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Today we will build a circuit that detects the interruption of an infrared beam allowing an alarm to be created. The LM358 IC has two comparators. Pin 3 which is the non-inverted end of the voltage comparator is connected to …
Today we will build a small circuit that lets you execute commands in Raspberry Pi to do whatever we want when a button is pressed (in our case to start the shutdown process). This circuit is quite simple and requires …
Using an MCP3008 IC we will add the ability to read analog values on a Raspberry Pi. The Raspberry Pi unlike the Arduinos natively has no way of reading analog data. By adding an integrated as the MCP3008 we can …
Today a circuit will be built using an LM3915 IC and it will visually represent the intensity of an audio signal. The LM3915 has an amplitude of 30 dB and the 10 LEDs are activated in 3 dB intervals. If …
Today a circuit will be built to make a two-tone doorbell. We will use two ICs, one CD4060 which is an oscillator with a 14-step binary counter and a CD4001 that implements 4 NOR ports. The first integrated will divide …
Today we will build two circuits that work as logic probes that inform us of the state of the signal under analysis through LEDs. One circuit uses the IC CD4001 and the other uses the IC CD4011, the first implements …
Today we will build two circuits that, with the help of two integrated chips and some components, allow us to generate random results. Both circuits use a CD4011 IC that implements 4 NAND ports with buffer and a CD4017 IC …
Today we will build a circuit to create a very simple FM transmitter. This circuit like others is well publicized on the Internet and presents a very simple configuration since it only uses an NPN Transistor. Note that this circuit …
Today we will build a circuit to read multiple inputs (buttons or others) using an IC that converts a parallel input into a _output series. The Circuit uses a 74HC165 IC to read the inputs. Pull-up resistors are used in …
Today we will build a circuit that uses the IC 555 along with buttons and resistances to play the 9 musical notes. This circuit has a wave generator 555 configured as an astable multivibrator circuit. This type of operation is …