{"id":17032,"date":"2026-03-16T15:26:55","date_gmt":"2026-03-16T07:26:55","guid":{"rendered":"https:\/\/www.rocketscream.com\/blog\/?post_type=product&p=17032"},"modified":"2026-03-16T20:22:39","modified_gmt":"2026-03-16T12:22:39","slug":"mini-ultra-pro-v4-without-radio","status":"publish","type":"product","link":"https:\/\/www.rocketscream.com\/blog\/product\/mini-ultra-pro-v4-without-radio\/","title":{"rendered":"Mini Ultra Pro V4 (Without Radio)"},"content":{"rendered":"

Version 4 of Mini Ultra Pro! The semiconductor part shortage has drive us to revise the design to accept either a BQ24074<\/a> or BQ24075T<\/a> PMIC. Both are similar PMIC but only differ in certain aspect (read below). The board has been upgraded to a 4-layer PCB for better RF and noise performance. However, parts price has increased generally across the board due to the never ending semiconductor parts shortage. Note: Current PMIC is BQ24074<\/strong><\/p>\n

Note: There’s a mistake on the silkscreen marking on A4, A5, and A0. These should be A3, A4 & A5 just like V3.<\/strong><\/p>\n

This is our low power rendition of the Arduino Zero! We hit the limit (program flash, memory) on a custom board based on our beloved\u00a0Mini Ultra 8 MHz<\/a> board while doing a custom project for a client. As much as we want to make an ATMega2560 version of the Mini Ultra, the chip size (TQFP100) is just awfully too big for our liking and the price is unreasonable for an 8-bit microcontroller. In contrast, the 32-bit ARM Cortex M0+ ATSAMD21G18A provides plenty of processing power and peripherals at a reasonable cost. For the past 10 years, we have been actively involved in wireless sensor network and Mini Ultra Pro is the result of those hours and hours of developing what works in the field. This version comes WITHOUT<\/strong> the radio transceiver module. Specifications:<\/p>\n