Device selection by 3-8 decoder At this circuit, the selection of seven devices are done using the decoder(74HC138). Device number Device 0 BCD-SW for 10th of the minute 1 BCD-SW for 1st of the minute 2 Start switch 3 Unused 4 7 segment LED for 10th of minute 5 7 segment LED for 1st of [...]
Digital LCD Thermometer Circuit At this thermometer, the IC thermo sensor (S8100) or the diode (1S1588) is acclimated as the thermo sensor. Back application the IC thermo sensor, the thermometry to +100°C from -40°C is possible. Also, back application the diode, the altitude to +150°C from -20°C is possible. Both sensors are independent in the [...]
Rangkaian Pendeteksi Hujan-Rain Detector This rain detector will accord you a heads-up the burning it starts to rain, hopefully giving you time to abutting windows and accompany in possessions. The battery-powered ambit draws around no accepted back the sensor is dry and the accepted burning is low back the buzzer is activated so a brace [...]
Skema Rangkaian Kompas Digital Compass Digital Specifications: · Power: 5-18 volts DC @ 30 ma · Inputs: Earth’s magnetic field · Outputs: Open collector NPN, sink 25 ma per direction, digital output 1 or 0 · Size: 12.7 mm diameter, 16 mm tall · Temp: -20 to +85 degrees C · Provides 8 headings (N, [...]
Switch Mode Pre-Regulator Circuit The botheration was that a voltage regulator had to bead the 18 volt capital ability accumulation voltage to 8 volts at 500ma to ability the CD player, crumbling 5 watts of ability and causing a lot of calefaction central the bunched unit. This ambit acts as an interference-free pre-regulator to abundantly [...]
Latching Relay On/Off Switch Circuit The ambit beneath switches AC or DC ability to a amount application an ultra low ability 3v latching broadcast with two coils. The broadcast can handle about 10 amps of current, up to 250vac. Anniversary time the baby pushbutton is pressed, the ambit either latches the broadcast contacts bankrupt or [...]
Heart Lamp with Flashes 18 LEDs Circuit This activity flashes 18 LEDs at three altered ante and you can use these to actualize an clear Valentine Heart. The ambit is kept simple (and low cost) by application the 4060B IC which is a adverse and oscillator (clock) in one package. The ambit requires a 9V [...]
