An improved version of the simple 3 Red LED flashing bike rearlight.
The main improvement is to use PNP transistors to make the astable multivibrator stage and then to use an
NMOSFET to drive the LEDs. That way the circuit does not waste over 20mA base current in just turning
a on PNP bjt every time the the LEDs are turned on.
A second improvement is to use the Vishay TLCR5800 Ultrabri...