No photo available

# 80-116, Alarm Siren Driver Kit (for 8 ohm Horn Speaker)

Produces an incredibly loud (120dB) siren sound, the familiar rise and falling wail. The Zetex SZD100 siren driver is used for reliability. You can power this circuit on any voltage from 4 to 18 volts DC. Low current drain makes this an ideal circuit for battery use, automotive alarms, battery powered burglar alarms and so on. Use with Philmore WP4 or WP7 or similar horn speaker.

# 80-118, 12 bit Data Acquisition System Kit

The circuit, once built, connects to the parallel port of a PC for data input/output. Uses the Maxim 186 IC; collect analog and digital information and store them on the hard drive. Included software can display and interpret the data, provide trends etc. This is a very sophisticated little device and software (good Science Fair stuff too). Manuals and software are zipped on an included diskette. This is for somewhat of a sophisticated user that knows their way around a PC fairly well. Not for beginners. Power with 9 or 12V DC.

# 80-120, Audio to light Modulator Kit

Introduces the optocoupler triac MOC3010 and power triac. Complete electrical isolation between input and audio signal (low voltage circuit) and output light modulation is achieved. Drive the circuit with a 1.2 to 1.5 volt music signal. Operates from 110Volt AC line. Audio input via 3.5mm jack.

# 80-122, ATMEL AVR PIC Programmer Kit (photo shows board only)

The kit is a powerful programmer for the ATMEL AVR series 20-pin and 40 pin EEPROMs, most with SRAM. The series includes AT90-S1200 & S2313 twenty pin and AT90S4414 & S8515 forty pin devices. These low power CMOS devices feature flash memory, non-volatile EEPROM, as well as fuses and lock bits and RISC architecture. Electrically erasable, they may be programmed over and over again. (Data sheets available at www.Atmel.com) This programmer has a serial port for connection to a PC. No special software needed, any terminal emulator program that can send an ASCII text file will work (or download the FREE  “term.exe”, info included). The PCB will accommodate ZIF (zero insertion force) programming sockets (not incl.) if you wish to add them. Power with a nonregulated 12VDC AC wall adaptor @ about 150mA (which should run about 16VDC with no load).

# 80-123 ATMEL® microcontroller Programmer Kit (photo shows board only)

The kit is a complete and powerful programmer for the ATMEL 8051 family of microcontrollers. This series of ATMEL devices uses flash memory to store programs; Which means that they are electronically erased/programmed without need of a U/V eraser. The 89(L)S8252 chips even have EEPROM which can also be programmed with this kit. The programmer supports the following ATMEL devices 89C1051, 89C3051, 89C4051, 89C51 89LV52, 89C55, 89LV55, 89S8252, 89LS8252,,,89S53,8953. Programmer automatically reads a chip’s signature bytes so that you may just plug in any of the series and go! Device instructions and all ATMEL device fuse and lock bites are also programmable with this Programmer. USE: Connects to the RS232 serial port of any PC. Connect using any terminal emulator program capable of ASCII text file transfer, such as Windows terminal, Windows 95/98 Hyperterminal or DOS Texix, ProComm etc. A simple DOS terminal program which we use TERM.EXE is a free download. Power: 16VDC use an unregulated 12V 150mA wall adaptor which will put out about 16VDC when no load.

# 80-124, Positive Adjustable Power Supply Module Kit
# 80-125, Negative Adjustable Power Supply Module Kit

These two kits can be used separately; or assembled together to create a dual rail power supply. Current up to 1.5ampere output. Both kits feature; reverse polarity protection, LED power "on" indicator, IC regulator, variable output voltage, low noise, AC or DC input and up to 37 volts output. Complete details for selecting a transformer (transformer is not included; you must supply input voltage of 3 volts more than desired output) are included. A thorough description of assembly options is included with each kit.

# 80-126, Mini-VOX Relay Kit (Sound Activated Switch)

For the uninitiated, VOX = Voice Activated Switch. This is a switch (relay) that may be activated with any sound, including the human voice. A very sensitive circuit that may be adjusted to react to very low volume sounds or a yell or hand clap. While a VOX is often used to activate a sound recorder, it may be used to trigger an alarm (the mike easily picks up vibrations in windows, wall or door), activate a video camera, radio transmitter or simply turn on a light. The relay will release after a few seconds of silence, holding as long as sound continues. (Hold time may be changed up to 30 seconds) Operates on 12V DC and very low current.

# 80-129, 4 Digit Up/Down Counter Kit

The kit is a low cost counter, counting from 0000 to 9,999 or down from 9,999 to 0000. The overflow output pulses low when the count wraps to zero; so, two counters could be connected together to make an eight digit counter. The clock input is debounced to prevent problems when using external mechanical switches. Operation on anywhere from 9 to 15 volts DC and 20 to 40 mA (depends upon how many display segments are lighted). The AT90s1200 is preprogrammed; builder is not required to program anything. There are five pairs of pins for external connections: RESET, CLOCK, DOWN, DISABLE, OVERFLOW. A Down connection sets the unit to count down. A Disable prevents counting at all; Resets sets the counter at zero (0000), Overflow outputs a pulse low when the counter reaches 0000. The Clock contact will pulse a ‘count’, and each time a switch connected to Clock is ‘on’ the unit increments a digit. The maximum speed of counting is a bit more than thirty per second. The display is red LED digital 0.6" high.

# 80-130, Sound Activated Switch, for tape recorder Kit (photo shows board only)

Turn on any tape recorder that has a remote on/off jack (most cassettes). The circuit has a feed back and delay circuit for robust operation. You could add a relay for switching heavy loads; and tape recorders are not the limit. How about turning on lights via voice or a whistle? Circuit switches off after six seconds of silence.

# 80-134, Personal Computer Controlled LCD & Thermostat Kit

The LCD screen is just a bonus; you may program it to say about anything, fed from a personal computer. A more interesting use for this kit is the thermostat function. The board may be programmed and then disconnected from the PC to function as a standalone thermostat. Set a high and low temperature and outputs may be used to switch external devices, such as relays controlling heaters or coolers, open windows, etc. Readout may be in Fahrenheit or Celsius. Software is included and detailed instructions for use. The Kit uses the DS1620 chip from Dallas Semiconductor. The chip measures -55 - 125 C

(- 67 - 257 F). You will need a small ‘wall-wart’ style power supply to provide 12V DC @ 50mA or so.

# 80-137, Touch Switch with Relay Kit

The Touch switch may be used to turn on almost anything with a light touch of ‘plate’. The circuit pulls in a relay which remains engaged for anything from five seconds to about a full minute, depending upon you changing just one resistor to set the time amount (default is five seconds). One of the unique features of this circuit is that the touch-plate may be located up to several yards away from the circuit board if necessary. It may also be battery powered if an AC supply is not convenient. An LM555 is used in the heart of the circuit. The relay can handle up to 12A in its contacts. A 12V battery pack or AC power supply is recommended although we’ve used the circuit on an unregulated 9V supply.

# 80-140, 110VAC Strobe Light Kit

Usually more practical than a battery operated strobe, runs on standard house current. The flash rate is adjustable from about one every three seconds to about three per second. Uses are as signal beacon, tradeshow kiosks, discos, etc. Very bright flash can be seen for miles at night, Like those on airplanes. AC cord and plug not included. (Beginners should be supervised when working with house current.)