A previous Design Idea describes a circuit that uses an astable multivibrator to drive an LED (Reference 1). The circuit in Figure 1 uses a simpler alternative approach. The circuit uses a 2N3904 NPN ...

Ideally a circuit that use one socket, and can both ID it as a NPN or PNP, and ID the leads as a bonus. In the meantime I have my BK Precision in circuit transistor test that does that. A nice ...

The voltage on the emitter of the PNP transistor in this oscillator circuit is a good sawtooth (but do not load it much as it is at a high impedance). Also, the current out at the emitter of the NPN ...

We’ll dive into the basics of transistors, including the difference between NPN and PNP types, and explore their crucial role in creating electronic circuits. You’ll learn how transistors act ...

There are numerous differences between NPN and PNP transistors, ... This simple device can be used to ... BJT operates in this zone for amplifier circuits because the transistor can act as a ...

A very simple but highly efficient combination lock circuit ... A very simple but ... S5, S8, S9, and S10). These switches need to be "ON" (binary state "1") to forward-bias the transistor ...