An astable 555 multivibrator circuit, where the timing characteristics are determined by the interplay of an ... spikes up and exceeds the 555’s trigger voltage of 2Vcc/3. Output (Vo) at pin 3 goes ...

Here is a monostable multivibrator using IC CD4538. It is a precision monostable/astable multivibrator IC free from false triggering. This can be used for. ... This drives the load through the PNP ...

For the 555 design contest (www.555contest.com) I built a multivibrator using a circuit pretty much like this one, and fed taps from both sides into the inputs of a 556 (dual 555) timer which ...

[michimartini] over on Hackaday.io loves playing with multivibrator circuits, and has come across a simple example of a ring oscillator. This is a discrete transistor RC-delay design utilizing five… ...

In this case, the op amp’s output (pin 1) goes high and switches transistor T1 on. As a result, the low-frequency astable multivibrator, wired using the NE555 timer (IC2), is disabled ( Fig. 2 ).

My teacher friend was looking for Christmassy technology ideas for a science + engineering club. And I said that flashing leds might be good, and if you can get three phases going, you can have a ...