Vacuum Tubes Valves
Musical & effects
Yagi Uda Antennas
Metal Detector Circuits
Liquid Sensing Circuits
Light Sensing Circuits
Voltage Detector Circuits
Air-Gas Detection Circuits
Human Sensing Circuits
RF & Radiation
Optical Sensing Circuits
Free Energy Circuits
AC to DC & DC to DC
Solar Cell Circuits
Micro Power Circuits
Switching Power Supplies
Light Laser LED
Digital to Analog
Analog to Digital
Data Bus Circuits
Voltage to Pulse
Current to Voltage
Frequency to Voltage
RF Converter Circuits
Sine to Square Wave
Voltage to Current
voltage to frequency
Period to Voltage
Video Wall circuits
TV Video Circuits
Motor Control Circuits
8051 / 8052
PCB CAD Software
Car bike Circuits
555 Timer Circuits
Remote Control Toy
H Bridge Circuit
DIY HV Variable Cap
DIY PMA alternator
Interconnection & Timing
Digital Signal Integrity
Digital & Bipolars
Sensors & Detectors
Regulated Power Supply
4 Band Resistor
5 Band resistor
6 Band resistor
Car Bike Circuits
Car Bike Circuits
Morse Code Bicycle Safety Blinker
This is my first project using an AVR microcontroller and really the first embedded systems project I`ve done since college. I had two options for programming languages C and assembly. I chose assembly because I was familiar (at least with the 8051) and because it is well documented in the datasheets. Another advantage of assembly is the ability t
Adding Hazard Indicators Triumph Rat Motorcycle
For a while I have wanted to add a facility for hazard flashers to my Bonneville SE. I have read a couple of threads on this forum about the subject but not found anything which works like hazards should. I have therefore devised my own add-on system, which although is more involved to do compared to those on other threads, is a proper full hazard
car audio crossover
20W Car Radio Power Amplifier using TDA2005
The TDA2005 is class B dual audio power amplifier package specifically designed for car radio application. You can easily design car radio power booster..
Simple Motorcycle AlarmCircuit by Ron J
The following schematic shows the Simple Motorcycle Alarm Circuit Diagram designed and drawn by Ron J. It uses micro-switches to protect removable panels and..
12 Volt Car Lamp Dimmer Circuit Design using 555 Timer
The following schematic diagram shows the 12 Volt Car Lamp Dimmer Circuit Design using 555 Timer. This circuit design can be used to dim a standard 25 watt..
Simple Car Circuit Breaker Schematic Diagram
Circuit breaker is an electronic devices which function is to protect an electrical circuit from hazard/damage due to overload or short circuit. This car..
How To Build A Simple Car Alarm And Immobilizer
This circuit features automatic exit and entry delays - an optional instant alarm zone - an optional intermittent siren output - and an automatic reset. By adding external relays you can immobilize the vehicle and flash the lights. For automatic operation - use the contacts of a small relay in place of Sw1. Wire the relay coil so that it`s energiz
Motorcycle Alarm No.1 - Construction Guide
When one of the normally-open switches is closed - two things happen. Firstly - the negative side of the relay coil is connected to ground through D1. This causes the relay to energize. And the relay in turn sounds the siren. = Secondly - the emitter-base junction of Q1 is forward-biased. The transistor switches on - and current through R3 and Q1
Build Your Own Motorcycle Alarm
This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can immobilize the bike, flash the lights etc. I have used Andy`s Asymmetric Timer as the basis
Build Your Own Motorcycle Alarm
This circuit features an intermittent siren output and automatic reset. It can be operated manually using a key-switch or a hidden switch; but it can also be wired to set itself automatically when you turn-off the ignition. By adding external relays you can immobilize the bike - flash the lights etc. Any number of normally-open switches may be use
Simple Two-Transistor Motorcycle Alarm
When one of the switches is closed - the base of Q1 is connected to ground through D1 & R2. This switches Q1 on - and it in turn switches Q2 on. Q2 connects the positive side of the relay coil to the supply line. The relay energizes - and the siren sounds. = If R1 had a high value - moisture on the switches might be enough to lower the voltage - a
Luxury Car Interior Light
This circuit is much more modest, but certainly still worth the effort. It provides a high quality interior light delay. This is a feature that is included as standard with most modern cars, although the version with an automatic dimmer is generally only found in the more expensive models. With this circuit it is possible to upgrade second hand an
Circuit of power audio amplifier with circuit integrated tda2030 car amplifier 14 watts rms
TDA2030 is a circuit integrated monolithic in Pentawat ® package, to be used as class audio amplifier AB. Typically he supplies up to 14 Watts of potency (d=0. 5%) @ 14V/4 ©. The guaranteed potency is 12W in a load of 4 © and 8 watts in a load of 8 ©. Integrated him/it bill with circuits of component protection. Audio amplifier with having...
fake car alarm 555 led flash schematic
DIY Circuit Car Battery Charger
This very simple circuit uses a transformer, two diodes, a capacitor and an ammeter. To charge a battery just connect the + and terminals of the circuit to the corresponding terminals of the battery. When the battery is not charged, the ammeter reading shows 1-3 amps. When the battery is fully charged the ammeter reads Zero or nearly zero, af
Making a Remote Controlled Car using Sun SPOT
Here remote Sun SPOT will send data to Sun SPOT on car which will drive the IC according to DC IO pins D0 - D3. The IC will drive the Motors which will run the car. package org. sunspotworld. demo; import com. sun. spot. io. j2me. radiogram. Radiogram; import com. sun. spot. io. j2me. radiogram. RadiogramConnection; import com. sun. spot....
Automotive Alarm Circuits
Car Lighting Circuits
Car Parking Aid Circuits
Car Audio Circuits
Ultrasonic distance finder circuit
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is measured. There are three main categories of distance measurement methods in use: a) By...
Simple Metal detector circuit with CD4030
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to find something potentially valuable, hidden a few centimeters below the soil. So many...
Fully automatic watering circuit for flower pots
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This circuit comes as a solution to this problem. Depending on humidity of the pot at...
Simple deep searching metal detector circuit
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the circuit of this metal detector, it is possible to detect a metal coin in depth of 90 to...
Sub-Harmonic Bass Converter for Electric Guitars
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound, such as filtering or distortion. Instead, a frequency division system produces outputs...
Echo Depth Sounding Sonar for Boats
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the calibration of the rope. This arrangement still exists in some yachts. The big...
100W HiFi Audio Amplifier Circuit
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power supply must be symmetrical so that no electrolytic capacitors are needed at the outlet....
Plant-Pot Water Level Indicator Circuit
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower. The circuit of the device is shown in Figure 2. The water detection is made from the bottom...
Analogue Sound Preasure dB-Meter Circuit
The best human ear can capture sounds from 20Hz to 20KHz. These limits are known to be the broadest that can exist. Normally the normal limits range from 100Hz to about 13KHz and depend on the age and health of the individual. We for our measurements and to have a good accuracy we will get the limits of 20Hz to 20KHz. A sound to be heard does...
DIY HV Variable Capacitor
DIY PMA Alternator Plans
Digital Signal Integrity