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Programable Board with 32K RAM – Circuit Schematic
Programable Board with 32K RAM
While there is a list of features that I would like to add (32k EEPROM support, line numbers to 65,535, more stack space, strings, arrays, 16 bit variables and ...
GDS Chip Programmer – Circuit Schematic
GDS Chip Programmer
Generic Digital Switches are in-circuit programmable devices made by Lattice Semiconductor that allow pin to pin routing, buffering, and inversion. Perfect for ...
PIC16F877A Astro Clock – Circuit Schematic
PIC16F877A Astro Clock
It has 16 timers that can be independently paused and restarted, and can run forward or backward. There are 16 alarms with configurable sounds and actions. Time...
PWM fan controller with PIC 12F675 – Circuit Schematic
PWM fan controller with PIC 12F675
The temperature sensor U2 needs to be located next to the item being monitored. As the temperature increases the motor duty cycle will increase. D1 and R2 are o...
MAX6953 Development board – Circuit Schematic
MAX6953 Development board
The MAX6953 from Dallas Maxim is a compact cathode-row display driver that interfaces a microprocessor (like PIC or AVR) to four 5x7 dot matrix LED display trou...
Church bell Controller with ATmega32 – Circuit Schematic
Church bell Controller with ATmega32
This circuit is a church bell controller. Basic component is an ATmega32 microcontroller. At the circuit 1 24LC32 eeprom memories is being used. As control I cr...
Digital Function Generator (MEGA16-P) – Circuit Schematic
Digital Function Generator (MEGA16-P)
The function generator features two BNC outputs : one for the high speed [1 to 8 MHz] square signal (BNC1) and another for the DDS signal (BNC2). Offset and amp...
Logic Probe with PIC12F683 – Circuit Schematic
Logic Probe with PIC12F683
This project is based on a probe logic states, capable of measuring levels from TTL (5v) to state levels of PLC's (24v). For this we have employed the use of th...
Digital Thermometer – Circuit Schematic
Digital Thermometer
Room temperature plays a vital role in determining human thermal comfort. This digital thermometer is designed to measure room temperature and display it on a L...
IR auto digital thermostat – Circuit Schematic
IR auto digital thermostat
This circuit measures temperature in Celsius scale and displays it on an alphanumeric LCD screen. When temperature rise to 40 C an alarm is activated and at the...
IR auto digital thermostat – Circuit Schematic
IR auto digital thermostat
This circuit measures temperature in Celsius scale and displays it on an alphanumeric LCD screen. When temperature rise to 40 C an alarm is activated and at the...
89Sxx Development Board – Circuit Schematic
89Sxx Development Board
The hardware block is shown in Figure 1. The MCU is 89Sxx microcontroller. And the complete hardware schematic is shown in Figure 2. Port1 is used as data-bus f...
3-Wire Serial LCD using PIC12F683 – Circuit Schematic
3-Wire Serial LCD using PIC12F683
The character data and command from the microcontroller is transferred serially to a shift register (74HC595), and the parallel output from the shift register ...
MCS08DZ60 Evaluation Board – Circuit Schematic
MCS08DZ60 Evaluation Board
The board has been initially developed to learn with CAN, so a CAN transceiver is available (IC4). The CAN transceiver comes from Maxim, but some other manufact...
Digital clock with thermometer and hygrometer – Circuit Schematic
Digital clock with thermometer and hygrometer
I use a RealTimeClock Maxim DS1305. The RTC backup power is a supercapacitor (0,22F). I test it for 4 weeks, works fine. For this reason it don't have the capa...
PIC clock – Circuit Schematic
PIC clock
The WWVB signal is broadcast as a 60 kHz carrier that is AM modulated with a time code frame that is updated once per minute. The data rate is one bit per secon...
Breadboard header for ATTiny – Circuit Schematic
Breadboard header for ATTiny
This handy breadboard header for ATTiny 25/45/85 microcontroller is a new design based on the original idea from Tinkerlog. Maybe the most useful feature is tha...
PCB Exposure Box with Countdown timer (ATMEGA8) – Circuit Schematic
PCB Exposure Box with Countdown timer (ATMEGA8)
Four blacklight lamps, 15W each, emit radiation at the region of UVA, with a peak around 350nm where the thin surface above the copper of the photosensitive boa...
one wire keypad with PIC16F88 – Circuit Schematic
one wire keypad with PIC16F88
This project can be used for many different purposes. Probably the most used application would be to interface to any electronic project that requires a keypad....
OSCCAL Value Finder Board with 16F88 – Circuit Schematic
OSCCAL Value Finder Board with 16F88
The program loaded in the 12F675 device which has no osccal value will force a pulse on GPIO.4 and it will make a loop while increasing the osccal value interna...