Several easy modifications for a Dataq DI-194RS and DI-154RS. There are at least two different styles: the kind that come packaged (shown) and the kind that come as an unpackaged PCB. The unpackaged ones are what you get when you are fortunate enough to get Dataq's free PCB. These instructions cover the packaged 194RS and 154RS only. T
Click here to download the full size of the above Circuit.
he unpackaged version has a completely different power section and is marked "DI194 Rev G" on the PCB, while the packaged model is marked "DI194/154 Rev G". The mods shown here are independent of each other so make as few or as many as you like. No special tools are needed for any of these mods. The modifications outlined below include: Why convert channels to unipolar Because any sensor that you are using that is based on a bridge circuit only needs a unipolar input and you'll double your converter resolution by going to unipolar. Loadcells, strain gages and pressure sensors are all examples of bridge based sensors that will benefit from unipolar conversion. There are instructions on calibrating the Dataq when used with a loadcell at Calibrating an SGA01 with a Dataq DI-154RS or DI-194RS. Below is a schematic outlining the modifications. You can also download it and view it with ExpressPCB schematics. Dataq also has a decent schematic you can view that shows the entire DI-194RS circuit minus the RS232 transmit/receive level-translation/buffer circuit. Notice R24 (black surface mount resistor) right below the grey potentiometer. We'll remove R24 in a moment. R1 (light blue surface mount resistor) is upside down at the lower right. Step 2. To convert a channel from ±10V bipolar input to 0-10V unipolar input, one resistor per channel has to be removed. In the picture above, R1 is removed to make channel 1...
This project fits more for custom made battery casing that can have more space to hide things inside. This switch with few alterations can be used for any other project as well but is designed based on e-bike needs! This project use a clever functionality of....
The circuit described here uses ultrasonic oscillations and operates based on the propagation velocity of these oscillations in the air. Thus, we can easily determine the distance of two points if the time within which the wave travels this distance is....
Sometimes the precious metals are hidden too deep and are not detected except with complicated devices. In many cases, however, small pieces of precious metal buried near the surface can be detected by relatively simple means. Everyone is very attractive to....
Many times for various reasons we forget or can not water the plants that we have in our homes. And many humidity sensors units just notify us with a beeping sound or with a flashing light, that the pot needs watering. But what if we are away from home? This....
The principle behind a metal detector is really very simple. Proof of this is the circuit that follows, in which it proves that the construction of a metal detector can be done in the minute, with few components that we find very easily everywhere. With the....
The sub-harmonic bass generator is a sound producing unit for guitars. The sound it produces looks very much like that of the bass guitar. The octave generator is sometimes quite unusual since it does not produce any of the usual ways of coloring the sound,....
In the past the sounding (sea bottom measurement) was done with the "bullet", that is, with a heavy lead object that the seamen plucked into the sea hung from a calibrated rope. As soon as the "bullet" reached the bottom, the depth appeared directly from the....
This Amplifier was designed to have the following specifications: Distortion less than 0.1% at full power of 100W even at 20KHz. Power has to be attributed to an extended bandwidth. The output transistors must be protected against short circuits. The power....
A series of LEDs serve to alert the gardener when plants need water. Using two conventional digital integrated LEDs and a series of LEDs, we make a very useful device for gardening. The device detects the amount of water in the pot and alerts the grower.....
characters left: