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power_switch [2024/05/20 19:12] – [Modification of RFM12 power pin (PCB < V1.1)] breaker27power_switch [2025/07/12 20:26] (current) – [Partlist (in buildup order)] breaker27
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 ^  Amount  ^               Part                      ^  Placing   ^             Picture                    ^ ^  Amount  ^               Part                      ^  Placing   ^             Picture                    ^
-|    1     | PCB Power Switch 1                      |            |  {{ parts:pcb_power_switch.jpg }}      | +|    1     | PCB Power Switch 1                      |            |  {{ parts:pcb_power_switch.jpg }}  | 
-|    2     | Diode 1N4148                            | D1, D2     |  {{ parts:diode_1n4148.jpg }}          | +|    2     | Diode 1N4148                            | D1, D2     |  {{ parts:diode_1n4148.jpg }}      | 
-|    2     | Resistor 560R green-blue-brown          | R1, R2     |  {{ parts:resistor_560r.jpg }}         | +|    2     | Resistor 560R green-blue-brown          | R1, R2, R6 |  {{ parts:resistor_560r.jpg }}     | 
-|    1     | Resistor 1M brown-black-green           | R3         |  {{ parts:resistor_1m.jpg }}           | +|    1     | Resistor 1M brown-black-green           | R3         |  {{ parts:resistor_1m.jpg }}       | 
-|    1     | IC holder                               | IC1        |  {{ parts:ic_holder.jpg }}             | +|    2     | Resistor 22k red-red-orange (optional for battery voltage measurement)       | R4         |  {{ parts:resistor_22k.jpg }}         | 
-|    1     | Voltage regulator LP2950Z               | IC3        |  {{ parts:ic_lp2950z.jpg }}            | +|    2     | Resistor 39k orange-white-orange (optional for battery voltage measurement)  | R5         |  {{ parts:resistor_39k.jpg }}         | 
-|    1     | Transistor BC547C                       | T1         |  {{ parts:transistor_bc547c.jpg }}     | +|    1     | IC holder                               | IC1        |  {{ parts:ic_holder.jpg }}         | 
-|    1     | LED 2mA                                 | LED1       |  {{ parts:led_yellow.jpg }}            |+|    1     | Voltage regulator LP2950Z               | IC3        |  {{ parts:ic_lp2950z.jpg }}        | 
 +|    1     | Transistor BC547C                       | T1         |  {{ parts:transistor_bc547c.jpg }} | 
 +|    1     | Transistor BC327                        | Q1         |  {{ parts:transistor_bc327.jpg }} | 
 +|    1     | LED 2mA                                 | LED1       |  {{ parts:led_yellow.jpg }}        |
 |    1     | Connector AVR ISP 6pin angled           | JP1        |  {{ parts:connector_isp_angled.jpg }}  | |    1     | Connector AVR ISP 6pin angled           | JP1        |  {{ parts:connector_isp_angled.jpg }}  |
 |    1     | Connector Switched Output 3pin          | X1         |  {{ parts:connector_clamp_3pin.jpg }}  | |    1     | Connector Switched Output 3pin          | X1         |  {{ parts:connector_clamp_3pin.jpg }}  |
-|    1     | Connector 1 pin header (for serial TX debugging)  | JP5        |  {{ parts:connector_pinheader.jpg }}   | +|    1     | Connector 1 pin header (for serial TX debugging)  | JP5 | {{ parts:connector_pinheader.jpg }} | 
-|    1     | Capacitor 10µF                          | C1         |  {{ parts:capacitor_10uf.jpg }}        | +|    1     | Capacitor 100µF                         | C1, C2     |  {{ parts:capacitor_10uf.jpg }}    | 
-|    1     | Capacitor 1µF                           | C2         |  {{ parts:capacitor_220nf.jpg }}       | +|    1     | Capacitor 2,2µF                         | C3         |  {{ parts:capacitor_220nf.jpg }}   | 
-|    1     | IC ATMega328                            | IC1        |  {{ parts:atmega.jpg }}                | +|    1     | IC ATMega328                            | IC1        |  {{ parts:atmega.jpg }}            | 
-|    1     | Relay FTR-K1C (230V, 16A)               | K1         |  {{ parts:relay_ftr_k1c.jpg }}         | +|    1     | Relay FTR-K1C (230V, 16A)               | K1         |  {{ parts:relay_ftr_k1c.jpg }}     | 
-|    1     | Transceiver PCB RFM12B                  | IC2        |  {{ parts:ic_rfm12b.jpg }}             | +|    1     | Transceiver PCB RFM12B                  | IC2        |  {{ parts:ic_rfm12b.jpg }}         | 
-|    1     | Antenna (82,2mm wire)                   |            |  {{ parts:antenna.jpg }}               |+|    1     | Antenna (82,2mm wire)                   |            |  {{ parts:antenna.jpg }}           |
  
 maybe extra pins, at your opinion. maybe extra pins, at your opinion.
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   * **RFM12B:** You should also check the voltages first before soldering the module. At the place for the radio module the pad beside the antenna and at the opposite side the third pad should read about 3.3 V. For soldering, read [[rfm12b_soldering|the RFM12B mounting instructions]].   * **RFM12B:** You should also check the voltages first before soldering the module. At the place for the radio module the pad beside the antenna and at the opposite side the third pad should read about 3.3 V. For soldering, read [[rfm12b_soldering|the RFM12B mounting instructions]].
   * **Relais:** If you want to switch high currents, especially at high voltages, it is recommended to solder the wires directly to the relais pins on the bottom of the PCB.   * **Relais:** If you want to switch high currents, especially at high voltages, it is recommended to solder the wires directly to the relais pins on the bottom of the PCB.
 +  * **R4+R5:** The values of the resistors need to be matching your battery voltage so that the voltage measured from the R4+R5 voltage divider is not higher than 3.3V (the maximum voltage the ATmega can measure with its 3.3V power supply). Both values can also be higher to reduce battery consumption (calculate the current using Ohm's law). The values should not be too high, considering the input impedance of the ATMega ADC pins of around 1 MOhm.
  
 {{https://raw.github.com/breaker27/smarthomatic/develop/hardware/power_switch_1/placing.png?500}} {{https://raw.github.com/breaker27/smarthomatic/develop/hardware/power_switch_1/placing.png?500}}
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 ===== Integrate it into a housing ===== ===== Integrate it into a housing =====
  
-describe it...+The PCB can be integrated into a housing to act as a wireless power plug or in other housings as needed to switch other devices.
  
 ===== Modification of RFM12 power pin (PCB V1.0) ===== ===== Modification of RFM12 power pin (PCB V1.0) =====
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 ===== Add battery measurement support (PCB V1.1) ===== ===== Add battery measurement support (PCB V1.1) =====
  
-If you want to add the possibility to measure the battery voltage / percentage, which is a feature supported by PCB V1.2, you can solder the resistors directly to the power pins on the bottom side of the PCB and connect the voltage divider to PC5.+If you want to add the possibility to measure the battery voltage / percentage to PCB V1.1, which is otherwise a new feature of PCB V1.2, you can solder the resistors directly to the power pins at the bottom side of the PCB and connect the voltage divider to PC5.
  
-{{:powerswitch_v11_battery_mod.jpg?500|}}+{{:powerswitch_v11_battery_mod_1.jpg?500|}} 
 +{{:powerswitch_v11_battery_mod_2.jpg?500|}}
power_switch.1716225162.txt.gz · Last modified: 2024/05/20 19:12 by breaker27