PIRA 9B10.00 TIMERS

DCS #DEMONSTRATIONREFERENCEABSTRACT
9B10.00Timers
9B10.10spark timerAJP 37(5),563A transistorized spark timer.
9B10.10transistorized spark timerAJP 36(1),60Circuit diagram for a transistorized spark timer.
9B10.10spark timer circuitAJP 48(4),321A complete spark timer circuit.
9B10.10solid state spark timerAJP 40(3),487Another circuit.
9B10.10spark timerAJP 37(3),326A solid state spark timer with five frequencies between 5 and 60 Hz.
9B10.10spark timerAJP 36(7),642Circuit diagram for a simple low cost solid state synchronous spark timer.
9B10.10wide range spark timerAJP 41(5),743Six ranges from 5 to 120 Hz.
9B10.10double sparker for air trackAJP 36(8),761Replace the jumper wire on each cart with a parallel RC combination.
9B10.10spark timer for air trackAJP 40(10),1549A spark timer for the Eduquip air track.
9B10.11spark timer modificationAJP 48(11),989Cenco spark timer modification.
9B10.12spark timerAJP 29(6),367Circuit for a tube based ac spark generator.
9B10.12electronic spark timerAJP 34(6),536A tube based variable frequency spark timer.
9B10.13spark timerAJP 35(6),ixA dc relay combined with a R-C circuit to form a relaxation oscillator.
9B10.14double spark timer - air trackAJP 40(12),1864Plans for a double spark timer for the air track.
9B10.14coincident spark timerAJP 39(5),566A coincident spark timer starts sparking at the manual release of the glider. Improves the first mark timing for impulse experiments.
9B10.14double sparker for air trackAJP 37(10),1065Another double sparker method.
9B10.14double sparker noteAJP 37(4),455Re: AJP 36,761 (1968), recommends a different capacitor.
9B10.14two-glider spark recordsAJP 36(4),ixLeave the air track floating and attach the spark timer across the two wires.
9B10.15continuous spark timer recordAJP 41(6),831The spark timer paper strip is replaced by a rotating cylinder.
9B10.20electric stop clock controlAJP 29(8),498Apparatus Drawings Project No. 20: A system for controlling a timer with photoconductive cells and/or electric contacts.
9B10.20electric timer controlAJP 43(12),1076A circuit for cycle counting and clock control.
9B10.21versatile digital timerAJP 51(2),183An inexpensive hardwired timer based on the 7217A timer chip.
9B10.22sequential timerAJP 46(8),864A timer to sequentially switch many channels into a single channel strip chart recorder.
9B10.23household clock conversionAJP 28(5),507Add a rectifier in parallel with the switch to stop the residual motion of the clock motor.
9B10.24time switch for corridor displayAJP 31(2),132Circuit for a switch with a reset timer that will open after times from a few seconds to ten minutes.
9B10.28lecture room counterAJP 43(11),1017Complete plans and circuit boards for a high speed counter with 22 cm high display.
9B10.30scaler as timerAJP 34(8),ivGate a 100 KHz oscillator to a scaler.
9B10.30scaler becomes photocell timerAJP 33(2),xiiiCircuit diagram for interfacing scalers to photocell timers.
9B10.30free fall timerAJP 28(9),817Gate a multivibrator to a scaler.
9B10.30interval timing with a scalerAJP 33(6),vGate a tuning fork oscillator to a scaler.
9B10.31photodiode gateAJP 40(8),1168A photodiode gate for the Beckman-Berkeley electronic timer.
9B10.32light operated millisec timerAJP 44(8),803Light activated gating of a 555 timer running at 100 kHz.
9B10.40big X4 timerAJP 49(7),701Abstract from the 1981 apparatus competition of a 1 ms timer with 2.8 in high digits.
9B10.45phototransistor adaptorAJP 45(9),881A photo transistor adaptor to control stopclocks, digital stopwatches, and digital timers.
9B10.50pendulum counter/timerAJP 43(3),280Circuit for a timer using a photocell that keeps track of the total time and the number of cycles.
9B10.60pulse counterAJP 45(11),1126Modify a four function pocket calculator to function as a pulse counter.

ReferenceDescription
M-1Sutton
Ma-1Freier & Anderson
M-1dHilton
8-2.8Meiners
1A12.01University of Minnesota Handbook
AJP 52(1),85American Journal of Physics
TPT 15(5),300The Physics Teacher
Disc 01-01The Video Encyclopedia of Physics Demonstrations

Return to:
[EQUIPMENT][MAIN BIBLIOGRAPHY]