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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Short Protected Power Supply (CB16328E)
We found this protection circuit for power supplies with the 12 V power supply itself in a 1982...
Unijunction Time Base (CB19138E)
We found this time base of 0.1 to 90 seconds in a circuit manual from the 90s. The single-use...
Infrared Remote Control Transmitter (CB18723E)
This circuit can be used with the CIR12053 receiver or with others shown in this section of the...