This is basically the same circuit as the previous one, but using PNP transistors. In the original 80's an unusual transistor is used today. We suggest the TIP31 and for smaller currents the BD135. The frequency is 1 pulse per second.
This is basically the same circuit as the previous one, but using PNP transistors. In the original 80's an unusual transistor is used today. We suggest the TIP31 and for smaller currents the BD135. The frequency is 1 pulse per second.
