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oneminutelectronic.blogspot.com

oneminute: TTL to RS232 Converter

http://oneminutelectronic.blogspot.com/2010/02/ttl-to-rs232-converter.html

Insurance policy , about insurance , learn insurance. TTL to RS232 Converter.

oneminutelectronic.blogspot.com

oneminute: IR remote control computer interfacing

http://oneminutelectronic.blogspot.com/2007/09/ir-remote-control-computer-interfacing.html

Insurance policy , about insurance , learn insurance. IR remote control computer interfacing. This article tries to get you some idea how to interface remote controllers to computer. Possible applications could be controlling your computer or controlling your VCR using computer. The circuit can be easily connected to PC parallel port for your experiments. If you are experimenting only with reception, then one good idea might be to connect the receiving part of the circuit to joystick port, because th...

oneminutelectronic.blogspot.com

oneminute: Samsung mobile tips, tricks, secrets

http://oneminutelectronic.blogspot.com/2007/10/samsung-mobile-tips-tricks-secrets.html

Insurance policy , about insurance , learn insurance. Samsung mobile tips, tricks, secrets. Other secret tricks for samsung mobile or cellphone. If you have downloaded corrupted or incompatible Java midlets or other media,. Which are causing problems with the phone, try this. 2767*JAVA# Java Reset and (Deletes all Java Midlets). 2767*MEDIA# Reset Media (Deletes All Sounds and Pics). 2767*CUST# Reset Custom EEPR0M. 2767*FULL# Reset Full EEPR0M (Caution). Note : Not all codes will work with SGH-C100. 9998*...

oneminutelectronic.blogspot.com

oneminute: Telephone Conversation Recorder

http://oneminutelectronic.blogspot.com/2007/09/telephone-conversation-recorder.html

Insurance policy , about insurance , learn insurance. This circuit enables automatic switching-on of the tape recorder when the handset is lifted. The tape recorder gets switched off when the handset is replaced. The signals are suitably attenuated to a level at which they can be recorded using the ‘MIC-IN’ socket of the tape recorder. During on-hook condition, the output from the bridge (48V DC) passes through 12V zener D5 and is applied to the base of transistor T1 via the voltage divider comprising re...

oneminutelectronic.blogspot.com

oneminute: AA Battery Solar Charger

http://oneminutelectronic.blogspot.com/2007/10/aa-battery-solar-charger.html

Insurance policy , about insurance , learn insurance. AA Battery Solar Charger. For higher power solar systems, see the CirKits. Solar charge controller circuit board kits. AA Battery Solar Charger. C) G Forrest Cook 1999. Open Circuit Voltage: about 4.0V. Closed Circuit Current: about 25ma (depending on the solar cell types). Charge Current: 25ma (depending on the solar cell types). Charge Time AA cells: approximately 1 full day of direct sunlight. Since solar cells are current-limited devices, it is po...

oneminutelectronic.blogspot.com

oneminute: RFID GP30 Crossover

http://oneminutelectronic.blogspot.com/2007/09/rfid-gp30-crossover.html

Insurance policy , about insurance , learn insurance. When two or more GP30 OR GP 20 are connected together sharing same DC power supply, sometimes if the DC supply is not clean enough there will be a crossover effect occurred. Crossover effect is when a situation where when we wanted to read the using reader A, but reader B will read the card. The solution is to couple a capacitor across the reader supply.

oneminutelectronic.blogspot.com

oneminute: Simple 5V power supply for digital circuits

http://oneminutelectronic.blogspot.com/2007/09/simple-5v-power-supply-for-digital.html

Insurance policy , about insurance , learn insurance. Simple 5V power supply for digital circuits. Summary of circuit features. Brief description of operation: Gives out well regulated 5V output, output current capability of 100 mA. Circuit protection: Built-in overheating protection shuts down output when regulator IC gets too hot. Circuit complexity: Very simple and easy to build. Circuit performance: Very stable 5V output voltage, reliable operation. Power supply current: Needed output current 5 mA.