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1969 Pontiac Firebird Electrical Wiring DIagram

1969 Pontiac Firebird Electrical Wiring DIagramThe Part of 1969 Pontiac Firebird Electrical Wiring DIagram: down shift switch solenoid, neutral safety switch, backup light switch, stop light switch, coil, breaker, oil press switch, alternator, horn, high beam headlamp, low beam headlamp, parking light, directional signal, marker light, starter, alternator regulator, idle solenoid, wiper motor, battery, parking light, directional signal, windshield washer solenoid, buzze...

AVR Dongle Circuit

This circuit is intended to program AVR controllers such as the AT90S1200 via the parallel port. The circuit is extremely simple. IC1 provides buffering for the signals that travel from the parallel port to the microcontroller and vice versa. This is essentially everything that can be said about the circuit. The two boxheaders (K2 and K3) have the ‘standard’ ISP (in system programming) pinout for the AVR controllers. The manufacturer recommends these two pinouts in an attempt to create a kind of standard for the in-circuit programming of AVR-controllers....

Condenser Mic Audio Amplifier Circuit Diagram

The compact, low-cost condenser mic audio amplifier described here provides good-quality audio of 0.5 watts at 4.5 volts. It can be used as part of intercoms, walkie-talkies, low-power transmitters, and packet radio receivers. Transistors T1 and T2 form the mic preamplifier. Resistor R1 provides the necessary bias for the condenser mic while preset VR1 functions as gain control for varying its gain. In order to increase the audio power, the low-level audio output from the preamplifier stage is coupled via coupling capacitor C7 to the audio power amplifier...

20W CLASS A POWER AMPLIFIER ELECTRONIC DIAGRAM

20W CLASS-A POWER AMPLIFIER ELECTRONIC DIAGRAMThe 0.25 Ohm resistor should cause little grief (4 x 1 Ohm 1W resistors in parallel), but some experimentation may be needed here, since the base-emitter voltage of the BC549 determines the current. This circuit works by using the BC549 to steal any excess base current from the compound pair. As soon as the voltage across the 0.25 Ohm resistor exceeds 0.65V, the transistor turns on and achieves balance virtually instantly.The 1k trimpot in the collector of the first LTP transistor allows the DC offset to be adjusted....

Very Low Power 32kHz Oscillator

The 32-kHz low-power clock oscillator offers numerous advantages over conventional oscillator circuits based on a CMOS inverter. Such inverter circuits present problems, for example, supply currents fluctuate widely over a 3V to 6V supply range, while current consumption below 250 µA is difficult to attain. Also, operation can be unreliable with wide variations in the supply voltage and the inverter’s input characteristics are subject to wide tolerances and differences among manufacturers. The circuit shown here solves the above problems. Drawing...

1992 Audi 80 Wiring Diagram

1992 Audi 80 Wiring Diagram (click for full size image) The Part of 1992 Audi 80 Wiring Diagram: zener diode, panel circuit, heater seat, gear, ignition, ABS control, horn push, tail pilot instrument, tail instrument headlight, capacitor, rectifier, alternator, speedometer illumination, pilot light, fuse and relay, alternator, fuel injection, fuse relay, tachometer illumination, stop lamp, contact breaker, capacitor pack, lighting switch, central and locking circui...

Boost System

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FPF270X Over Current Protection

Using the FPF270X adjustable over-current protection IC can be designed a very simple adjustable current-limiting electronic project .FPF270X provide full protection to systems and loads from excess current conditions.Minimum current limit is adjustable from 0.4A to 2.0A.The input voltage range is 2.8V to 36V. Loads can be activated or deactivated with a low-voltage logic compatible ON pin. Fault conditions can be monitored using the error flag pin and/or the power-good pin.All devices clamp the load current so that it cannot exceed an externally...

Safety Guard Circuit

DescriptionProtect your home appliances from voltage spikes with this simple time delay circuit. Whenever power to the appliances is switched on or resumes after mains failure, the oscillator starts oscillating and D5 blinks. This continues for three minutes. After that, Q14 output of IC CD4060 goes high to trigger the gate of the SCR through D4. At this moment, the voltage is available at the cathode of the SCR, which energizes the relay coil to activate the appliance and D6 glows. Switch SW1 is used for quick start without waiting for delay. Circuit...