555 Timer Circuits

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Multiplexed bcd-to-parallel bcd converter
Water-Leak Alarm
Ac-To-Dc Converter
1.5V to 5V/12V DC/DC Converter with LT1073
DIY Single-Ended (SE) 6L6 / 5881 Tube Amplifier
upc1651 fm transmitter circuit
A potentially novel pre-amp for electret mic capsules which have their internal FETs Drain and Source connections available separately
GS1674 Adaptive Cable Equalizer
Table circuit voltage electric lines
Automatic anti-frost crop controller circuit diagram