A funny name for a simple pcb for a esp32 prototipe, designed to use all i/o as input and output with different configurations
This board is deisgned to imporve the quality of development forgetting the protobard with folating wires and no-contact noise.
The pcb is designed by eagle
The size of the board is 100x100mm perfect to pass as prototype in jlcpb and get it at a low price (around 22$ for 5 boards).
Currently the pcb is designed to fit with esp32 dev kit with 30pins
The pcb.zip file contain the geber file to upload in your favourite pcb manufacturing site
Very well! 🙂 with this configuration you don't have limit, all I/O are ready to use in all the way you can think let's take a look:
If you want you can add a LM2596 DC-DC step down, otherwise you can give 5V directly on OUT+ and OUT-
In the right side there's some 5V spare pins where you can pluc i2c devices or what you want
As you can see there's a GND and a V pin for each input, you can choose the V voltage as you prefer in 5V or 3.3V bridgin one of the the selector in the buttom, or give your own voltage to the V line (this will help cause 3.3V are providev from internal esp32 voltage regulator
Free to choose in wich way you wanna use it, in the past I hade some problem using internal pull up/pull down resistor and this is why I build this board in a first step.
You can provide olso 5V signal to the esp32 adding a zener diode, or a fancy 10K resistor but after don't cry if your esp32 blow up 🤯 furthermore the ground of all two system shuold be connected between
Pull down:
Pull Up
You can give olso direct input of coure in two way, the white one, is more boring, you need a bridge but can be useful if you neet to measure the volatage, for the listless there's olso the red one solution
You can use a zener with resistor for limit the voltage, you can use a capacitor with a resistor for having an external debounce system, but be careful adding a lot of thing or your board become a christmas tree 🎄
Output can be use in three differt way, directly like the input with the same method, you can usa a bridge to measuere the voltage (yellow way) or plug the wire directly before gpio resistance (white way) , if you wanna plug a led you can simply add a resistor in the appropriate space (red way)
If you are not myopic you can see an I or an S near some GPIO, what they mean???
I stand for Only-Input GPIO
S stand for "Safety" that is you can use that output without going to have problems like pwm at the boot
