circuit under test.
- NE555 exit reminder
- Using NE555 to delay the output of high level circuit
- Circuit diagram of pocket electronic timer hypnotic massager composed of NE555
- NE555 multi-purpose delay switch power socket
- A doorbell circuit with a blinking LED
- 555 amplified exposure time automatic controller circuit
- 555 infrared sound and light alarm circuit
- 555 simple washing machine timer circuit
- 555 fluorescent lamp group centralized rectification and starting circuit
- 555LCD digital clock hourly self-timer circuit
- NE555 exponential voltage controlled oscillator circuit diagram
- multi-tone alarm
- multi-tone alarm
- Use NE555 to make a touch self-extinguishing table lamp
- Use NE555 to make a single-button touch light switch
- Using NE555 to make an incandescent lamp life extension controller
- Single-button bistable electronic switch made using NE555
- Control circuit using NE555 integrated circuit_1
- Switching regulated power supply circuit diagram composed of NE555
- Stable output DC and DC converter circuit diagram composed of NE555