This circuit was found in a Philips documentation from 19678. The transistors are from the period with emphasis on the married pair. Modern equivalents can be used.
This circuit is from a documentation on the MC1539 from Motorola and may, however, be implemented...
This circuit makes na incandescent lamp flash fast producing the stroboscopic effect. The speed is...
This interesting circuit found in an Elektor from the 90s controls loads in four quadrants of the driving...