Controlled Circuit | Electronic Project Circuits

Posts Tagged ‘controlled circuit’

Simple power down

This circuit adds a power down function to analog I/O ports (for example, the AD7769 and AD7774). Moreover, the diodes ordinarily needed to protect the devices against power-supply missequencing can be
eliminated
In the circuit, MOSFETs Q1 and Q2 switch the +5- and +12-V supplies, respectively, in a sequence controlled by two cross-coupled CD4001 CMOS NOR gates (U1C and U1D). The sequence in which power isapplied is important: The controlled circuits may be damaged anytime Vcc exceeds Vdd+0.3V. Consequently, the NOR gates must be powered from a 12-V supply throughout the power-down sequence. [...]

Dimmer or power control

You can use it with a bulb to vary brightness of bulb, this is a live circuit it can give a shock, enclose in plastic box, the pot should have a plastic knob, use a fuse, you can also use it for temperature control of soldering irons.

Read More Source:http://www.electronics-circuits.com/schematics/arc20050710.html
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