Published in issue , December Order from ElektorPCB, bare, April 16, PUBLISHED. in Elektor magazine | December | Find it here. If your OBD2-Analyser NG is equipped with the optional Bluetooth module published in the April issue of the Elektor magazine, you even. Elektor at the core is a cheerful conglo- brought to you by Circuit Cellar, Elektor April AUS$ – NZ$ – SAR £

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Check the updates for details and more features. After this the LED should start blinking. The reference voltage for the sixth sensor, which is attached to the cold domestic water line cold-cold, CCis somewhat lower and is buffered by U5a. An ATmega microcontroller constantly acquires temperature data from the two sensors.

U5b acts as an impedance converter elwktor minimise the load on the voltage divider. However, the software supports different operation modes providing much more than a mere emulator. U6a and U6b are also wired as comparators for signals from the temperature sensors for hot and cold domestic water. For example, the resistance avri, a KT sensor is approximately 1.

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Heating System Monitor Measuring principle Here we used a different method to determine the flow velocity. In this article we describe a relatively easy way to check these values and monitor your consumption almost continuously. Opamp U7d is wired as a comparator and triggers an interrupt in the ATmega microcontroller via pin PB1 when the supply line temperature rises. Simple recipes Farm tools and mechanisms For lovers of travel. Schottky diode D9 prevents unallowable negative input levels on U7d when the circuit is not connected to a power source.

To do that, type “1e1u” or “1e2u” while the HHEmu window is active. TV Elektor Ethics Back to top. This way you can see elektir which function is involved if a problem arises. Follow project Add a comment. If you wish, you can solder the leads to the back of the board when you fit the board in the enclosure later on. That is enough for the emulator mode.


Warning for HHEmu V2. 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.

If you want to know more about factors that may affect the measurement accuracy, you will wlektor a worksheet in the download file for this project.

Then rotate the trimpot back in the other direction until the LED starts blinking or goes dark. If 00 is given, negative response codes are switched off. I keep them here as long as I do not make a new release with full source code.

The project main page just contains the old files for HHEmu V2. It starts at the temperature sensors connected to the circuit board, which are NTC silicon devices. Free online library on electronics Elektor Electronics magazine.

Eldktor is because some systems have constant hot water circulation so users can draw hot water from the tap immediately.

De : Ton Giesberts – p 7 | Elektor Magazine

If the Verify and Write buttons are not active after you press the Bootload button on the Maintenance tab, swap the two lines of the RS bus. The boot loader can be downloaded from the Elektor website [2] ; alternatively, you can purchase a pre-programmed microcontroller from the Elektor Shop.

The time delay between the signals from a pair of sensors is determined by a correlation algorithm in the signal processing software, which shifts the signal waveforms from the two supply line sensors relative to each other until they virtually overlap. The bistable relay K1 is driven by T1 and T2. That is much more than you would see in a real vehicle. The R and R2 sensor signals are also applied avgil the inputs of a differential amplifier built around U7a, and the resulting difference signal is amplified by a factor of We make use of the fact that the supply and return temperatures always vary by at least one to two degrees elektot to the operation of the control system.


Of which some steps can be omitted if a Raspberry Pi 3 with built-in Bluetooth is used. Possible codes are 10, 11, 12, 21, 22, 78 value is interpreted as hex. Free package of programs to work with pdf and djvu files can be downloaded here. Reprogramming a few fuses is necessary to enable the boot loader to work properly, but first you should study the microcontroller data sheet carefully. That allows to display 8 menu lines at once. Published in issueDecember The main reason for that is the main-loop of the firmware that is a busy-wait-loop running at full speed on a PC consuming all CPU cycles of a single core.

Despite your best efforts to economise on heating, they list tidy sums for electricity or gas consumption. All you need in order to determine how much heat your system delivers is four temperature sensors, a bit of wiring, and a microcontroller. Hot water please If the heating system is also used to supply hot water for domestic use, additional pipes are used for this purpose. In case of circuits connected to the AC powerline, the usual safety regulations must be observed.

Firmware Update and Emulator for OBD2-Analyser NG / Wireless OBD2

This means that the ATmega can spend most of its time in power-down mode. Naturally, the corresponding driver must also be installed on the PC before you can use the adapter.

The accuracy of the measurements can be improved by applying some thermal paste between the sensor avirl the heating pipe. This costs electricity to power the pump, and energy is also lost through the pipe walls.

Next rotate each of the trimpots in turn fully in the opposite direction; rlektor LED should light up. Here C28 and R61 form a high-pass filter that more or less allows only changes in the signal level to pass.

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