This circuit was obtained from Motorola documentation. It generates light pulses at a rate of 120 per minute. Equivalent transistors can be used. The circuit can also excite high brightness LEDs.
The values of the components in this experimental circuit are those of the previous circuit. The...
The experimental musical instrument with the LM3909 is suggested by National Semiconductor in...
With the values of the components indicated, the circuit generates a 1 kHz signal. The power...