Powerful IR Emitter (CB26030E)

This modulated circuit was found in the November 1997 Electronics Now magazine. The power transistor can be any MOSFET,

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Coaxial Cable Driver (CB5937E)
The integrated circuit of this 80's project is not common today. This is the HA2530 which must be...
Flash trigger with delay (CB8107E)
This circuit is from a 1992 PE Hobbyst Handbook. The circuit fires an old electronic flash using an...
Differential Amplifier Stage (CB968E)
This complementary transistor stage was found in a 1968 publication. The transistors are germanium types and...