general:keramikugnsstyrning
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general:keramikugnsstyrning [2020/11/17 18:53] – [RS Online order - 2014-07-31] sunkan | general:keramikugnsstyrning [2020/11/17 18:56] (current) – removed sunkan | ||
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- | ====== Contactor/ | ||
- | Visible on front: 3RT1024-1A..0 \\ | ||
- | Visible on side: EAN 4 011209 291027 \\ | ||
- | Probably this one: \\ | ||
- | Siemens 3RT1024-1AP00 \\ | ||
- | http:// | ||
- | https:// | ||
- | https:// | ||
- | http:// | ||
- | Size S0 \\ | ||
- | Rated control supply voltage Us at 50Hz: 230 | ||
- | |||
- | How much current is needed for A1/A2? 61/230 = 0.265A = 265mA \\ | ||
- | Looks like 61VA max and 7.8VA when closed according to: \\ | ||
- | http:// | ||
- | |||
- | ====== Thermocoule Type S sensor ====== | ||
- | Visible on back of TR 210: Sensor Type S and Alm \\ | ||
- | https:// | ||
- | http:// | ||
- | http:// | ||
- | [http:// | ||
- | [http:// | ||
- | |||
- | ====== Sensor reader ====== | ||
- | Thermocouple-to-Digital, | ||
- | MAX31855SASA+ \\ | ||
- | http:// | ||
- | http:// | ||
- | [http:// | ||
- | http:// | ||
- | http:// | ||
- | |||
- | ====== Relay with RPi ====== | ||
- | http:// | ||
- | G5LA-1 DC5 \\ | ||
- | http:// | ||
- | http:// | ||
- | Trans GP BJT NPN 45V 0.8A 3-Pin TO-92 \\ | ||
- | http:// | ||
- | http:// | ||
- | 1N4004-E3/ | ||
- | http:// | ||
- | |||
- | ===== Maybe diode is not fast enough - it is so no worries ===== | ||
- | Since the rise rate of the current (di/dt) of most systems is very fast (usually fractions of microseconds) " | ||
- | |||
- | ====== Contact and cable ====== | ||
- | AMP 182694-1 \\ | ||
- | Cable outer diameter 7.5mm \\ | ||
- | Cable 10 wires 2 separate shielded for thermocouple sensor \\ | ||
- | Contact inner diameter of dragavlastning 19mm \\ | ||
- | Contact (contact side) outer diameter 21.5mm \\ | ||
- | Lead size, outer diameter 1.5mm core diameter 0.5-0.6mm = 0.20-0.28mm2 | ||
- | |||
- | ====== Possible watchdog timer ====== | ||
- | Spänningsdetektorkrets SOT-23-5, STM6321LWY6F \\ | ||
- | https:// | ||
- | https:// | ||
- | MAX823, MAX824 | ||
- | |||
- | Watchdog-krets DIL-8, MAX813LCPA+ \\ | ||
- | https:// | ||
- | |||
- | WD that stays low until WDI is active MAX691CPE+ \\ | ||
- | https:// | ||
- | |||
- | Interesting but not quite what I want \\ | ||
- | http:// | ||
- | |||
- | ====== Also watchdog in the RPi ====== | ||
- | http:// | ||
- | |||
- | ===== Test with G5NB-1A-E-5VDC relay ===== | ||
- | Elfa 37-071-60 5VDC 200mW - G5NB-1A-E-5VDC \\ | ||
- | Elfa 71-014-58 Transistor TO-92 NPN 45V - BC337-25 \\ | ||
- | Elfa 10-526-25 Likriktardiod DO-41 400V 1A - 1N4004 | ||
- | |||
- | http:// | ||
- | |||
- | Relay: 5 / 125 = 40mA needed \\ | ||
- | BC337-25 100mA - hFE 250 \\ | ||
- | 40mA / 250 = 0.16mA needed for Ib base current \\ | ||
- | 3.3 / 0.16mA = 20625 Ohm | ||
- | |||
- | ===== Test with G4A-1A-E 5VDC relay ===== | ||
- | Relay: 5V / 27.8ohm = 180mA needed \\ | ||
- | 2N4401 150mA - hFE 100 \\ | ||
- | 180mA / 100 = 1.8mA needed for Ib base current \\ | ||
- | 3.6 / 1.8mA = 2k Ohm (2.kOhm turns out to give ~140mA through the spool) \\ | ||
- | http:// | ||
- | |||
- | ===== RS Online order - 2014-07-31 ===== | ||
- | ^ Artikelnummer ^ Antal ^ Enhetspris ^ Varornas värde ^ Produkt ^ | ||
- | | 783-3894 | 1 | 70,12 kr | 70,12 kr | Thermocouple-to-Digital, | ||
- | | 129-1320 | 1 | 29,48 kr | 29,48 kr | TE Connectivity 182649-1, 14 Pole Male Straight Cable Mount Circular Connector, Shell Size 17,Male Contacts | | ||
- | | 452-6657 | 10 | 9,795 kr | 97,95 kr | PIN 1.5-2.5MM GOLD | | ||
- | | 411-438 | 1 | 28,98 kr | 28,98 kr | CPC cable clamp,Shell size 17A | | ||
- | | 683-9065 | 2 | 34,30 kr | 68,60 kr | SPST-NO PCB Mount Non-Latching Relay, 5V dc | | ||
- | |||
- | ====== Logic Threshold Voltage Levels ====== | ||
- | http:// | ||
- | |||
- | ===== More from ELFA ===== | ||
- | Transistor TO-92 NPN 40 V 600 mA, 2N4401 \\ | ||
- | https:// | ||
- | |||
- | ===== Linear PSU ===== | ||
- | 6VAC - 6VA - 2x6V, 0.5A [[https:// | ||
- | [[http:// | ||
- | 4700uF 16V \\ | ||
- | 100uF 16V \\ | ||
- | .1uF ceramic \\ | ||
- | [[http:// | ||
- | Here are some tests - [[LinearPSUTests]] | ||
- | |||
- | ====== Using LT1764A instead ====== | ||
- | ===== Calculating Resitor values ===== | ||
- | < | ||
- | Vout = 1.21(1+R2/ | ||
- | Iadj = 3uA | ||
- | |||
- | R1=3.9k | ||
- | |||
- | Vout = 1.21 + 1.21 * R2/R1 + 3e-6 * R2 | ||
- | Vout - 1.21 = 1.21 * R2/R1 + 3e-6 * R2 | ||
- | R1(Vout - 1.21)/1.21 = R2 + 3e-6 * R2 | ||
- | R1(Vout - 1.21)/1.21 = (1 + 3E-6) * R2 | ||
- | (R1(Vout - 1.21)/ | ||
- | R1(Vout - 1.21)/(1.21 + 3.63E-6) = R2 | ||
- | |||
- | Vout = 4.5 - 1.21, R1 = 3.9k | ||
- | 3.29 * R1/(1.21 + 3.63E-6) = R2 = 10.6k | ||
- | |||
- | Vout = 5.5 - 1.21, R1 = 3.9k | ||
- | 4.29 * R1/(1.21 + 3.63E-6) = R2 = 13.8k | ||
- | </ | ||
- | |||
- | ===== How to get 10.6k - 13.8k with 26k trimpot? ===== | ||
- | Assume trimpot goes between 2.6k - 26k (not from zero) | ||
- | < | ||
- | 13.8k-10.6k = 3.2k | ||
- | 8.2k - 5% = 7.8k | ||
- | 13.8k - 7.8k = 6k | ||
- | |||
- | 1/6k-1/26k = 1/X | ||
- | X = 7.8k | ||
- | </ | ||
- | Use 8.2k E12 value (will get 6.2k trimpot) | ||
- | |||
- | So R1 = 3.9k, R2 = 8.2k + 26k || 8.2k |
general/keramikugnsstyrning.1605639192.txt.gz · Last modified: 2020/11/17 18:53 by sunkan