Auto Power Off

We are surrounded by battery operated equipment of all kinds, and this array is growing still. Manufacturers and designers lean over backwards to make sure that their equipment draws a small current and can thus be operated by a battery. This has its flip side, too. because even if the equipment in question draws only […]

Electronic car ignition

click image for higher resolution ATTENTION: Don’t construct this project until this label is removed. There are some corrections that must be done in order to be full working. Sorry for the inconvenience. Description: This scheme is for 4 cylinder motor. This will make your car spent less fuel, be a little bit faster and […]

Car Horn Circuit

Circuit diagram: Parts: R1______________68K 1/4W Resistor R2_______________2K2 1/4W Resistor R3______________56K 1/4W Resistor R4_______________3K3 1/4W Resistor R5,R6____________4K7 1/4W Resistors R7______________10K 1/2W Trimmer Cermet or carbon C1,C2___________22nF 63V Polyester Capacitors C3,C5__________100nF 63V Polyester Capacitors C4_______________1nF 63V Polyester or Ceramic Capacitor C6_____________220µF 25V Electrolytic Capacitor IC1,IC2_________7555 or TS555CN CMos Timer ICs IC3__________TDA7052 Audio power amplifier IC (See Notes) […]

Touch Communicator – Counter

Circuit diagram: Parts: R1_______________1K 1/2W Resistor R2,R4____________1K8 1/4W Resistors R3______________68K 1/4W Resistor R5_______________4K7 1/4W Resistor R6______________10K 1/4W Resistor R7_____________680R 1/4W Resistor C1______________47µF 25V Electrolytic Capacitor C2,C3__________100nF 63V Polyester Capacitors D1__________Red LED 2mm. Axial SMD types preferable (See text) D2___________1N4148 75V 150mA Diode D3 to D7________LED Any color, shape and size (See text) Q1____________BC550C 45V 100mA […]