Not so much a 'creation' as a tool/ offer.
I didn't want to waste space and cost for the programming circuit for Wroom32 on production boards (which use OTA programming after the first programme is loaded) so made a small board for programming in development/ production.
It connects between a 'CP2102 USB 2.0 to TTL UART Module' (I bought mine from AliExpress) and the IO on the wroom32/ ESP32, see pictures. The RTS connection has to have a pin added as it does not have one as supplied.
I had several PCBs made and wondered if they would be of use to anyone else. Let me know if so, you can have one for the price of the postage (additional PCBs at £1, 1GBP each).
They are 20mm x 20mm and the components needed to build the complete 'programmer' are all 1206 SMD, two 470R resistors, two 10K resistors, two BC817-25 transistors and, in rare cases only, a 1uF capacitor.
PM me if you are interested.
I'm also putting together a new Wroom32 development/ production board:
Power: 5V from USB C (power only), 5v via JST2.54 or solder pad, 3.7V for rechargeable battery input, polarity protected >5.5V JST/ Solder
Display: SPI via 8pin 0.5mm or 8pin JST2.54
I/O: DC motor(PWM), relay driver, various GPIO
etc.
Current size is 26mm x 26mm but I'm working on the power arrangements at the moment (how to use on 20/25V without overheating - probably a buck converter) so may increase a bit. PM if you would like to know more.
Pictures of early prototype:
Robin
I didn't want to waste space and cost for the programming circuit for Wroom32 on production boards (which use OTA programming after the first programme is loaded) so made a small board for programming in development/ production.
It connects between a 'CP2102 USB 2.0 to TTL UART Module' (I bought mine from AliExpress) and the IO on the wroom32/ ESP32, see pictures. The RTS connection has to have a pin added as it does not have one as supplied.
I had several PCBs made and wondered if they would be of use to anyone else. Let me know if so, you can have one for the price of the postage (additional PCBs at £1, 1GBP each).
They are 20mm x 20mm and the components needed to build the complete 'programmer' are all 1206 SMD, two 470R resistors, two 10K resistors, two BC817-25 transistors and, in rare cases only, a 1uF capacitor.
PM me if you are interested.
I'm also putting together a new Wroom32 development/ production board:
Power: 5V from USB C (power only), 5v via JST2.54 or solder pad, 3.7V for rechargeable battery input, polarity protected >5.5V JST/ Solder
Display: SPI via 8pin 0.5mm or 8pin JST2.54
I/O: DC motor(PWM), relay driver, various GPIO
etc.
Current size is 26mm x 26mm but I'm working on the power arrangements at the moment (how to use on 20/25V without overheating - probably a buck converter) so may increase a bit. PM if you would like to know more.
Pictures of early prototype:
Robin
