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Microprocessor Tutorials - 8085 Microprocessor Tutorial Resource - 8085A Reference Set - Electronics Hobby Projects. Frequently Asked Questions - 8052.com. Links - 8052.com. Frequency counter with PIC and 4- to 5-digit LED display. This document describes the construction of small frequency counter with a cheap PIC microcontroller and a few seven-segment LED digits. The main features of the frequency counter are: frequency range 1 Hz ... 50 MHz (prototype worked up to 60 MHz but this exceeds the PIC's timing specifications) four or five digits resolution (display for example x.xxx kHz, x.xxx MHz, or xx.xx MHz); or 6 digits with F8FII's modification automatic range switching with different gate times optional addition or subtraction of a frequency offset (programmable) optional preamplifier for the input signal can be built on a single-sided 'breadboard-style' circuit board firmware available for common-cathode as well as commom-anode displays very low component count: a PIC 16F628, 4 or 5 7-segment LED displays, a 4- or 20-MHz crystal and a few resistors, optionally one transistor and a few diodes to drive the 5th digit, optionally one other transistor for the preamplifier.

Contents of this document: V. Plantduino Greenhouse. UPDATE 7/9/11: The AC power fed relay has been replaced with a DC battery fed relay system as shown in step 10. UPDATE: We have been selected as finalists in the microcontroller contest! Thank you for voting and rating. Thank you also for all the feedback on the safety of out relay system. We hope the new instructions are clear. We will be continually updating as we make progress on the new design. Hello Everyone! My name is Clover and I am in love with vascular plants and robots. This summer I wanted to combine my two loves of plant science and engineering.

I have constructed an automated watering and temperature system. This is my first project using an Arduino so I am using wonderful articles from MAKE and Instructables as very helpful templates. Data acquisition and control system - Мозилин фајерфокс (Mozilla Firefox) In this section, we will discuss the practicle issues og ADC0804 and Signal control on ADC0804. Then we will move to the interfacing of ADC0804 with microcontroller. Signal control on ADC0804 1. Make CS = 0 and send a L-to-H pulse to pin WR to start the conversion. 2. Keep monitoring the INTR pin. Note: CS is set to low for both RD and WR pulses. Write a program to monitor the INTR pin and bring the digital input value into register A. Example of ADC Application Temperature detection A temperature sensor (LM34 or LM35) is interfaced to the 8051 via an ADC (ADC0804) The output voltage from the LM34/LM35 is linearly proportional to the measuring temperature The ADC0804 converts the output voltages from the LM34/LM35 into digital signals, which correspond to the measured temperature.They are then handled by the 8051 Interfacing with the LM35 (Temperature Sensor) ADC Application:-

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