Temperature Control System using LM35

 

This documentation describes the pregnancy of Cytron Technologies DIY (Do It Yourself) Project No.11 (PR11). This visualize bequeath use PIC16F876A to explicit NPN power transistor (BD135) supplementary drive DC brushless fans, LEDs and buzzer when the certain temperature was detected. The value of temperature always displayed on a LCD screen. Circuit schematic and PIC author regulation bequeath be provided.

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BQ24040: Single Cell Li-Ion Battery Charger With Auto Start

The bq2404x series of devices are highly integrated Li-ion linear chargers devices targeted at opening-fragmentary portable applications. The devices rule from either a USB port or AC adapter. The bad input voltage range with input overvoltage lee supports low-tax unregulated adapters. 

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LM3424 Thermal Foldback ? Easy Thermal Control for LED Lighting

Thermal arrangement can be a also significant determinant of number lamp output in rancid-brightness LED designs than the electrical arrangement. LED lifetimes can reduction as temperatures rise, and at rancid enough temperatures, LED efficacy decreases. To difficulty the thermal arrangement challenges, National’s new PowerWise® LM3424 LED driver features thermal foldback which reduces regulated voguish through the LEDs as the temperature increases.

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89Sxx Development Board

There are some 89Sxx gestation board, here is another one. I maintain designed this single rank gestation board to be used as a tool for enlightenment MCS-51 Microcontrollers, and for viable microcontroller believe gestation.

The 89Sxx gestation board features :

• 89Sxx 40-DIL based depiciton , 89S51/52/53
• In System Programming (ISP) through the 6-pin header
• RS-232 and RS-485 serial port (requited pin) for communicating with serial devices like PC
• HD44780 compatible alphanumeric LCD connectivity with backlight artifice
• 4 on-board finesse switch
• 16 average purpose IO port pins on 5×2 header (Port0 and Port2)
• 24Cxx I2C EEPROM
• DS1302 serial Real Time Clock (RTC) with cannonade backup
• On-board supply rectifier and voltage regulator

• Single sided PCB depiciton

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Build your Own PCB Exposure Box with countdown timer

Tired of spending hours and hours in wire soldering? Do your circuits look ugly and you are looking for a means to leash professional-like PCBs? Then you had amend try photoetching. And the pinnacle throb to do that is to hold the improve kit that is an Automated Exposure Box. Moreover if you like tinkering with microcontrollers, here is the challenge and it’s turned occasion you launched the invent of your hold PCB Exposure Box.

Build your Own PCB Exposure Box with countdown timer 

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ProtoShield for Arduino Kit

An yawning -parent prototyping shield for Arduino, the ProtoShield utensils has tons of solidify features to make prototyping on your Arduino manageable. With room for derisory or sizeable breadboards for DIP chips, plus a surface-mount prototyping territory too, you’ll be testing all kinds of imagine ideas in no happening .

ProtoShield for Arduino Kit - [Link]

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Quick Modification to a Tap Light

There’s a black stair well i traverse every night to attain to my apartment. I modified a loud tap-illuminate to be [Tap-> stay on for 40 seconds, then shut off]. The mod takes all of 10 minutes to do, and is really useful if you don’t crave to go back and shut it off.

Quick Modification to a Tap Light - [Link]

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