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Both need additional shared libraries to run.
Their resistance varies by around 0. These two opamps can pull port pin PD7 or PB0 respectively to approximately 0. Metering, adjustment, matching Antennas. Articles for builders and handymans Basics of first aid Basics of life safety Big encyclopedia for children and adults Biographies of famous scientists Children’s science laboratory Factory technology at home.
This yields the formula:. See the command summary in chapter 2. Electronic fuel injection Car. Free online library on electronics. Description of old Files in the Attachments Section Check the latest project update to download the latest version of the firmware and the latest version of HHEmu.
However, the main advantage is after repair, since you just need one driving cycle to see if the repair was successful.
That is enough for the emulator mode. The LED should go dark after 5 seconds. U5b acts as an impedance converter to minimise the load on the voltage divider.
Measuring principle Here we used a different method to determine the flow velocity. In this article we describe a elektr easy way to check these values and monitor your consumption almost continuously.
Free Elektor magazine July/August 2010
Directory structure and files are almost identical to the old firmware release v1. This increases the absolute measurement accuracy, since the full output signal amplitude is used. Despite your best efforts to economise on heating, they list tidy sums for electricity or gas consumption. The accuracy of the measurements can be improved by applying some thermal paste between leektor sensor and the heating pipe. Alignment and calibration The first task is to adjust the three trimpots that set the voltage avvril for interrupt trigging.
The firmware update to version 1.
Pololu – Free Elektor magazine July/August
Hot water please If the elektr system is also used to supply hot water for domestic use, additional pipes are used for this purpose. Jumper JP3 must be fitted if the circuit is connected to the end of the RS bus.
If 00 is given, negative response codes are switched off. This way you can see exactly which function is involved if a problem arises. The TL used here is a rail-to-rail opamp, so the output voltage can assume almost any value within the supply elektpr range.
If you want to know more about factors that may affect the measurement accuracy, you will find a worksheet in the download file for this project. Warning for HHEmu prior V2. Internal pull-up resistors in the microcontroller generate the high level.
Follow project Add a comment. The LED is lit constantly 20110 an interrupt pin is active; otherwise it blinks or is dark. Usually you can tell how much energy your heating system has consumed by checking your utilities bill, but what if you want to know how much heat it actually delivered? It slektor rated for only relatively low voltages eleltor currents.
For this reason, the PCB designed by the author includes inputs for additional temperature sensors. 210 the sensors have been connected to the board, the initial temperature curves as yet uncalibrated should appear in the PC program. Warning for HHEmu V2. Then enter the Bluetooth menu. In these versions a short pause has been inserted into the busy-wait-loop of the firmware that reduces the strain inflicted on the CPU core significantly.
Under certain conditions, controlling the circulation pump can save you a lot of money and significantly reduce CO 2 emissions. This means avrio the ATmega can spend most of its time in power-down mode. By contrast, three-way valves between the two sensor locations are not a problem as long as they are closed while measurements are being made. The R and R2 sensor signals are also applied to the inputs of a differential amplifier built around U7a, and the resulting difference signal is amplified by a factor of I keep them here as long as I do not make a new release with full source code.