Long-Delay Op Amp Timer:  After some experimentation I ended up with the circuit shown in Fig 2. It comprises a timing capacitor, a FET-input 3140-type IC configured as a voltage follower, and a second IC, a 741, which functions as a voltage comparator and relay driver. (added 03/05)

Low Voltage High Current Time Delay Circuit:  (circuit added 7/02)

Power Off Time Delay Relay Circuit:  (electronic circuit added 7/03)

Power on Time Delay Relay Circuit:  (circuit / schematic design added 6/06)

Power- On Time Delay Relay:  (electronic design added 10/06)

Power-Off Time Delay Relay:  (electronic design added 10/06)

Relay Delay:  (electronic design added 10/06)

Relays: Delayed Turn-On:  (circuit added 9/04)

Smooth Tone Clickless Cw SideTone Generator:  (electronic circuit added 7/03)

Time Delay Generator:  Circuit Ideas for Designers Application Notes Advanced Linear Devices, Inc.  (app note added 6/06)

Time Delay Relay II:  (circuit / schematic design added 6/06)

Time Delay Relay Reduces Inrush Current:  03/07/02  EDN Design Ideas / (schematic / circuit added 11/03)    A transformer switching onto a line can sometimes cause a circuit breaker to trip or a fuse to blow. This phenomenon occurs even if the transformer presents no load, such as when the secondary is open. The problem arises because of the heavy magnetizing inrush current in the transformer. The amplitude of the current depends on the instant on the ac waveform at which the transformer become... .

Time Delay Relay:  (electronic (schematic / circuit added 4/02)

Transistors Offer Overload Delay:  09/16/04 EDN Design Ideas  /  (added 1/05)    Although an SMPS (switch-mode power supply) can protect itself against permanent short circuits, it sometimes has problems when dealing with transient overloads. Transient overloads are not short circuits but can push the power supply above its nominal load value. This scenario occurs with typical loads such as printer heads and small motors....

Windshield Wiper Delay:  (electronic circuit added 7/03)