Week 4- Electronic Design

Routing rerouting rerouting

Cecilia Marsicovetere

This week we did some electronic design. This is probably one of my favorite things ever. It takes some patience to do it, but I truly think it's relaxing and calming. For the design, I decide to make a motor driver. My final project will use DC motors, so I thought I could start testing some of the logic. So my deisgn would mostly be two H bridges to move two different DC motors. When making any eelctronic design, the most important thing is to check the datasheet. There truly is nothing as imperative as the datasheet. Back in my undergrad, I had a microcontroller class in which we used the PIC16F887 and programmed in Assembly, and we all printed the datasheet as our textbook. That class truly hammered in the lesson that datasheets are the bible for EE and truly try to live and breathe datasheets.

But I digress. The thing is, I looked up the datasheet for TB67H451FNG driver that I am going to use. I check the connections, but I especially check if it needs any additional components. On page 10, I see it is necesary to calculate a resistor we are going to use to limit the current. Ideally it would be a small resistor, but the exact value is not available. The

This is a list of all the components:

  • 1 - Xiao RP2040 (M1)
  • 9 - 1k Resistor (1206 package) - R1, R2, R3, R6, R7, R9, R10, R11
  • 1 - 100k Resistor (1206 package) - R8 /li>
  • 2 - 0.25 Resistor (2010 package) - R4, R5/li>
  • 2 - H-Bridge driver TB67H451FNG - U1, U2
  • 1 - 100 uF Capacitor - C1/li>
  • 1 - N Channel MOSFET (SOT23) - Q1
  • 1 - 4 Pin Female Header - J1 /li>
  • 1 - 4 Pin Male Header - J5 /li>
  • 1 - Screw Terminal Block 2 POS - J2, J3, J4 /li>
  • 1 - SDPT Slide Switch - SW1 /li>
  • 2 - Push button switch - SW2, SW3 /li>

TO DO: add more inbetween pictures