The 74ls160 family of BCD and binary counters are very useful counters. With the capability of being cascaded together you can have a very effective and simple counter of the bit length for your project. With the counter being extremely fast (up to 125Mhz) and synchronous counting with no ripple carry, it is a very effective counter.
The 74161 and 74163 are standard binary counters while the 74160 and 74162 and BCD counters.
Microchip makes a very cool digital to analog convertor with 10-bit resolution, it is the TC1321. A very nice feature of the DAC is it has a simple two wire I2C interface. This makes interfacing it to other microcontrollers with I2C interfaces very simple. It is only available in 8pin SOIC and MSOP surface mount packages, so be ready for some surface mount soldering.
The LM317 adjustable voltage regulator is by far one of the most versatile regulators ever. If you need a precise voltage somewhere in the range of 1.2 volts to 37 volts, this regulator is for you. A simple resistor network allows you to select the output voltage, and with the capability of driving up to a 500ma load this is one excellent regulator.
The MAX232 is an essential part for anyone working with RS-232 communication. It easily converts serial level voltages to usable TTL level voltages to interface with your microcontrollers or other TTL-level serial devices.
I always have a quantity of these on hand as they seem to end up in almost every project I work on.
The Pic18f2520 is by far one of my favorite PIC microcontrollers. The PIC 18 family has many nice features that you just don’t find in the lower PIC families including PicKit II programmer support.
The PIC18F2520 is available in a 28 pin dip package (as well as QFN and SPDIP) and has many nice hardware features including:
4 Crystal modes plus RC and oscillator support, up to 40Mhz clock source.
High Current Sink/Source 25ma digital i/o.
PWM Outputs.
Built in 10 Bit A/D converters.
Two pin in circuit ICSP programming.
USART / SPI /I2C support.
32K of onboard flash.
It has capability to be programmed with C as well, with a C compiled optimized architecture. With it’s versatility it is one of my favorite PICs for projects that require more i/o and larger program structures than the smaller PIC families can handle.
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