74HC165 to 74HC595 Demo 2 [SPIN]
Another tutorial on using the 74HC165 Parallel to Serial shift register and 74HC595 Serial to Parallel shift register with the P8X32A MCU.
![74HC165 to 74HC595 Demo 2 [SPIN]](https://savagecircuits.com/wp-content/uploads/2014/02/74HC165_74HC595_2_00.jpg)
![74HC165 to 74HC595 Demo 1 [SPIN]](https://savagecircuits.com/wp-content/uploads/2014/02/74HC165_74HC595_1_00.jpg)
74HC165 to 74HC595 Demo 1 [SPIN]
A tutorial on using the 74HC165 Parallel to Serial shift register and 74HC595 Serial to Parallel shift register with the P8X32A MCU.
![74HC595 Demo [SPIN]](https://savagecircuits.com/wp-content/uploads/2014/02/74HC595_00.jpg)
74HC595 Demo [SPIN]
A tutorial on using the 74HC595 Serial to Parallel shift register with the P8X32A MCU.
![74HC165 Demo [SPIN]](https://savagecircuits.com/wp-content/uploads/2014/02/74HC165_00.jpg)
74HC165 Demo [SPIN]
A tutorial on using the 74HC165 Parallel to Serial shift register with the P8X32A MCU.
![RN-42 Bluetooth to PC Demo [P8X32A]](https://savagecircuits.com/wp-content/uploads/2023/07/RN-42_BT_PC_00.gif)
RN-42 Bluetooth to PC Demo [P8X32A]
This demo provides an example of communication between the RN-42 Bluetooth Module and another device capable of supporting Bluetooth SPP, such as a PC or Smartphone.
PIR Triggered Relay Circuits
This tutorial describes how you can turn on a light when motion is detected, just like those outdoor motion-sensing lights do, and all without writing a single line of code.
Relay Driver Circuits
A collection of circuits for driving relays in your projects.
![DS1620 Serial LCD Demo [BS2]](https://savagecircuits.com/wp-content/uploads/2013/04/DS1620_LCD_00.jpg)
DS1620 Serial LCD Demo [BS2]
An example of displaying the day, date and time from a DS1302 and the temperature from a DS1620 on a serial LCD.
Mixed Voltage Systems
This article describes methods for interfacing 5V and 3.3V devices in a world where microcontrollers and various sensors often operate and communicate at different voltages.
![LCD Bar Graph Demo [BS2]](https://savagecircuits.com/wp-content/uploads/2005/10/bargraphs_00.gif)
LCD Bar Graph Demo [BS2]
This tutorial shows how to draw different types of bar graphs on a Parallax 2×16 Serial LCD.
