This circuit with two HT2030s powers 6 LEDs in a decorative flashing system. The circuit is from Electronics Now magazine, December 1997. The LEDs are fed in sequence.
Suggested by Motorola documentation from the 1980s, this circuit makes use of MOSFETs of the time....
In the figure we have a small general-purpose amplifier with the LM386 integrated circuit and...
This circuit allows you to use a digital multimeter as a thermometer. The sensor is mounted in a...