https://www.ti.com/product/MSPM0L1105

Microcontrollers are always kind of interesting to me. Lets see how many others in !technology@lemmy.world are interested in these tiny chips!

Earlier this year, TI has added a number of Cortex-M0+ chips to their lineup. At the absolute bargain-bin is the MSPM0L1105 (of the MSPM0 line). Prices seem to have started coming in at Digikey at ~$1.60 @quantity 1, though TI offers much lower prices in bulk quantities as expected.

The Cortex M0+ is the smallest ARM, lacking many features familiar to desktop or phone users. Its too small to run Linux, but its more of a Arduino competitor. The focus is on the smallest price possible, as well as ease of use for the Electrical Engineer and programmer.

One of the coolest things going on with modern uCs is that OpAmps are being offered as part of the package these days. OpAmps are perhaps the oldest "computers", designed to give the EE an easy-to-use negative feedback loop. OpAmps can implement analog-logic, arithmetic over voltage rather than discrete values like digital enthusiasts are familiar with. The voltage itself is the value, and thus you can multiply, divide, add, subtract, logarithm or exponent, derivative or integrate by just adding resistors, capacitors, or diodes to the correct location on the circuit.

With the 12-bit ADC and an OpAmp (probably most commonly to be used as a filter), this should provide a wide variety of simple applications at very low costs. At 39-cents, this device basically costs the same as another opamp (except this device includes a full blown CPU + ADC Converter).