Balanced modulator (CB7927E)

We found this circuit in a 1968 Hughes publication. The components are from the era and can be replaced by modern equivalents.

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Rectangular oscillator (CB10134E)
This conventional astable multivibrator circuit with operational amplifier can be found elsewhere on...
150 mA LDO with Texas Instruments TPS780 (CB12548E)
The LDO series (Low Dropout) TPS80 from Texas Instruments (www.ti.com) can provide output voltages...
Solar alarm clock (CB6861E)
This circuit was found in a Hands On Electronics from the 80's. The circuit emits an audible alert...