The load is driven by the MOSFET IRFZ44 and 4093 AND gates are used in the circuit. The output of the 4093 IC drives the MOSFET. Only one button allows you to change the on-off state of the electronic circuits in which you use this switch. The circuit schematics is above. Click image to see [...]
Double-tone Police sound Single-tone old ambulance sound This circuit is intended for children fun, and can be installed on bicycles, battery powered cars and motorcycles, but also on models and various games and toys. With SW1 positioned as shown in the circuit diagram, the typical dual-tone sound of Police or Fire-brigade cars is generated, by [...]
The “de luxe” schematic makes use of all four schmitt trigger nand’s of the HEF4093 IC The on time is set by the one shot built with R2/R3 C3 and IC2A: when the pushbutton is depressed C3 will be charged slowly through R3/R2; as long as the voltage of C3 is below the schmitt trigger [...]
Entries (RSS)
Link electronics
Copyright © 2010. All rights reserved. Any circuit and content represented are property of owner.