Differences

This shows you the differences between two versions of the page.

--- power_switch [2014/01/17 21:32] – [Buildup of PCB] breaker27
+++ power_switch [2015/11/15 20:57] – [Modification of RFM12 power pin (PCB < V1.1)] breaker27
@@ Line 3: / Line 3: @@
 ===== Needed Parts and PCB =====
-You need a **PCB**. You may use the layout from [[https://github.com/breaker27/smarthomatic/tree/develop/hardware/power_switch_1|Github]] and etch it yourself or [[https://www.smarthomatic.com/shop/|order]] the PCB or a complete kit.
+You need a **PCB**. You may use the layout from [[https://github.com/breaker27/smarthomatic/tree/develop/hardware/power_switch_1|Github]] and etch it yourself or [[https://www.smarthomatic.org/shop/|order]] the PCB or a complete kit.
 ==== Partlist (in buildup order) ====
@@ Line 20: / Line 20: @@
 |    1     | Connector 1 pin header (for serial TX debugging)  | JP5        |  {{ parts:connector_pinheader.jpg }}   |
 |    1     | Capacitor 10µF                          | C1         |  {{ parts:capacitor_10uf.jpg }}        |
+|    1     | Capacitor 1µF                           | C2         |  {{ parts:capacitor_220nf.jpg }}       |
 |    1     | IC ATMega328                            | IC1        |  {{ parts:atmega.jpg }}                |
 |    1     | Relay FTR-K1C (230V, 16A)               | K1         |  {{ parts:relay_ftr_k1c.jpg }}         |
@@ Line 56: / Line 57: @@
 describe it...
+===== Modification of RFM12 power pin (PCB < V1.1) =====
+In PCBs >= V1.1, the RFM12 power pin is connected to an ATMega I/O pin to make it possible to restart the transceiver if communication fails.
+If you want to modify your old PCB version to have this feature as well, cut two traces carefully (marked red in the picture) and connect two pins of the RFM transceiver to the ATMega (marked green in the picture).
+{{:powerswitch_v1_mod.jpg?500|}}