a
This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to flash at a frequency that depends on capacitor C1.The circuit is ultra-low-power and can be powered by a single battery for months.

a
This circuit was obtained from a 1978 Practical Wireless. It causes a low-power 1.5V lamp to flash at a frequency that depends on capacitor C1.The circuit is ultra-low-power and can be powered by a single battery for months.