Let’s see the top 10 electronic circuits and projects for September 2010. As you probably know, we publish this top 10 on monthly bases and we try to show you the most viewed articles on electroschematics.com in that month. For accesing the past related articles please use this tag: top 10 projects and circuits or check out the right sidebar.
September 2010 Top Projects and Circuits
- Solar charger
A solar charger circuit to charge Lead Acid or Ni-Cd batteries using solar energy. The circuit harvests solar energy to charge a 6 volt 4.5 Ah rechargeable battery for various applications. The charger has Voltage and Current regulation and Over voltage cut off facilities.
- Dog repellent
The electronic dog repellent circuit diagram below is a high output ultrasonic transmitter which is primarily intended to act as a dog and cat repeller, which can be used individuals to act as a deterrent against some animals.
- Wind powered battery charger
In this wind powered battery charger circuit the dc motor is used as a generator. The voltage output is proportional to its rpm. The LTC1042 monitors the voltage output and provides the following control function.
- Cheap metal detector
The working principle of this cheap and easy to build metal detector circuit consists in mixing two equal frequencies which causes a low-frequency interference. When one of the oscillators become unstable then the frenquency of the interference will be modified. The metal detector circuit is built with CD4011.
- Led searchlight
This LED searchlight comprises a sealed maintenance-free (SMF) battery, constant voltage battery charger, six high efficiency white LEDs and a LED light level control circuit.
- Mobile bug
This handy mobile bug or cell phone detector, pocket-size mobile transmission detector or sniffer can sense the presence of an activated mobile cellphone from a distance of one and-a-half metres. So it can be used to prevent use of mobile phones in examination halls, confidential rooms, etc.
- PIR sensor light switch
By using these readymade and pre-configured PIR sensors, even an average electronics hobbyist can construct his/her own Motion Sensor Unit. The one evening project presented here is based on a common and very popular PIR module SB0061
- Solar garden light
This Outdoor LED Solar Garden Lights project is a hobby circuit of an automatic garden light using a LDR and 6V/5W solar panel. During day time, the internal rechargeable 6 Volt SLA battery receives charging current from the connected solar panel.
- Touch switch
Here is a great collection of touch switch circuits. A touch switch is an electronic device that enables us to control a circuit by simply touching a sensor.
- Wireless light switch
The wireless light switch circuit described here requires no physical contact for operating the appliance. You just need to move your hand between the infrared LED and the phototransistor . The infrared rays transmitted by IR LED is detected by the phototransistor to activate the hidden lock, flush system, hand dryer or else.