Building the IoTaWatt


#1

Hi IoTaWatt community,

I love seeing these projects and I have made quite a few little ESP8266 things now.
I am keen to make up this board as it looks like fun.

Can someone please check my digikey shopping list and tell me if I have any components wrong. I don’t know if anything needs to be a precision component?

Quantity Item Digikey
4 .1uf GCM21BR72A104KA37K/490-8051-1-ND/4380336
4 10uf CL21A106KQCLRNC/1276-2405-1-ND/3890491
1 12K ERJ-6ENF1202V/P12.0KCCT-ND/1746818
3 1K RC0805FR-071KL/311-1.00KCRCT-ND/730391
1 MICROSD_PUSH/PULL 114-00841-68/114-00841-68-1-ND/2187101
1 2.1MMJACKSMT PJ-102A/CP-102A-ND/275425
14 STEREO_SMD SJ-3524-SMT-TR/CP-3524SJCT-ND/669705
2 4.7K RC0805FR-074K7L/311-4.70KCRCT-ND/730876
1 220 ERJ-P06J221V/P220ADCT-ND/525477
14 24 RC0805FR-0727RL/311-27.0CRCT-ND/730726
2 MCP3208 MCP3208-CI-SL/MCP3208-CI-SL-ND/305929
1 VREF_SHUNT ADR510ARTZ-REEL7/ADR510ARTZ-REEL7CT-ND/820440
1 PCF8523_RTC PCF8523T-1118/568-5306-1-ND/2530784
1 NodeMCU 1.0 ESP8266
4 TVS_4CHAN_ARRAYSC-74 D5V0P4UR6SO-7/D5V0P4UR6SO-7DICT-ND/6052574
1 CR1220SMD BC501SM/BC501SM-ND/2439260
1 LM358_DUAL_OP-AMP LM358AMX-NOPB/LM358AMX-NOPBDKR-ND/1847269
1 LED_RT_TRH 67-2237-ND
1 32Khz CRYSTAL_8X3.8 CM250C32000AZFT/300-8744-1-ND/2108136

Cant wait to get into the source code (Need MQTT) and integrate with Home Assistant.

Thanks

Dan


#2

I can’t really spend the time to review and research part numbers, but safe to say that I use a 0.2% voltage reference shunt and 0.5% resistors pretty much throughout.