Two weeks ago, I published post about Small Relay Box. I made new and more useful version with NC and NO contacts…

Main features:

• All contacts of relays (NC, NO, common) available.
• PCB designed for small KP-45 box.

Component list:

1. Chip capacitor 100uF/16V, package “A” – 3216 (C4, C1)
2. Chip capacitor 100nF/50V, package 0805 (C2, C3)
3. Diode 1N4148, package DO41 (DS)
4. Linear regulator 78M05CDT, package DPAK (IC1)
5. Relay RAYEX RSY-12 (RE1-RE4)
6. IQRF DCTR-52DA + CON-SIM connector (IC3)
7. ULN2803, package SOIC18-WIDE (IC5)
8. FAST-ON connector, spacing 5mm

No software changes required.

Gerber files are attached.

I sent gerber files to Maker Studio. It seems, they have very low prices, so we will se…