Ready-made counters, panel meters and time relays from company Trumeter significantly simplify development of applications where we need such modules. Trumeter modules feature one common factor – ready-made solution with very low power consumption and an excellent price/ performance ratio. Many types are battery powered, that´s why they can be easily implemented even in mobile …
The AD9837 is a low power, programmable waveform generator IC capable of producing sine, triangular, and square wave outputs. Below is a circuit design to build your own function generator. The circuit can be connected to a microcontroller through a 3 wire serial interface to set the registers in the waveform generator IC. Package it …
The idea Ardusumo is a universal platform to build robots on wheels that can move around avoiding obstacles using infrared sensors and follow routes marked with dark lines on a white background. We have created Ardusumo to bring young students to the world of robotics: if suitably programmed, Ardusumo allows robots to perform various autonomous …
Ardusumo: an Open Source Platform for Fighting Robots Read More »
Common methods of reverse-voltage protection employ diodes to prevent damage to a circuit. In one approach, a series diode allows current to flow only if the correct polarity is applied (Figure 1). You can also use a diode bridge to rectify the input so that your circuit always receives the correct polarity (Figure 2). The …
Simple reverse-polarity-protection circuit has no voltage drop Read More »
In the last weeks I followed an idea to measure current without the need to cut the wires or even open a pcb trace. The solution i came up with is a hall effect based measurement. I wrote some more about it in an article here: http://avrs-at-leipzig.de/dokuwiki/en/prokekte/fluxprobe If you do not like to open the …
Building a current / flux probe for contactless measurements Read More »
Usually you use eagle to design your printed circuit boards (PCBs) only in 2 dimensions (when not considering the layers as 3rd layer). This gives you some headaches for narrow space designs like in small cases. The common solution until now is to export your board with eagle Up and assemble it with a case …
A typical 3 ½ or 4 ½ multi meter can measure voltage in the low mV range and current in the low mA range. Voltage measurement in the µV range and current measurement in the nA range are typically only available in the more expensive lab bench multi meters. In this post, I will show …
Precision Voltage Adapter For Low Voltage Measurement Read More »
Here is what… I love camping – which means that in the summer i find time to go camp somewhere with my friends, usually in the middle of nowhere, get a fire going, grill sausages and play the guitar. But when the night falls, we need light. Full moon cannot be considered as a sufficient …
High Efficiency Battery Boost Regulator using the MCP1640 Read More »
As mentioned in an earlier post I’ll try to do one small PCB project every week and then send for PCB’s of it every Monday. This weeks PAW will be extremely simple – it’s not even a breakout board, but it might still come in handy for people making PCBs. The Fit Hole is a …
What I came up with is the Lira. It is, as you will see, little more than a breakout board for the ATmega328, but it provides all the bare necessities like voltage regulation, basic power conditioning and an FTDI programming interface. It’s the smallest, simplest, cheapest design I could come up with that still uses …
Lira: A Barebones, Low-Cost, Arduino Compatible Atmega328 Breakout Board Read More »
