Infrared Alarm Barrier - This infrared alarm barrier can be used to detect persons passing through doorways, corridors and small gates. The transmitter emits a beam of infrared light which is invisible to the human eye. The buzzer at the output of the receiver is activated when the light beam is interrupted by a person passing through it. infrared __ Designed by Popescu Marian
Infrared Object Counter - This infrared object counter can be installed at the entry gate to count the total number of people entering any venue. For example, it can be used at the railway stations...__ Electronics Projects for You
Infrared Remote Control Timer - The circuit comprises two sections, namely, the transmitter section and the receiver section. Fig.1 shows the IR transmitter section. The astable multivibrator NE555 (IC 1) is used to generate a 10kHz...__ Electronics Projects for You
INSIDER V10 - in-Circuit debugger, created by E. E. Atanasios Melimopoulos. Updated Ver 1r1 __ Designed by Jose Pino
Interface LCD with ease - 04/27/00 EDN Design Ideas: Alphanumeric LCDs find use in various embedded systems. in these systems, µCs often lack i/O resources, so you must make optimum use of the available resources. LCDs have a bus-oriented interfacing structure, which consumes 11 i/O lines (eight data lines and three control lines). You cannot always afford to spare this many i/O lines. Design by Bharat Mehta, Space Applications Center, Ahmedabad, India
Internet Time Display Module for the WIB - Looking for a really accurate clock? This simple add-on board for the WiB (Web Server in A Box) displays the time and date, as gathered from an internet time server. You can use it as a clock you never need to adjust and it can even be configured in the WiB to automatically adjust for daylight saving time.__ SiliconChip
Inverted 555 Timer - Whenever I use the 555 timer, it seems that the output polarity is invariably incorrect, and the way the 555 functions, it normally cannot generate a duty cycle of less than 50% — 90% yes, 10% NO! This inverted 555 circuit generates duty cycles of less than 50%. Everything works the same except for the polarity. Why not simply __ Designed by Jim Keith
Inverting Level-Shift Has Negative Potential - EDN-Design ideas -- 07/24/12 Shift clock logic levels to match the requirements of the driven device. Design by Chun-Fu Lin and Shir-Kuan Lin, National Chiao Tung University, Hsinchu, Taiwan; and Hui-Shun Huang, Jyi-Jinn Chang, and Tai-Shan Liao, National Applied Research Laboratories, Hsinchu, Taiwan
Isolated PWM (5% to 95%) Controller - The LTC6992 is a silicon oscillator with an easy-to-use analog voltage-controlled pulse width modulation (PWM) capability. The LTC6992 is part of the TimerBlox family of versatile silicon timing devices. A single resistor, RSET, programs the LTC6992’s internal master oscillator frequency. The output frequency is determined__ Linear Technology/Analog Devices App Note, Oct 26th 2010
Jogging Timer - 3V Battery powered; Beeps after a fixed minutes delay __ Contact Flavio Dellepiane, fladello @ tin.it
Keep clocks in line with LVDS replicator - 01/06/00 EDN Design Ideas: intended for use in telecommunications and other high-speed data systems, National Semiconductor's DS-92CK16 chip (Picture) allows you to generate multiple copies of clock signals with a channel-to-channel skew of 50 psec. Design by Graham Prophet
Klausmobile Tube Tester - The tester is an entirely analog device controlled by a PCI bus industrial DAC/ADC card. As built, it enabling curve-tracing of small single and dual triodes with indirect heating. Dual triodes can be tested each side separately or both sides in parallel. Full tests of pentodes are possible with an external screen grid supply. The design __ Contact klausmobile @ yahoo.Com
Knight Rider - in the Knight Rider circuit, the 555 is wired as an oscillator. it can be adjusted to give the desired speed for the display. The output of the 555 is directly connected to the input of a Johnson Counter (CD 4017). The input of the counter is called the CLOCK line. __ 555-Timer
Knock Alarm with timer - This is a circuit for a knock alarm that uses a piezoelectric plate to detects vibration due to knocking and activates an alarm for about ten seconds __ Electronics Projects for You
Kojak Siren - Here is a very simple Kojak siren that is built with two 555 timer ICs and has 2 linear potentiometers that allows the control of sound speed and tone. IC 2 produces a sound that can be adjusted with P2 and then drives a small speaker. The amplitude of the signal is modulated by IC 1 with a low frequency signal. The modulation __ Designed by Popescu Marian
Landscape Sprinkler & Drip Timer Project - The timer circuit uses CD4000 series CMOS
logic -no firmware at all. The circuit board was cut to fit where the original circuit board in the Rain Bird Timer had been. The barrier terminal strip was salvaged from the original circuit board (Gates and counters; no microcontroller) __ Designed by Dick Cappels
Lap Counter for Swimming Pools - Do you swim laps to keep in shape? This simple Picaxe-powered counter will keep track of the number of laps you've done__ SiliconChip |