tag:blogger.com,1999:blog-264763802009-02-21T16:17:30.229+02:00kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.comBlogger9125tag:blogger.com,1999:blog-26476380.post-1149166642694309382006-06-01T15:53:00.000+03:002006-06-01T15:57:22.703+03:00

This flashlight has three different modes of operation, regular flashlight, flashing LEDs, and sound-operated light.Flashlight in action:Most small AA battery type flashlights use two cells, but that does not supply quite enough voltage for these LEDs, so parts from two plastic flashlights were joined together to allow room for three AA cells. The LEDs were mounted in the head of the flashlight

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1148036088812477092006-05-19T13:30:00.000+03:002006-05-19T13:54:48.823+03:00

This circuit regulates the power flowing from a photovoltaic panel into a rechargeable battery.Device:It features easy setup with one potentiometer for the float voltage adjustment, an equalize function for periodic overcharging, and automatic temperature compensation for better battery charging over a wide range of temperatures.The design goals of this circuit were efficiency, simplicity,

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145722777659076292006-04-22T19:13:00.000+03:002006-04-22T19:50:01.286+03:00

The circuit Here is the circuit for VGA to scart connection. It is basically a circuit which takes VGA signals and converts it to RGB + composite sync signal which can be fed to TV via SCART connector. VGA card picture components RED, GREEN and BLUE are already at the correct voltage level (0.7Vpp) and has correct impedance (75 ohm) for direct connection to correspondign inputs in the TV. What

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145627945992301192006-04-21T16:56:00.000+03:002006-04-21T17:07:27.000+03:00

Volume Unit Meter with a dynamic range of 60 db by Jon Munson of Linear Technology Corp An audio volume-unit meter displays peak-related audio amplitudes to aid in accurately setting recording levels or for displaying an amplifier's operating conditions. A simple diode and capacitor network provides a classic volume-unit meter's peak-weighted response, but the circuit typically limits response to

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145524139553301862006-04-20T12:03:00.000+03:002006-04-20T12:08:59.563+03:00

This circuit uses a sensor made of a small piece of etched PC board and a simple SCR circuit to detect rain and sound a buzzer. The SCR could also be used to activate a relay, turn on a lamp, or send a signal to a security system.Schematic:Parts:Part Total Qty. Description SubstitutionsR1 1 1K 1/4 W Resistor R2 1 680 Ohm 1/4 W

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145463749394458292006-04-19T19:00:00.000+03:002006-04-21T17:05:34.773+03:00

Recently, a fellow amateur was looking for a gel cell charger which would first charge at a fixed rate and then later switch to a trickle charge when the cell was fully charged. After reviewing several catalogs and web sites, the MAX712 IC was discovered. This IC meets all the requirements for almost any type of battery charging system. The circuit in Figure 1 was designed specifically for 12

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145455558945376632006-04-19T17:00:00.000+03:002006-04-19T17:06:49.226+03:00

The 22 watt amp is easy to build, and very inexpensive. The circuit can be used as a booster in a car audio system, an amp for satellite speakers in a surround sound or home theater system, or as an amp for computer speakers. The circuit is quite compact and uses only about 60 watts. The circuit is not mine, it came from Popular Electronics.Schematic:Parts:Part Total Qty.

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145445150059212772006-04-19T14:03:00.000+03:002006-04-19T22:48:55.110+03:00

3 LEDs signal bumper-barrier distance, Infra-red operation, indoor use.Schematic (click to enlarge):Parts:R1_____________10K 1/4W ResistorR2,R5,R6,R9_____1K 1/4W ResistorsR3_____________33R 1/4W ResistorR4,R11__________1M 1/4W ResistorsR7______________4K7 1/4W ResistorR8______________1K5 1/4W ResistorR10,R12-R14_____1K 1/4W ResistorsC1,C4___________1µF 63V Electrolytic or Polyester

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0tag:blogger.com,1999:blog-26476380.post-1145443367881545542006-04-19T13:34:00.000+03:002006-04-19T13:47:05.920+03:00

This is going to be a blog about free schematics, diagrams and various circuits that we find on the Internet. You are welcome to send your own schematics and also comment on the existing ones. Remember to always be careful when you try to build the circuits, and take all neccessary precautions when working with electric currents and voltages.If you like a circuit, build it at your own risk, and

kensaihttp://www.blogger.com/profile/04427561305874817786noreply@blogger.com0