Programming the GPS Disciplined Oscillator (GPSDO) with the QP state machine framework -, which I badly need to write up - has led to the conclusion that I`ve run out of SRAM on the the Arduino Mega 2560 system. Not surprising given that there`s only(!) 8 kB available and I`m programming in C+ with an STL library port, etc. So what to do Well i
Click here to download the full size of the above Circuit.
t would seem that Andy Brown - andybrown. me. uk - again provides the solution with his 512 kB SRAM expansion for the Arduino Mega. Either he`s omniscient or, more likely, he`s "been there and done that!" However I want to be able to mount everything and a board sticking off the side - as detailed in Andy`s design - doesn`t meet the need. So I`ve re-laid out the SRAM memory expansion to be an Arduino Mega sized expansion board. Figure 1 shows the modified circuit, exactly the same as the original design but with suitable pin connections for a full Mega shield. Figures 2a and 2b meanwhile are the current design for the shield PCB. I doubt the layout will win any competitions for a PCB layout, but everything is there and now I`m working to get some prototypes made up. I`m looking for a couple of beta (alpha ) testers. If you`re interested in receiving a prototype board - noting that it is a prototype and not at all tested - then let me know! Cost to you will be whatever it costs me on a per board basis, plus postage and handling. Currently it looks likes each board will cost US$10 excluding postage.
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.....
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