connect one 0.1 uF capacitor | Microcontroller › 8051 › Garbage values on LCD (16×2) with change in speed of DC motor › connect one 0.1 uF capacitor May 14, 2017 at 12:32 pm #14600 Ashutosh BhattParticipant connect one 0.1 uF capacitor very near to Vcc pin of 8051 micro controller connect free wheeling diode (FWD) accross motor pins. if this wont help. search on google for EMI protection
