This is our second article in the series we continue to provide control shield circuits (outputs) for relays and other loads, perfectly isolated from the microcontroller through optical coupling. The coupling can be done simply with LED or lamp and sensor, or even using integrated couplers.
Read more: Insulated Shields with Optical Coupling I (MIC023E)
One of the most interesting applications with microcontrollers is the creation of electronic games. Many readers who are looking for a good project for their graduation work, or simply want to do something different with a microcontroller, certainly think about doing some kind of game. Over the years we have published hundreds of electronic games using technologies of all times. Well, most of the games which we publish can be elaborated nowadays with microcontrollers in modern versions and with more resources. In this article we will deal with this subject.
In the first two articles of this series, we have given a lot of circuits, which we have on our site and in our files (many not yet inserted in the site), that work as shields for microcontrollers, either using them directly or even with minor adaptations . We continue with a good amount of them.
In the previous article (MIC019E), we selected several circuits published in our website which can be used as shields for microcontrollers of all types. The circuits can be used directly, or they require small adaptations which depend on the microcontroller used and also the design. In this article we continue giving some more interesting circuits.
A lot of circuits which we have published over the years as building blocks (as they were called at the time) or simply to use independently, today can be adapted to operate as shields of microcontrollers. In this article we have put some that we have selected in our vast stock of circuits, more than 13,000 currently and which are gradually being placed on the website.
The circuit shown in Figure 1 turns off a load after a time elapses from the moment its power is established. This period depends on the time constant of the RC circuit formed by the potentiometer P1, resistor R1 and the capacitor C1 which can have values of up to 2 200 uF.
This circuit uses a sensitive reed relay to control external loads. The time delay is given by the...
This circuit was found in an old publication about transistor. The original trasistors are...
This conventional astable uses two NPN transistor and was found in a publication of the year 1968. The...
This basic configuration of an astable multivibrator was found in a publication of the year 1968....
This oscillator can run in frequencies up 10 MHz depending on the Power supply voltage. The 1 µF...
This one-digit counter is part f the samples bench of the MultiSIM in one of its versions. The...
This simple timer can be used in many applications such as egg timer. The LED glows up when S1 is...
The circuit shown by the figure below can produce signals in the range between 20 kHz and 30 kHz....